Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Sindoh CM 2073/CM 3033/CM 3081 Security Target Author : RICOH COMPANY, LTD. Date : 2018-02-05 Version : 1.00 Portions of Sindoh CM 2073/CM 3033/CM 3081 Security Target are reprinted with written permission from IEEE, 445 Hoes Lane, Piscataway, New Jersey 08855, from U.S. Government Approved Protection Profile - U.S. Government Protection Profile for Hardcopy Devices Version 1.0 (IEEE Std 2600.2™-2009), Copyright © 2010 IEEE. All rights reserved. This document is a translation of the evaluated and certified security target written in Japanese. Page 1 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Revision History Version Date Author Detail 1.00 2018-02-05 RICOH COMPANY, LTD. Publication version. Page 2 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table of Contents 1 ST Introduction..................................................................................................................... 7 1.1 ST Reference .................................................................................................................. 7 1.2 TOE Reference ............................................................................................................... 7 1.3 TOE Overview................................................................................................................ 7 1.3.1 TOE Type..................................................................................................................... 7 1.3.2 TOE Usage................................................................................................................... 8 1.3.3 Major Security Features of TOE................................................................................ 9 1.4 TOE Description........................................................................................................... 10 1.4.1 Physical Boundary of TOE ....................................................................................... 10 1.4.2 Guidance Documents ................................................................................................ 13 1.4.3 Definition of Users .................................................................................................... 15 1.4.3.1. Direct User ......................................................................................................... 15 1.4.3.2. Indirect User ...................................................................................................... 16 1.4.4 Logical Boundary of TOE ......................................................................................... 16 1.4.4.1. Basic Functions.................................................................................................. 17 1.4.4.2. Security Functions............................................................................................. 19 1.4.5 Protected Assets ........................................................................................................ 21 1.4.5.1. User Data ........................................................................................................... 21 1.4.5.2. TSF Data ............................................................................................................ 21 1.4.5.3. Functions............................................................................................................ 22 1.5 Glossary........................................................................................................................ 22 1.5.1 Glossary for This ST ................................................................................................. 22 2 Conformance Claim............................................................................................................. 26 2.1 CC Conformance Claim................................................................................................ 26 2.2 PP Claims..................................................................................................................... 26 2.3 Package Claims............................................................................................................ 26 2.4 Conformance Claim Rationale ..................................................................................... 27 2.4.1 Consistency Claim with TOE Type in PP................................................................ 27 2.4.2 Consistency Claim with Security Problems and Security Objectives in PP......... 27 2.4.3 Consistency Claim with Security Requirements in PP.......................................... 28 3 Security Problem Definitions.............................................................................................. 30 Page 3 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 3.1 Threats ......................................................................................................................... 30 3.2 Organisational Security Policies.................................................................................. 31 3.3 Assumptions................................................................................................................. 31 4 Security Objectives.............................................................................................................. 33 4.1 Security Objectives for TOE......................................................................................... 33 4.2 Security Objectives of Operational Environment........................................................ 34 4.2.1 IT Environment......................................................................................................... 34 4.2.2 Non-IT Environment................................................................................................. 35 4.3 Security Objectives Rationale...................................................................................... 36 4.3.1 Correspondence Table of Security Objectives ......................................................... 36 4.3.2 Security Objectives Descriptions ............................................................................. 37 5 Extended Components Definition....................................................................................... 41 5.1 Restricted forwarding of data to external interfaces (FPT_FDI_EXP) ....................... 41 6 Security Requirements........................................................................................................ 43 6.1 Security Functional Requirements.............................................................................. 43 6.1.1 Class FAU: Security audit........................................................................................ 43 6.1.2 Class FCS: Cryptographic support .......................................................................... 46 6.1.3 Class FDP: User data protection ............................................................................. 47 6.1.4 Class FIA: Identification and authentication ......................................................... 51 6.1.5 Class FMT: Security management........................................................................... 54 6.1.6 Class FPT: Protection of the TSF............................................................................. 59 6.1.7 Class FTA: TOE access ............................................................................................. 60 6.1.8 Class FTP: Trusted path/channels........................................................................... 60 6.2 Security Assurance Requirements............................................................................... 60 6.3 Security Requirements Rationale................................................................................ 61 6.3.1 Tracing ....................................................................................................................... 61 6.3.2 Justification of Traceability...................................................................................... 63 6.3.3 Dependency Analysis ................................................................................................ 68 6.3.4 Security Assurance Requirements Rationale.......................................................... 70 7 TOE Summary Specification............................................................................................... 71 7.1 Audit Function ............................................................................................................. 71 7.2 Identification and Authentication Function ................................................................ 73 Page 4 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 7.3 Document Access Control Function ............................................................................. 75 7.4 Use-of-Feature Restriction Function ........................................................................... 77 7.5 Network Protection Function....................................................................................... 77 7.6 Residual Data Overwrite Function.............................................................................. 78 7.7 Stored Data Protection Function ................................................................................. 79 7.8 Security Management Function .................................................................................. 79 7.9 Software Verification Function .................................................................................... 83 7.10 Fax Line Separation Function ..................................................................................... 83 Page 5 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. List of Figures Figure 1 : Example of TOE Environment .......................................................................................................8 Figure 2 : Hardware Configuration of the TOE ............................................................................................ 11 Figure 3 : Logical Scope of the TOE ............................................................................................................ 16 List of Tables Table 1 : Guidance Documents ..................................................................................................................... 14 Table 2 : Definition of Users......................................................................................................................... 15 Table 3 : List of Administrative Roles .......................................................................................................... 15 Table 4 : Definition of User Data.................................................................................................................. 21 Table 5 : Definition of TSF Data................................................................................................................... 21 Table 6 : Specific Terms Related to This ST................................................................................................. 22 Table 7 : Rationale for Security Objectives................................................................................................... 36 Table 8 : List of Auditable Events................................................................................................................. 44 Table 9 : List of Cryptographic Key Generation........................................................................................... 46 Table 10 : List of Cryptographic Operation .................................................................................................. 47 Table 11 : List of Subjects, Objects, and Operations among Subjects and Objects (a) ................................. 47 Table 12 : List of Subjects, Objects, and Operations among Subjects and Objects (b)................................. 48 Table 13 : Subjects, Objects and Security Attributes (a) ............................................................................... 48 Table 14 : Rules to Control Operations on Document Data and User Jobs (a) ............................................. 48 Table 15 : Additional Rules to Control Operations on Document Data and User Jobs (a)............................ 50 Table 16 : Subjects, Objects and Security Attributes (b)............................................................................... 50 Table 17 : Rule to Control Operations on MFP Applications (b) .................................................................. 51 Table 18 : List of Authentication Events....................................................................................................... 51 Table 19 : List of Actions for Authentication Failure.................................................................................... 52 Table 20 : List of Security Attributes for Each User That Shall Be Maintained ........................................... 52 Table 21 : Rules for Initial Association of Attributes.................................................................................... 54 Table 22 : User Roles for Security Attributes (a) .......................................................................................... 54 Table 23 : User Roles for Security Attributes (b).......................................................................................... 55 Table 24 : Authorised Identified Roles Allowed to Override Default Values................................................ 56 Table 25 : List of TSF Data........................................................................................................................... 57 Table 26 : List of Specification of Management Functions........................................................................... 58 Table 27 : TOE Security Assurance Requirements (EAL2+ALC_FLR.2).................................................... 60 Table 28 : Relationship between Security Objectives and Functional Requirements ................................... 62 Table 29 : Results of Dependency Analysis of TOE Security Functional Requirements .............................. 69 Table 30 : List of Audit Events...................................................................................................................... 71 Table 31 : List of Audit Log Items ................................................................................................................ 72 Table 32 : Unlocking Administrators for Each User Role............................................................................. 74 Table 33 : Stored Documents Access Control Rules for Normal Users ........................................................ 76 Table 34 : Encrypted Communications Provided by the TOE ...................................................................... 78 Table 35 : List of Cryptographic Operations for Stored Data Protection ...................................................... 79 Page 6 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 36 : Management of TSF Data ............................................................................................................ 79 Table 37 : List of Static Initialisation for Security Attributes of Document Access Control SFP ................. 82 Page 7 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 1 ST Introduction This section describes ST Reference, TOE Reference, TOE Overview and TOE Description. 1.1 ST Reference The following are the identification information of this ST. Title : Sindoh CM 2073/CM 3033/CM 3081 Security Target Version : 1.00 Date : 2018-02-05 Author : RICOH COMPANY, LTD. 1.2 TOE Reference The identification information of the TOE is shown below. TOE Names : Sindoh CM 2073/CM 3033/CM 3081 Version : 1.00 TOE Type : Digital multifunction product (hereafter "MFP") Target MFP : MFP equipped with either an Auto Document Feeder (ADF) (Auto Reverse Document Feeder), Auto Document Feeder (ADF) (one-pass duplex scanning ADF), or exposure glass cover. - CM 2073, CM 3033, CM 3081 Above MFP with D430 Ser. Fax Option Type M19. Make clear to the sales representative that you purchase the MFP as CC-certified product. 1.3 TOE Overview This section defines TOE Type, TOE Usage and Major Security Features of TOE. 1.3.1 TOE Type This TOE is an MFP, which is an IT device that inputs, stores, and outputs documents. Page 8 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 1.3.2 TOE Usage The operational environment of the TOE is illustrated below and the usage of the TOE is outlined in this section. Figure 1 : Example of TOE Environment The TOE is used by connecting to the local area network (hereafter "LAN") and telephone lines, as shown in Figure 1. Users can operate the TOE from the Operation Panel of the TOE or through LAN communications. Below, explanations are provided for the MFP, which is the TOE itself, and hardware and software other than the TOE. MFP A machinery that is defined as the TOE. The MFP is connected to the office LAN, and users can perform the following operations from the Operation Panel of the MFP: - Various settings for the MFP, - Copy, fax, storage, and network transmission of paper documents, - Print, fax, network transmission, and deletion of the stored documents. Page 9 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Also, the TOE receives information via telephone lines and can store it as a document. LAN Network used in the TOE environment. Client computer A computer that performs as a client of the TOE if it is connected to the LAN, and users can remotely operate the MFP from the client computer. The possible remote operations from the client computer are as follows: - Various settings for the MFP using a Web browser installed on the client computer, - Operation of stored documents using a Web browser installed on the client computer, - Storage and/or printing of documents using the printer driver installed on the client computer, - Storage and/or faxing of documents using the fax driver installed on the client computer. Telephone line A public line for the TOE to communicate with external faxes. Firewall A device to prevent the office environment from network attacks via the Internet. FTP Server A server used by the TOE for folder transmission of the stored documents in the TOE to its folders. SMB Server A server used by the TOE for folder transmission of the stored documents in the TOE to its folders. SMTP Server A server used by the TOE for e-mail transmission. 1.3.3 Major Security Features of TOE The TOE stores documents in it, and sends and receives documents to and from the IT devices connected to the LAN. To ensure provision of confidentiality and integrity for those documents, the TOE has the following security features: - Audit Function - Identification and Authentication Function - Document Access Control Function - Use-of-Feature Restriction Function - Network Protection Function Page 10 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. - Residual Data Overwrite Function - Stored Data Protection Function - Security Management Function - Software Verification Function - Fax Line Separation Function 1.4 TOE Description This section describes Physical Boundary of TOE, Guidance Documents, Definition of Users, Logical Boundary of TOE, and Protected Assets. 1.4.1 Physical Boundary of TOE The physical boundary of the TOE is the MFP, which consists of the following hardware components (shown in Figure 2): Operation Panel Unit, Engine Unit, Fax Controller Unit, Paper Feed Unit, Controller Board, HDD, Ic Ctlr, Network Unit, USB Slot (Controller Board), SD Card Slot (Controller Board), SD Card Slot (Operation Panel Unit), USB Memory Slot, USB Slot (Operation Panel Unit), and miniUSB Slot. Page 11 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Figure 2 : Hardware Configuration of the TOE Controller Board The Controller Board is a device that contains Processors, RAM, NVRAM, Ic Key, and FlashROM. The Controller Board sends and receives information to and from the units and devices that constitute the MFP, and this information is used to control the MFP. The information to control the MFP is processed by the MFP Control Software on the Controller Board. The following describes the components of the Controller Board: - Processor A semiconductor chip that performs basic arithmetic processing for MFP operations. - RAM A volatile memory medium with standard configuration which is used as a working area for image processing such as compressing/decompressing the image data. It can also be used to temporarily read and write internal information. - NVRAM A non-volatile memory medium in which TSF data for configuring MFP operations is stored. Page 12 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. - Ic Key A security chip that has the functions of random number generation, cryptographic key generation and digital signature. It has the memory medium inside, and the signature root key is installed before the TOE is shipped. - FlashROM A non-volatile memory medium in which the MFP Control Software that constitutes the TOE is installed. Paper Feed Unit The Paper Feed Unit is a device that is equipped with MFP. The Paper Feed Unit includes Auto Document Feeder (ADF) (Auto Reverse Document Feeder), Auto Document Feeder (ADF) (one-pass duplex scanning ADF), and exposure glass cover. Operation Panel Unit (hereafter "Operation Panel") The Operation Panel is a user interface installed on the TOE and consists of the following devices: key switches, LED indicators, an LCD touch screen, and Operation Panel Control Board. The Operation Panel Control Board is connected to the key switches, LED indicators, and LCD touch screen. The Operation Panel Control Software is installed on the Operation Panel Control Board. The Operation Panel Control Software performs the following: 1. Transfers operation instructions from the key switches and the LCD touch screen to the Controller Board. 2. Controls the LEDs and displays information on the LCD touch screen according to display instructions from the Controller Board. Engine Unit The Engine Unit consists of Scanner Engine that is an input device to read paper documents, Printer Engine that is an output device to print and eject paper documents, and Engine Control Board. The Engine Control Software is installed in the Engine Control Board. The Engine Control Software sends status information about the Scanner Engine and Printer Engine to the Controller Board, and operates the Scanner Engine or Printer Engine according to instructions from the MFP Control Software. Fax Controller Unit (FCU) The Fax Controller Unit is a unit that has a modem function for connection to a telephone line. It also sends and receives fax data to and from other fax devices using the G3 standard for communication. The Fax Controller Unit sends and receives control information about the Controller Board and the FCU and fax data. The FCU has a line connection terminal which conforms to the G3 standard and connects to a single telephone line. FCU Control Software is installed on the FCU. HDD The HDD is a hard disk drive that is a non-volatile memory medium. It stores documents, login user names and login passwords of normal users. Page 13 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Ic Ctlr The Ic Ctlr is a board that implements data encryption and decryption functions. It is provided with functions for HDD encryption realisation. Network Unit The Network Unit is an external interface to an Ethernet (100BASE-TX/10BASE-T) LAN. USB Slot (Controller Board) The USB Slot is an external interface to connect a client computer to the TOE for printing directly from the client computer. During installation, this interface is disabled. SD Card Slot (Controller Board) There are SD Card Slots for customer engineer and for users. The SD Card Slot for customer engineer is used when the customer engineer installs the TOE. A cover is placed on the SD Card Slot during the TOE operation so that an SD Card cannot be inserted into or removed from the slot. The SD Card Slot for users is used by users to print documents in the SD Card. The slot is set to disabled at the installation. SD Card Slot (Operation Panel Unit) The SD Card Slot is used by users to print documents in the SD Card and is set to disabled at the installation. USB Memory Slot The USB Memory Slot is used by users to print documents in the USB Memory and is set to disabled at the installation. USB Slot (Operation Panel Unit) The USB Slot is used by users to utilize a camera, USB keyboard, or USB card reader and is set to disabled at the installation. miniUSB Slot The miniUSB Slot is used by users to utilize the NFC and is set to disabled at the installation. 1.4.2 Guidance Documents The following describes user guidance documents for this TOE. Page 14 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 1 : Guidance Documents TOE Components Guidance Documents for Product Part Number Guidance Document Name Format Distribution Method MFP D241-7239 SOFTWARE LICENSE AGREEMENT Brochure Included in the product D244-7052 Notes for Using This Machine Safely Brochure Included in the product D0AF-7493 Read This First pdf Through the Web D0AF-7489 User Guide pdf Through the Web D0AF-7490 Operating Instructions Driver Installation Guide pdf Through the Web D0AF-7491 About Open Source Software License pdf Through the Web D0AF-7072 About This Machine html Through the Web D0AF-7073 Copy/ Document Server html Through the Web D0AF-7074 Fax html Through the Web D0AF-7075 Print html Through the Web D0AF-7076 Scan html Through the Web D0AF-7077 Troubleshooting html Through the Web D0AF-7078 Connecting the Machine/ System Settings html Through the Web D0AF-7079 PostScript 3 html Through the Web D0AF-7080 Security Guide html Through the Web D0AF-7081 Extended Feature Settings html Through the Web D0AF-7492 Notes for Administrators: Using This Machine in a Network Environment Compliant with IEEE Std 2600.2TM -2009 pdf Through the Web D146-7587 Notes on Security Functions pdf Through the Web 83NHDBENZ 1.10 v191 Web Image Monitor Help html Through the Web Page 15 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 1.4.3 Definition of Users This section defines the users related to the TOE. These users include those who routinely use the TOE (direct users) and those who do not (indirect users). The direct users and indirect users are described as follows: 1.4.3.1. Direct User The "user" referred to in this ST indicates a direct user. This direct user consists of normal users and administrators. The following table (Table 2) shows the definitions of these direct users. Table 2 : Definition of Users Definition of Users Explanation Normal user A user who is allowed to use the TOE. A normal user is provided with a login user name and can use Copy Function, Fax Function, Scanner Function, Printer Function, and Document Server Function. Administrator A user who is allowed to manage the TOE. An administrator performs management operations, which include issuing login names to normal users. The administrator means the user registered for TOE management. According to its roles, the administrator can be classified as the supervisor and the MFP administrator. Up to four MFP administrators can be registered and selectively authorised to perform user management, machine management, network management, and file management. Therefore, the different roles of the management privilege can be allocated to multiple MFP administrators individually. The "MFP administrator" in this ST refers to the MFP administrator who has all management privileges (Table 3). Table 3 : List of Administrative Roles Definition of Administrator Management Privileges Explanation Supervisor Supervisor Authorised to modify the login password of the MFP administrator. MFP administrator User management privilege Authorised to manage normal users. This privilege allows configuration of normal user settings. Machine management privilege Authorised to specify MFP device behaviour (network behaviours excluded). This privilege allows configuration of device settings and view of the audit log. Network management privilege Authorised to manage networks and configure LAN settings. This privilege allows configuration of network settings. Page 16 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Definition of Administrator Management Privileges Explanation File management privilege Authorised to manage stored documents. This privilege allows access management of stored documents. 1.4.3.2. Indirect User Responsible manager of MFP The responsible manager of MFP is a person who is responsible for selection of the TOE administrators in the organisation where the TOE is used. Customer engineer The customer engineer is a person who belongs to the organisation which maintains TOE operation. The customer engineer is in charge of installation, setup, and maintenance of the TOE. 1.4.4 Logical Boundary of TOE The Basic Functions and Security Functions are described as follows: Figure 3 : Logical Scope of the TOE Page 17 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 1.4.4.1. Basic Functions The overview of the Basic Functions is described as follows: Copy Function The Copy Function is to scan paper documents and copy scanned image data from the Operation Panel. Magnification and other editorial jobs can be applied to the copy image. It can also be stored on the HDD as a Document Server document. Printer Function The Printer Function is to print or store the documents received from the printer driver installed on the client computer. It also allows users to print and delete the documents stored in the TOE from the Operation Panel or the client computer. - Receiving documents from the printer driver installed on the client computer. The TOE receives documents from the printer driver installed on the client computer. Printing methods for documents is selected by users from the printer driver. The printing methods include direct print, Document Server storage, locked print, stored print, hold print, and sample print. For direct print, documents received by the TOE will be printed. The documents will not be stored in the TOE. For Document Server storage, the received documents will be stored on the HDD as Document Server documents. For locked print, stored print, hold print, and sample print, the received documents will be stored on the HDD as printer documents. A dedicated password, which is used for locked print, is not subject to this evaluation. - Operating from the Operation Panel The TOE can print or delete printer documents according to the operations by users from the Operation Panel. - Operating from the client computer The TOE can print or delete printer documents according to the operations by users from the client computer. - Deleting printer documents by the TOE The deletion of printer documents by the TOE differs depending on printing methods. If locked print, hold print, or sample print is specified, the TOE deletes printer documents when printing is complete. If stored print is specified, the TOE does not delete printer documents even when printing is complete. According to the guidance document, users first install the specified printer driver on their own client computers, and then use this function. Scanner Function The Scanner Function is for users to scan paper documents by operating from the Operation Panel. The users can send and then save those scanned documents to SMB server, FTP server, and the client computer. The images of the scanned paper documents can be stored in the TOE to be transmitted or deleted afterwards. Page 18 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Methods to transmit documents include folder transmission, e-mail transmission of attachments, and e-mail transmission of the URL. Folder transmission can be applied only to the destination folders in a server that the MFP administrator pre-registers in the TOE and with which secure communication can be ensured. E-mail transmission of attachments and e-mail transmission of the URL are possible only with the mail server and e-mail addresses that the MFP administrator pre-registers in the TOE and with which secure communication can be ensured. Users, who receive e-mails sent by e-mail transmission of the URL, can download scanner documents to the client computer. Fax Function As for the Fax Function, the fax complying with the G3 standard, which uses a telephone line, is the target of evaluation. This function consists of Fax Transmission Function and Fax Reception Function. Fax Transmission Function is to send paper documents or images of electronic documents in the client computer as documents to external fax devices. Faxes are allowed to be sent only to the telephone numbers that are pre-registered in the TOE. Documents for fax transmission can be stored in the TOE. This is called the Fax Data Storage Function, and those documents stored in the TOE are called fax transmission documents. Fax transmission documents can be sent by fax, printed, deleted, sent to folders, and sent as attachments by e-mail, all from the Operation Panel. To send documents from the client computer by fax, the fax driver specified in the guidance documents must be installed on the client computer. A person who sends fax can send the transmission results by e-mail to the e-mail addresses that the MFP administrator pre-registers in the TOE. This is called the E-mail TX Results Function. The person who sends the fax can also send fax transmission documents as attachments by e-mail to the e-mail addresses that the MFP administrator pre-registers in the TOE. The MFP administrator pre-registers the destination servers that provide secure communication with the TOE for folder transmission. Users select the destination server from the servers that the MFP administrator pre-registers, and send data to the folder. Fax Reception Function is to store documents, which are received from external faxes via a telephone line, in the TOE. The documents stored in the TOE can be printed or deleted from the Operation Panel or the client computer. The documents stored in the TOE can also be downloaded to the client computer. Document Server Function The Document Server Function is to operate documents stored in the TOE by using the Operation Panel and the client computer. From the Operation Panel, users can store, print and delete Document Server documents. Also, users can print and delete fax transmission documents. From the client computer, users can print and delete Document Server documents, fax, print, download, and delete fax transmission documents. Also, users can send scanner documents to folders, send them by e-mail as attachments, download, and delete them. Management Function The Management Function is to control the MFP's overall behaviour. The management function can be operated by using the Operation Panel or the client computer. Page 19 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Maintenance Function The Maintenance Function is to perform maintenance service for the MFP if it is malfunctioning. When analysing causes of the malfunction, a customer engineer operates this function from the Operation Panel. The customer engineer will implement this function following the procedures that are allowed to customer engineers only. If the MFP administrator sets the Service Mode Lock Function to "ON", the customer engineer cannot use this function. In this ST, the Service Mode Lock Function is set to "ON" for the target of evaluation. Web Image Monitor Function The Web Image Monitor Function (hereafter "WIM") is for the TOE user to remotely control the TOE from the client computer. The Operation Panel screen of the connected MFP can be displayed by the MFP administrator. To use this function, the TOE user needs to install the designated Web browser on the client computer following the guidance documents and connect the client computer to the TOE via the LAN. 1.4.4.2. Security Functions The Security Functions are described as follows: Audit Function The Audit Function is to generate the audit log of TOE use and security-relevant events (hereafter, "audit events"). Also, this function provides the recorded audit log in a legible fashion for users to audit. This function can be used only by the MFP administrator to view and delete the recorded audit log. To view the audit log, WIM will be used, and to delete the audit log, WIM or the Operation Panel will be used. Identification and Authentication Function The Identification and Authentication Function is to verify persons before they use the TOE. The persons are allowed to use the TOE only when confirmed as the authorised user. Users can use the TOE from the Operation Panel or via the network. By the network, users can use the TOE from a Web browser and printer/fax driver. A person who attempts to use the TOE from the Operation Panel or a Web browser will be required to enter his or her login user name and login password so that he or she can be verified as a normal user, MFP administrator, or supervisor. A person who attempts to use the Printer or Fax Function from the printer or fax driver will be required to enter his or her login user name and login password received from the printer or fax drivers, so that he or she can be verified as a normal user. This function includes protection functions for the authentication feedback area, where dummy characters are displayed if a login password is entered using the Operation Panel. In addition, this function can be used to register passwords that fulfil the requirements of the Minimum Character No. (i.e. minimum password length) and obligatory character types the MFP administrator specifies, so that the lockout function can be enabled and login password quality can be protected. Page 20 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Document Access Control Function The Document Access Control Function is to authorise the operations for documents and user jobs by the authorised TOE users who are authenticated by Identification and Authentication Function. It allows user's operation on the user documents and user jobs based on the privileges for the user role, or the operation permissions for each user. Use-of-Feature Restriction Function The Use-of-Feature Restriction Function is to authorise the operations of Copy Function, Printer Function, Scanner Function, Document Server Function and Fax Function by the authorised TOE users who are authenticated by Identification and Authentication Function. It authorises the use of functions based on the user role and the operation permissions for each user. Network Protection Function The Network Protection Function is to prevent information leakage through wiretapping on the LAN and detect data tampering. When using WIM from the client computer, the protection function can be enabled by specifying the URL where encrypted communication is available. If the Printer Function is used, the protection function can be enabled using the printer driver to specify encrypted communication. If the folder transmission function of Scanner Function is used, the protection function can be enabled through encrypted communication. If the e-mail transmission function of Scanner Function is used, the protection function can be enabled through encrypted communication with communication requirements that are specified for each e-mail address. If the LAN-Fax Transmission Function of Fax Function is used, the protection function can be enabled using the fax driver to specify encrypted communication. Residual Data Overwrite Function The Residual Data Overwrite Function is to overwrite specific patterns on the HDD and disable the reusing of the residual data included in deleted documents, temporary documents and their fragments on the HDD. Stored Data Protection Function The Stored Data Protection Function is to encrypt the data on the HDD and protect the data so that data leakage can be prevented. Security Management Function The Security Management Function is to control operations for TSF data in accordance with user role privileges or user privileges allocated to normal users, MFP administrator, and supervisor. Software Verification Function The Software Verification Function is to verify the integrity of the executable codes of the MFP Control Software, FCU Control Software, and Operation Panel Control Software, and to ensure that they can be trusted. Page 21 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Fax Line Separation Function The Fax Line Separation Function is to restrict input information from the telephone lines so that only fax data can be received and unauthorised intrusion from the telephone lines (same as the "fax line") can be prevented. Also, this function can be used to prohibit transmissions of received faxes so that unauthorised intrusion from the telephone lines to the LAN can be prevented. 1.4.5 Protected Assets Assets to be protected by the TOE are user data, TSF data, and functions. 1.4.5.1. User Data The user data is classified into two types: document data and function data. Table 4 defines user data according to these data types. Table 4 : Definition of User Data Type Description Document data Digitised documents, deleted documents, temporary documents and their fragments, which are managed by the TOE. Function data Jobs specified by users. In this ST, a "user job" is referred to as a "job". 1.4.5.2. TSF Data The TSF data is classified into two types: protected data and confidential data. Table 5 defines TSF data according to these data types. Table 5 : Definition of TSF Data Type Description Protected data This data must be protected from changes by unauthorised persons. No security threat will occur even this data is exposed to the public. In this ST, "protected data", listed below, is referred to as "TSF protected data". Login user name, Number of Attempts before Lockout, settings for Lockout Release Timer, lockout time, date settings (year/month/day), time settings, Minimum Character No., Password Complexity Setting, Operation Panel auto logout time, WIM auto logout time, S/MIME user information, destination folder, Stored Reception File User, document user list, available function list, user authentication method, IPsec setting information, and Device Certificate. Confidential data This data must be protected from changes by unauthorised persons and reading by users without viewing permissions. In this ST, "confidential data", listed below, is referred to as "TSF confidential data". Login password, audit log, and HDD cryptographic key. Page 22 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 1.4.5.3. Functions The MFP applications (Copy Function, Document Server Function, Printer Function, Scanner Function, and Fax Function) that are for management of the document data of user data are classified as protected assets, whose use is subject to restrictions. 1.5 Glossary 1.5.1 Glossary for This ST For clear understanding of this ST, Table 6 provides the definitions of specific terms. Table 6 : Specific Terms Related to This ST Terms Definitions MFP Control Software A software component installed in the TOE. This component is stored in FlashROM. FCU Control Software A software component installed in the TOE. This component is stored in the FCU. Login user name An identifier assigned to each normal user, MFP administrator, and supervisor. The TOE identifies users by this identifier. Login password A password associated with each login user name. Lockout A type of behaviour to deny login of particular users. Auto Logout function A function for automatic user logout if no access is attempted from the Operation Panel or the client computer before the predetermined time elapses. Also called Auto Logout. Operation Panel auto logout time Auto logout time for the Operation Panel. WIM auto logout time Auto logout time for WIM. Minimum Character No. The minimum number of registrable password digits. Password Complexity Setting The minimum combination of the characters and symbols that can be used as registrable passwords. There are four types of characters: uppercase and lower case alphabets, digits and symbols. There are Level 1 and Level 2 Password Complexity Settings. Level 1 requires a password to be a combination of two or more types of characters and symbols specified above. Level 2 requires a password to be a combination of three or more types of characters and symbols specified above. HDD An abbreviation of hard disk drive. In this document, unless otherwise specified, "HDD" indicates the HDD installed on the TOE. Page 23 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Terms Definitions User job A sequence of operations of each TOE function (Copy Function, Document Server Function, Scanner Function, Printer Function and Fax Function) from beginning to end. A user job may be suspended or cancelled by users during operation. If a user job is cancelled, the job will be terminated. Documents General term for paper documents and electronic documents used in the TOE. Document data attributes Attributes of document data, such as +PRT, +SCN, +CPY, +FAXOUT, +FAXIN, and +DSR. +PRT One of the document data attributes. Documents printed from the client computer, or documents stored in the TOE by locked print, hold print, and sample print using the client computer. +SCN One of the document data attributes. Documents sent to IT devices by e-mail or sent to folders, or downloaded on the client computer from the MFP. For these operations the Scanner Function is used. +CPY One of the document data attributes. Copies of original documents made by using Printer Function. +FAXOUT One of the document data attributes. Documents sent by fax or to folders by using Fax Function. +FAXIN One of the document data attributes. Documents received from the telephone line. Documents stored in the TOE after the reception, are also included. +DSR One of the document data attributes. Documents saved in the TOE by using Copy Function, Scanner Function, Document Server Function, and Fax Data Storage Function. Documents saved in the TOE after being printed with Document Server printing or stored print from the client computer. Document user list One of the security attributes of document data. A list of the login user names of the normal users whose access to documents is authorised, and it can be set for each document data. This list does not include the login user names of MFP administrators whose access to the document data is possible for administration. Stored documents Documents stored in the TOE so that they can be used with Document Server Function, Printer Function, Scanner Function, and Fax Function. Stored document type Classification of stored documents according to their purpose of use. This includes Document Server documents, printer documents, scanner documents, fax transmission documents, and fax reception documents. Document Server documents One of the stored document types. Documents stored in the TOE when Document Server storage is selected as the printing method for Copy Function, Document Server Function, and Printer Function. Printer documents One of the stored document types. Documents stored in the TOE when any one of locked print, hold printing, and sample print is selected as the printing method for Printer Function. Scanner documents One of the stored document types. Documents stored in the TOE using Scanner Function. Fax transmission documents One of the stored document types. Documents scanned and stored using Fax Function, and those stored using the LAN Fax. Page 24 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Terms Definitions Fax reception documents One of the stored document types. Documents received by fax and stored. These documents are externally received and whose "users cannot be identified". MFP application A general term for each function the TOE provides: Copy Function, Document Server Function, Scanner Function, Printer Function, and Fax Function. Available function list A list of the functions (Copy Function, Printer Function, Scanner Function, Document Server Function, and Fax Function) that normal users are authorised to access. This list is assigned as an attribute of each normal user. Operation Panel A panel that consists of a touch screen LCD and key switches. The Operation Panel is used by users to operate the TOE. Stored Reception File User A list of the normal users who are authorised to read and delete fax reception documents. Folder transmission A function that sends documents from the MFP via networks to a shared folder in an SMB Server by using SMB protocol or that sends documents to a shared folder in an FTP Server by using FTP protocol. The following documents can be delivered to folders: scanned documents using Scanner Function and Fax Function, and scanned and stored documents using Scanner Function and Fax Function. IPsec protects the communication for realising this function. Destination folder Destination information for the "folder transmission" function. The destination folder includes the path information to the destination server, the folder in the server, and identification and authentication information for user access. The destination folder is registered and managed by the MFP administrator. E-mail transmission A function to send e-mails from the MFP to the client computer via the SMTP Server. E-mail transmission of attachments A function to send documents scanned by the Scanner Function or fax transmission documents as e-mail. S/MIME protects the communication for realising this function. E-mail transmission of the URL A function to send the URL of scanner documents stored in the MFP by e-mail. S/MIME user information Information required for e-mail transmission using S/MIME. Also, this information consists of e-mail address, user certificate, and encryption setting (S/MIME setting). Uniquely provided for each e-mail address, the S/MIME user information is registered and managed by the MFP administrator. IPsec setting information Information that determines the action of IPsec of the TOE. LAN Fax One of Fax Functions. A function that transmits fax data and stores the documents using the fax driver on client computer. Sometimes referred to as "PC FAX". Exposure glass cover A cover to hold an original placed on the exposure glass of the scanner device that reads the original. Auto Document Feeder (ADF) (Auto Reverse Document Feeder) A device that feeds the originals set on the device one by one to the exposure glass. When scanning both sides of the original, each side is scanned in turn. Page 25 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Terms Definitions Auto Document Feeder (ADF) (one-pass duplex scanning ADF) A device that feeds the originals set on the device one by one to the exposure glass. When scanning both sides of the original, both sides are scanned simultaneously. Page 26 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 2 Conformance Claim This section describes Conformance Claim. 2.1 CC Conformance Claim The CC conformance claim of this ST and TOE is as follows: - CC version for which this ST and TOE claim conformance Part 1: Introduction and general model April 2017 Version 3.1 Revision 5 (Japanese translation ver.1.0) CCMB-2017-04-001 Part 2: Security functional components April 2017 Version 3.1 Revision 5 (Japanese translation ver.1.0) CCMB-2017-04-002 Part 3: Security assurance components April 2017 Version 3.1 Revision 5 (Japanese translation ver.1.0) CCMB-2017-04-003 - Functional requirements: Part 2 extended - Assurance requirements: Part 3 conformance 2.2 PP Claims The PP to which this ST and TOE are demonstrable conformant is: PP Name/Identification : U.S. Government Approved Protection Profile - U.S. Government Protection Profile for Hardcopy Devices Version 1.0 (IEEE Std 2600.2™-2009) Version : 1.0 Notes: This PP conforms to "IEEE Standard Protection Profile for Hardcopy Devices in IEEE Std 2600-2008, Operational Environment B", published in Common Criteria Portal, and also satisfies "CCEVS Policy Letter #20". 2.3 Package Claims The SAR package which this ST and TOE conform to is EAL2+ALC_FLR.2. The selected SFR Packages from the PP are: 2600.2-PRT conformant 2600.2-SCN conformant 2600.2-CPY conformant Page 27 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 2600.2-FAX conformant 2600.2-DSR conformant 2600.2-SMI conformant 2.4 Conformance Claim Rationale 2.4.1 Consistency Claim with TOE Type in PP The targeted product type by the PP is the Hardcopy devices (hereafter, HCDs). The HCDs consist of the scanner device and print device, and have the interface to connect telephone line. The HCDs combine these devices and equip one or more functions of Copy Function, Scanner Function, Printer Function or Fax Function. The Document Server Function is also available when installing the non-volatile memory medium, such as hard disk drive, as additional equipment. The MFP is the type of this TOE. The MFP has the devices the HCDs have, and equips the functions that HCDs equip including the additional equipment. Therefore, this TOE type is consistent with the TOE type in the PP. 2.4.2 Consistency Claim with Security Problems and Security Objectives in PP Defining all security problems in the PP, P.STORAGE.ENCRYPTION was augmented to the security problem definitions in chapter 3. Defining all security objectives in the PP, O.STORAGE.ENCRYPTED was augmented to the security objectives in chapter 4. Described below are the rationale for these augmented security problems and security objectives that conform to the PP. Although the PP is written in English, the security problem definitions in chapter 3 and security objectives in chapter 4 are translated from English into Japanese. If the literal translation of the PP was thought to be difficult for readers to understand the PP in Japanese, the translation was made comprehensible. This, however, does not mean that its description deviates from the requirements of the PP conformance. Also, the description is neither increased nor decreased. Augmentation of P.STORAGE.ENCRYPTION and O.STORAGE.ENCRYPTED P.STORAGE.ENCRYPTION and O.STORAGE.ENCRYPTED encrypt data on HDD and satisfy both other organisational security policies in the PP and security objectives of the TOE. Therefore, P.STORAGE.ENCRYPTION and O.STORAGE.ENCRYPTED were augmented but still conform to the PP. Augmentation of threat scope of T.DOC.DIS and T.DOC.ALT The definition of a user allowed to view or modify D.DOC is the same in this TOE and the PP. However, the PP defines the scope in which the leakage and tampering of D.DOC may occur as inside the TOE. While on the other hand, the TOE defines it as inside the TOE and TOE’s communication path, which means that the TOE incorporates the PP. Therefore, T.DOC.DIS and T.DOC.ALT conform to the PP. Page 28 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Augmentation of threat scope of T.FUNC.ALT The definition of a user allowed to modify D.FUNC is the same in this TOE and the PP. However, the PP defines the scope in which the threat of tampering D.FUNC may occur as inside the TOE. While on the other hand, the TOE defines it as inside the TOE and TOE’s communication path, which means that the TOE incorporates the PP. Therefore, T.FUNC.ALT conforms to the PP. For those points mentioned above, the security problems and security objectives in this ST are consistent with those in the PP. 2.4.3 Consistency Claim with Security Requirements in PP The SFRs for this TOE consist of the Common Security Functional Requirements, 2600.2-PRT, 2600.2-SCN, 2600.2-CPY, 2600.2-FAX, 2600.2-DSR, and 2600.2-SMI. The Common Security Functional Requirements are the indispensable SFR specified by the PP. 2600.2-PRT, 2600.2-SCN, 2600.2-CPY, 2600.2-FAX, 2600.2-DSR, and 2600.2-SMI are selected from the SFR Package specified by the PP. 2600.2-NVS is not selected because this TOE does not have any non-volatile memory medium that is detachable. Although the security requirements of this ST were partly augmented and instantiated over the security requirements of the PP, they are still consistent with the PP. Described below are the parts augmented and instantiated with the reasons for their consistency with the PP. Augmentation of FAU_STG.1, FAU_STG.4, FAU_SAR.1, and FAU_SAR.2 FAU_STG.1, FAU_STG.4, FAU_SAR.1, and FAU_SAR.2 are augmented according to PP APPLICATION NOTE7 in order for the TOE to maintain and manage the audit logs. Augmentation of FIA_AFL.1, FIA_UAU.7, and FIA_SOS.1 For the Identification and Authentication Function of the TOE, FIA_AFL.1, FIA_UAU.7, and FIA_SOS.1 are augmented according to PP APPLICATION NOTE38. Ownership of Fax Reception Documents For the ownership of the fax reception documents, the TOE has the characteristic that the ownership of the document is assigned to the intended user. This is according to PP APPLICATION NOTE 95. Augmentation of FCS_CKM.1 and FCS_COP.1 This TOE claims O.STORAGE.ENCRYPTED as the security objectives for the data protection applied to non-volatile memory media that are neither allowed to be attached nor removed by the administrator. To fulfil this claim, additional changes were augmented to the functional requirements FCS_CKM.1 and FCS_COP.1 and to the functional requirements interdependent with FCS_CKM.1 and FCS_COP.1; however, these changes still satisfy the functional requirements demanded in the PP. Page 29 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Augmentation of restricted forwarding of data to external interface (FPT_FDI_EXP) This TOE, in accordance with the PP, extends the functional requirement Part 2 due to the addition of the restricted forwarding of data to external interfaces (FPT_FDI_EXP). Consistency Rationale of FDP_ACF.1(a) While FDP_ACF.1.1(a) and FDP_ACF.1.2(a) in the PP require the access control SFP to the document data that is defined for each SFR package in the PP, this ST requires the access control SFP to the document data that is defined for each document data attribute, which is the security attribute for objects. This is not a deviation from the PP but an instantiation of the PP. Although FDP_ACF.1.3(a) in the PP has no additional rules on access control of document data and user jobs, this ST allows the MFP administrator to delete document data and user jobs. All users are not allowed to modify user jobs. The TOE allows the MFP administrator to delete document data and user jobs on behalf of normal users who are privileged to delete them in case normal users cannot execute such privileges for some reasons. This does not deviate from the access control SFP defined in the PP. Although FDP_ACF.1.4(a) in the PP has no additional rules on access control of document data and user jobs, this ST rejects supervisor to operate document data and user jobs. Supervisor is not identified in the PP and are the special users for this TOE. This indicates that the PP does not allow users to operate the TOE, unless they are identified as the users of document data and user jobs. Therefore, FDP_ACF.1(a) in this ST satisfies FDP_ACF.1(a) in the PP. Additional Rules on FDP_ACF.1.3(b) While FDP_ACF.1.3(b) in the PP allows users with administrator privileges to operate the TOE functions, this ST allows them to operate Fax Reception Function only, which is part of the TOE functions. The TOE allows the MFP administrator to delete document data and user jobs (document access control SFP, FDP_ACC.1(a) and FDP_ACF.1(a)), and as a result, the TSF restrictively allows the MFP administrator to access the TOE functions. Therefore, the requirements described in FDP_ACF.1.3(b) in the PP are satisfied at the same time. The fax reception process, which is accessed when receiving from a telephone line, is regarded as a user with administrator privileges. Therefore, FDP_ACF.1.3(b) in this ST satisfies FDP_ACF.1.3(b) in the PP. FTP_ITC.1.3 including D.DOC and D.FUNC Although the PP does not define threat of leakage and tampering of D.DOC and D.FUNC in the communication path, FTP_ITC.1.3 in this ST states that D.DOC and D.FUNC communicate via the trusted channel. This suggests that the TOE protects D.DOC and D.FUNC in wider scope than the PP does. FTP_ITC.1.3 in this ST satisfies the PP. Page 30 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 3 Security Problem Definitions This section describes Threats, Organisational Security Policies and Assumptions. 3.1 Threats Defined and described below are the assumed threats related to the use and environment of this TOE. The threats defined in this section are unauthorised persons with knowledge of published information about the TOE operations and such attackers are capable of Basic attack potential. T.DOC.DIS Document disclosure Documents under the TOE management may be disclosed to persons without a login user name, or to persons with a login user name but without an access permission to the document. T.DOC.ALT Document alteration Documents under the TOE management may be altered by persons without a login user name, or by persons with a login user name but without an access permission to the document. T.FUNC.ALT User job alteration User jobs under the TOE management may be altered by persons without a login user name, or by persons with a login user name but without an access permission to the user job. T.PROT.ALT Alteration of TSF protected data TSF Protected Data under the TOE management may be altered by persons without a login user name, or by persons with a login user name but without an access permission to the TSF Protected Data. T.CONF.DIS Disclosure of TSF confidential data TSF Confidential Data under the TOE management may be disclosed to persons without a login user name, or to persons with a login user name but without an access permission to the TSF Confidential Data. T.CONF.ALT Alteration of TSF confidential data TSF Confidential Data under the TOE management may be altered by persons without a login user name, or by persons with a login user name but without an access permission to the TSF Confidential Data. Page 31 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 3.2 Organisational Security Policies The following organisational security policies are taken: P.USER.AUTHORIZATION User identification and authentication Only users with operation permission of the TOE shall be authorised to use the TOE. P.SOFTWARE.VERIFICATION Software verification Procedures shall exist to self-verify executable code in the TSF. P.AUDIT.LOGGING Management of audit log records The TOE shall create and maintain a log of TOE use and security-relevant events. The audit log shall be protected from unauthorised disclosure or alteration, and shall be reviewed by authorised persons. P.INTERFACE.MANAGEMENT Management of external interfaces To prevent unauthorised use of the external interfaces of the TOE, operation of those interfaces shall be controlled by the TOE and its IT environment. P.STORAGE.ENCRYPTION Encryption of storage devices The data stored on the HDD inside the TOE shall be encrypted. 3.3 Assumptions The assumptions related to this TOE usage environment are identified and described. A.ACCESS.MANAGED Access management According to the guidance document, the TOE is placed in a restricted or monitored area that provides protection from physical access by unauthorised persons. A.USER.TRAINING User training The responsible manager of MFP trains users according to the guidance document and users are aware of the security policies and procedures of their organisation and are competent to follow those policies and procedures. A.ADMIN.TRAINING Administrator training Administrators are aware of the security policies and procedures of their organisation, are competent to correctly configure and operate the TOE in accordance with the guidance document following those policies and procedures. Page 32 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. A.ADMIN.TRUST Trusted administrator The responsible manager of MFP selects administrators who do not use their privileged access rights for malicious purposes according to the guidance document. Page 33 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 4 Security Objectives This section describes Security Objectives for TOE, Security Objectives of Operational Environment and Security Objectives Rationale. 4.1 Security Objectives for TOE This section describes the security objectives for the TOE. O.DOC.NO_DIS Protection of document disclosure The TOE shall protect documents from unauthorised disclosure by persons without a login user name, or by persons with a login user name but without an access permission to the document. O.DOC.NO_ALT Protection of document alteration The TOE shall protect documents from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the document. O.FUNC.NO_ALT Protection of user job alteration The TOE shall protect user jobs from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the job. O.PROT.NO_ALT Protection of TSF protected data alteration The TOE shall protect TSF Protected Data from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the TSF Protected Data. O.CONF.NO_DIS Protection of TSF confidential data disclosure The TOE shall protect TSF Confidential Data from unauthorised disclosure by persons without a login user name, or by persons with a login user name but without an access permission to the TSF Confidential Data. O.CONF.NO_ALT Protection of TSF confidential data alteration The TOE shall protect TSF Confidential Data from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the TSF Confidential Data. Page 34 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. O.USER.AUTHORIZED User identification and authentication The TOE shall require identification and authentication of users and shall ensure that users are authorised in accordance with security policies before allowing them to use the TOE. O.INTERFACE.MANAGED Management of external interfaces by TOE The TOE shall manage the operation of external interfaces in accordance with the security policies. O.SOFTWARE.VERIFIED Software verification The TOE shall provide procedures to self-verify executable code in the TSF. O.AUDIT.LOGGED Management of audit log records The TOE shall create and maintain a log of TOE use and security-relevant events in the MFP and prevent its unauthorised disclosure or alteration. O.STORAGE.ENCRYPTED Encryption of storage devices The TOE shall ensure that the data is encrypted first and then stored on the HDD. 4.2 Security Objectives of Operational Environment This section describes the security objectives of the operational environment. 4.2.1 IT Environment OE.AUDIT_STORAGE.PROTECTED Audit log protection in trusted IT products If audit logs are exported to a trusted IT product, the responsible manager of MFP shall ensure that those logs are protected from unauthorised access, deletion and modifications. OE.AUDIT_ACCESS.AUTHORIZED Audit log access control in trusted IT products If audit logs are exported to a trusted IT product, the responsible manager of MFP shall ensure that those logs can be accessed in order to detect potential security violations, and only by authorised persons. OE.INTERFACE.MANAGED Management of external interfaces in IT environment The IT environment shall take a countermeasure for the prevention of unmanaged access to TOE external interfaces. Page 35 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 4.2.2 Non-IT Environment OE.PHYSICAL.MANAGED Physical management According to the guidance document, the TOE shall be placed in a secure or monitored area that provides protection from physical access to the TOE by unauthorised persons. OE.USER.AUTHORIZED Assignment of user authority The responsible manager of MFP shall give users the authority to use the TOE in accordance with the security policies and procedures of their organisation. OE.USER.TRAINED User training The responsible manager of MFP shall train users according to the guidance document and ensure that users are aware of the security policies and procedures of their organisation and have the competence to follow those policies and procedures. OE.ADMIN.TRAINED Administrator training The responsible manager of MFP shall ensure that administrators are aware of the security policies and procedures of their organisation; have the training, competence, and time to follow the guidance document; and correctly configure and operate the TOE according to those policies and procedures. OE.ADMIN.TRUSTED Trusted administrator The responsible manager of MFP shall select administrators who will not use their privileged access rights for malicious purposes according to the guidance document. OE.AUDIT.REVIEWED Log audit The responsible manager of MFP shall ensure that audit logs are reviewed at appropriate intervals according to the guidance document for detecting security violations or unusual patterns of activity. Page 36 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 4.3 Security Objectives Rationale This section describes the rationale for security objectives. The security objectives are for upholding the assumptions, countering the threats, and enforcing the organisational security policies that are defined. 4.3.1 Correspondence Table of Security Objectives Table 7 describes the correspondence between the assumptions, threats and organisational security policies, and each security objective. Table 7 : Rationale for Security Objectives O.DOC.NO_DIS O.DOC.NO_ALT O.FUNC.NO_ALT O.PROT.NO_ALT O.CONF.NO_DIS O.CONF.NO_ALT O.USER.AUTHORIZED OE.USER.AUTHORIZED O.SOFTWARE.VERIFIED O.AUDIT.LOGGED OE.AUDIT_STORAGE.PROTCTED OE.AUDIT_ACCESS_AUTHORIZED OE.AUDIT.REVIEWED O.INTERFACE.MANAGED OE.PHYSICAL.MANAGED OE.INTERFACE.MANAGED O.STORAGE.ENCRYPTED OE.ADMIN.TRAINED OE.ADMIN.TRUSTED OE.USER.TRAINED T.DOC.DIS X X X T.DOC.ALT X X X T.FUNC.ALT X X X T.PROT.ALT X X X T.CONF.DIS X X X T.CONF.ALT X X X P.USER.AUTHORIZATION X X P.SOFTWARE.VERIFICATION X P.AUDIT.LOGGING X X X X P.INTERFACE.MANAGEMENT X X P.STORAGE.ENCRYPTION X A.ACCESS.MANAGED X A.ADMIN.TRAINING X A.ADMIN.TRUST X A.USER.TRAINING X Page 37 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 4.3.2 Security Objectives Descriptions The following describes the rationale for each security objective being appropriate to satisfy the threats, assumptions and organisational security policies. T.DOC.DIS T.DOC.DIS is countered by O.DOC.NO_DIS, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.DOC.NO_DIS, the TOE protects the documents from unauthorised disclosure by persons without a login user name, or by persons with a login user name but without an access permission to those documents. T.DOC.DIS is countered by these objectives. T.DOC.ALT T.DOC.ALT is countered by O.DOC.NO_ALT, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.DOC.NO_ALT, the TOE protects the documents from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the document. T.DOC.ALT is countered by these objectives. T.FUNC.ALT T.FUNC.ALT is countered by O.FUNC.NO_ALT, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.FUNC.NO_ALT, the TOE protects the user jobs from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the user job. T.FUNC.ALT is countered by these objectives. T.PROT.ALT T.PROT.ALT is countered by O.PROT.NO_ALT, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.PROT.NO_ALT, the TOE protects the TSF protected Page 38 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. data from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the TSF protected data. T.PROT.ALT is countered by these objectives. T.CONF.DIS T.CONF.DIS is countered by O.CONF.NO_DIS, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.CONF.NO_DIS, the TOE protects the TSF confidential data from unauthorised disclosure by persons without a login user name, or by persons with a login user name but without an access permission to the TSF confidential data. T.CONF.DIS is countered by these objectives. T.CONF.ALT T.CONF.ALT is countered by O.CONF.NO_ALT, O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. By O.CONF.NO_ALT, the TOE protects the TSF confidential data from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the TSF confidential data. T.CONF.ALT is countered by these objectives. P.USER.AUTHORIZATION P.USER.AUTHORIZATION is enforced by O.USER.AUTHORIZED and OE.USER.AUTHORIZED. By OE.USER.AUTHORIZED, the responsible manager of MFP gives the authority to use the TOE to users who follow the security policies and procedures of their organisation. By O.USER.AUTHORIZED, the TOE requires identification and authentication of users, and users are authorised in accordance with the security policies before being allowed to use the TOE. P.USER.AUTHORIZATION is enforced by these objectives. P.SOFTWARE.VERIFICATION P.SOFTWARE.VERIFICATION is enforced by O.SOFTWARE.VERIFIED. By O.SOFTWARE.VERIFIED, the TOE provides measures for self-verifying the executable code of the TSF. P.SOFTWARE.VERIFICATION is enforced by this objective. Page 39 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. P.AUDIT.LOGGING P.AUDIT.LOGGING is enforced by O.AUDIT.LOGGED , OE.AUDIT.REVIEWED , O E . A U D I T _ S T O R A G E . P R O T E C T E D a n d O E . A U D I T _ A C C E S S . A U T H O R I Z E D . By O.AUDIT.LOGGED, the TOE creates and maintains a log of TOE use and security-relevant events in the MFP and prevents its unauthorised disclosure or alteration. By OE.AUDIT.REVIEWED, the responsible manager of MFP reviews audit logs at appropriate intervals for security violations or unusual patterns of activity according to the guidance document. By OE.AUDIT_STORAGE.PROTECTED, if audit records are exported from the TOE to another trusted IT product, the responsible manager of MFP protects those records from unauthorised access, deletion and alteration. By OE.AUDIT_ACCESS.AUTHORIZED, the responsible manager of MFP ensures that those records can be accessed in order to detect potential security violations, and only by authorised persons. P.AUDIT.LOGGING is enforced by these objectives. P.INTERFACE.MANAGEMENT P.INTERFACE.MANAGEMENT is enforced by O.INTERFACE.MANAGED and OE.INTERFACE.MANAGED. By O.INTERFACE.MANAGED, the TOE manages the operation of the external interfaces in accordance with the security policies. By OE.INTERFACE.MANAGED, the TOE constructs the IT environment that prevents unmanaged access to TOE external interfaces. P.INTERFACE.MANAGEMENT is enforced by these objectives. P.STORAGE.ENCRYPTION P.STORAGE.ENCRYPTION is enforced by O.STORAGE.ENCRYPTED. By O.STORAGE.ENCRYPTED, the TOE shall encrypt the data to be written on the HDD, and written on the HDD shall be those encrypted data. P.STORAGE.ENCRYPTION is enforced by this objective. A.ACCESS.MANAGED A.ACCESS.MANAGED is upheld by OE.PHYSICAL.MANAGED. By OE.PHYSICAL.MANAGED, the TOE is located in a restricted or monitored environment according to the guidance documents and is protected from the physical access by the unauthorised persons. A.ACCESS.MANAGED is upheld by this objective. A.ADMIN.TRAINING A.ADMIN.TRAINING is upheld by OE.ADMIN.TRAINED. By OE.ADMIN.TRAINED, the responsible manager of MFP ensures that the administrators are aware of the security policies and procedures of their organisation. For this, the administrators have the training, competence, and time to follow the guidance documents, and correctly configure and operate the TOE in accordance with those policies and procedures. A.ADMIN.TRAINING is upheld by this objective. Page 40 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. A.ADMIN.TRUST A.ADMIN.TRUST is upheld by OE.ADMIN.TRUSTED. By OE.ADMIN.TRUSTED, the responsible manager of MFP selects the administrators and they will not abuse their privileges in accordance with the guidance documents. A.ADMIN.TRUST is upheld by this objective. A.USER.TRAINING A.USER.TRAINING is upheld by OE.USER.TRAINED. By OE.USER.TRAINED, the responsible manager of MFP instructs the users in accordance with the guidance documents to make them aware of the security policies and procedures of their organisation, and the users follow those policies and procedures. OE.USER.TRAINED is upheld by this objective. Page 41 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 5 Extended Components Definition This section describes Extended Components Definition. 5.1 Restricted forwarding of data to external interfaces (FPT_FDI_EXP) Family behaviour This family defines requirements for the TSF to restrict direct forwarding of information from one external interface to another external interface. Many products receive information on specific external interfaces and are intended to transform and process this information before it is transmitted on another external interface. However, some products may provide the capability for attackers to misuse external interfaces to violate the security of the TOE or devices that are connected to the TOE's external interfaces. Therefore, direct forwarding of unprocessed data between different external interfaces is forbidden unless explicitly allowed by an authorized administrative role. The family FPT_FDI_EXP has been defined to specify this kind of functionality. Component levelling: FPT_FDI_EXP: Restricted forwarding of data to external interfaces 1 FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces provides for the functionality to require TSF controlled processing of data received over defined external interfaces before these data are sent out on another external interface. Direct forwarding of data from one external interface to another one requires explicit allowance by an authorized administrative role. Management: FPT_FDI_EXP.1 The following actions could be considered for the management functions in FMT: a) Definition of the role(s) that are allowed to perform the management activities b) Management of the conditions under which direct forwarding can be allowed by an administrative role c) Revocation of such an allowance Audit: FPT_FDI_EXP.1 There are no auditable events foreseen. Rationale: Quite often, a TOE is supposed to perform specific checks and process data received on one external interface before such (processed) data are allowed to be transferred to another external interface. Examples Page 42 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. are firewall systems but also other systems that require a specific work flow for the incoming data before it can be transferred. Direct forwarding of such data (i.e., without processing the data first) between different external interfaces is therefore a function that—if allowed at all—can only be allowed by an authorized role. It has been viewed as useful to have this functionality as a single component that allows specifying the property to disallow direct forwarding and require that only an authorized role can allow this. Since this is a function that is quite common for a number of products, it has been viewed as useful to define an extended component. The Common Criteria defines attribute-based control of user data flow in its FDP class. However, in this ST, the authors needed to express the control of both user data and TSF data flow using administrative control instead of attribute-based control. It is considered inappropriate to use FDP_IFF and FDP_IFC by applying refinement for this purpose. Therefore, the authors decided to define an extended component to address this functionality. This extended component protects both user data and TSF data, and it could therefore be placed in either the FDP or the FPT class. Since its purpose is to protect the TOE from misuse, the authors believed that it was most appropriate to place it in the FPT class. It did not fit well in any of the existing families in either class, and this led the authors to define a new family with just one member. FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces Hierarchical to: No other components Dependencies: FMT_SMF.1 Specification of Management Functions FMT_SMR.1 Security roles FPT_FDI_EXP.1.1 The TSF shall provide the capability to restrict data received on [assignment: list of external interfaces] from being forwarded without further processing by the TSF to [assignment: list of external interfaces]. Page 43 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 6 Security Requirements This section describes Security Functional Requirements, Security Assurance Requirements and Security Requirements Rationale. 6.1 Security Functional Requirements This section describes the TOE security functional requirements for fulfilling the security objectives defined in section 4.1. The security functional requirements are quoted from the requirement defined in the CC Part2. The security functional requirements that are not defined in CC Part2 are quoted from the extended security functional requirements defined in the PP. The part with assignment and selection defined in the [CC] is identified with [bold face and brackets]. 6.1.1 Class FAU: Security audit FAU_GEN.1 Audit data generation Hierarchical to: No other components. Dependencies: FPT_STM.1 Reliable time stamps FAU_GEN.1.1 The TSF shall be able to generate an audit record of the following auditable events: a) Start-up and shutdown of the audit functions; b) All auditable events for the [selection: not specified] level of audit; and c) [assignment: auditable events of the TOE shown in Table 8]. FAU_GEN.1.2 The TSF shall record within each audit record at least the following information: a) Date and time of the event, type of event, subject identity (if applicable), and the outcome (success or failure) of the event; and b) For each audit event type, based on the auditable event definitions of the functional components included in the PP/ST, [assignment: types of job for FDP_ACF.1(a), all login user names that attempted the user identification for FIA_UID.1, communication direction of communication by WIM, communication IP address of the communication used for WIM and folder transmission, recipient's e-mail address used for e-mail transmission of attachments, lockout operation type, Locked out User, and Locked out User who is to be released]. Table 8 shows the action (CC rules) recommended by the CC as auditable for each functional requirement and the corresponding auditable events of the TOE. Page 44 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 8 : List of Auditable Events Functional Requirements Actions Which Should Be Auditable Auditable Events FDP_ACF.1(a) a) Minimal: Successful requests to perform an operation on an object covered by the SFP. b) Basic: All requests to perform an operation on an object covered by the SFP. c) Detailed: The specific security attributes used in making an access check. Original: - Start and end operation of creating document data. - Start and end operation of printing document data. - Start and end operation of downloading document data. - Start and end operation of faxing document data. - Start and end operation of sending document data as attachments by e-mail. - Start and end operation of sending document data to folder. - Start and end operation of deleting document data. Those described above, "creating, printing, downloading, faxing, sending attachments by e-mail, sending to folder, and deleting", are the job types of additional information that are required by the PP. FDP_ACF.1(b) a) Minimal: Successful requests to perform an operation on an object covered by the SFP. b) Basic: All requests to perform an operation on an object covered by the SFP. c) Detailed: The specific security attributes used in making an access check. Original: Not recorded. FIA_AFL.1 a) Minimal: the reaching of the threshold for the unsuccessful authentication attempts and the actions (e.g. disabling of a terminal) taken and the subsequent, if appropriate, restoration to the normal state (e.g. re-enabling of a terminal). a) Minimal: Starting and releasing lockout FIA_UAU.1 a) Minimal: Unsuccessful use of the authentication mechanism; b) Basic: All use of the authentication mechanism; c) Detailed: All TSF mediated actions performed before authentication of the user. b) Basic: Success and failure of login operation Page 45 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Functional Requirements Actions Which Should Be Auditable Auditable Events FIA_UID.1 a) Minimal: Unsuccessful use of the user identification mechanism, including the user identity provided; b) Basic: All use of the user identification mechanism, including the user identity provided. b) Basic: Success and failure of login operation. Also includes the user identification that is required by the PP as the additional information. FMT_SMF.1 a) Minimal: Use of the management functions. a) Minimal: Record of management items in Table 26. FMT_SMR.1 a) Minimal: modifications to the group of users that are part of a role; b) Detailed: every use of the rights of a role. No record due to no modification. FPT_STM.1 a) Minimal: changes to the time; b) Detailed: providing a timestamp. a) Minimal: Settings of Year-Month-Day and Hour-Minute FTA_SSL.3 a) Minimal: Termination of an interactive session by the session locking mechanism. a) Minimal: Termination of session by auto logout. FTP_ITC.1 a) Minimal: Failure of the trusted channel functions. b) Minimal: Identification of the initiator and target of failed trusted channel functions. c) Basic: All attempted uses of the trusted channel functions. d) Basic: Identification of the initiator and target of all trusted channel functions. a) Minimal: Failure of communication with trusted channel. FAU_GEN.2 User identity association Hierarchical to: No other components. Dependencies: FAU_GEN.1 Audit data generation FIA_UID.1 Timing of identification FAU_GEN.2.1 For audit events resulting from actions of identified users, the TSF shall be able to associate each auditable event with the identity of the user that caused the event. FAU_STG.1 Protected audit trail storage Hierarchical to: No other components. Dependencies: FAU_GEN.1 Audit data generation FAU_STG.1.1 The TSF shall protect the stored audit records in the audit trail from unauthorised deletion. FAU_STG.1.2 The TSF shall be able to [selection: prevent] unauthorised modifications to the stored audit records in the audit trail. FAU_STG.4 Prevention of audit data loss Hierarchical to: FAU_STG.3 Action in case of possible audit data loss Page 46 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Dependencies: FAU_STG.1 Protected audit trail storage FAU_STG.4.1 The TSF shall [selection: overwrite the oldest stored audit records] and [assignment: no other actions to be taken in case of audit storage failure] if the audit trail is full. FAU_SAR.1 Audit review Hierarchical to: No other components. Dependencies: FAU_GEN.1 Audit data generation FAU_SAR.1.1 The TSF shall provide [assignment: the MFP administrators] with the capability to read [assignment: all of log items] from the audit records. FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the user to interpret the information. FAU_SAR.2 Restricted audit review Hierarchical to: No other components. Dependencies: FAU_SAR.1 Audit review FAU_SAR.2.1 The TSF shall prohibit all users read access to the audit records, except those users that have been granted explicit read-access. 6.1.2 Class FCS: Cryptographic support FCS_CKM.1 Cryptographic key generation Hierarchical to: No other components. Dependencies: [FCS_CKM.2 Cryptographic key distribution, or FCS_COP.1 Cryptographic operation] FCS_CKM.4 Cryptographic key destruction FCS_CKM.1.1 The TSF shall generate cryptographic keys in accordance with a specified cryptographic key generation algorithm [assignment: cryptographic key generation algorithm in Table 9] and specified cryptographic key sizes [assignment: cryptographic key sizes in Table 9] that meet the following: [assignment: standards in Table 9]. Table 9 : List of Cryptographic Key Generation Key Type Standard Cryptographic Key Generation Algorithm Cryptographic Key Size HDD cryptographic key NIST SP 800-90 HMAC_DRBG(SHA-1) 256 bits FCS_COP.1 Cryptographic operation Hierarchical to: No other components. Dependencies: [FDP_ITC.1 Import of user data without security attributes, or FDP_ITC.2 Import of user data with security attributes, or Page 47 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [assignment: cryptographic operations shown in Table 10] in accordance with a specified cryptographic algorithm [assignment: cryptographic algorithm shown in Table 10] and cryptographic key sizes [assignment: cryptographic key sizes shown in Table 10] that meet the following: [assignment: standards shown in Table 10]. Table 10 : List of Cryptographic Operation Key Type Standard Cryptographic Algorithm Cryptographic Key Size Cryptographic Operation HDD cryptographic key FIPS197 AES 256 bits - Encryption when writing the data on HDD - Decryption when reading the data from HDD 6.1.3 Class FDP: User data protection FDP_ACC.1(a) Subset access control Hierarchical to: No other components. Dependencies: FDP_ACF.1 Security attribute based access control FDP_ACC.1.1(a) The TSF shall enforce the [assignment: document access control SFP] on [assignment: list of subjects, objects, and operations among subjects and objects in Table 11]. Table 11 : List of Subjects, Objects, and Operations among Subjects and Objects (a) Subjects - Normal user process - MFP administrator process - Supervisor process Objects - Document data - User jobs Operations - Read - Delete FDP_ACC.1(b) Subset access control Hierarchical to: No other components. Dependencies: FDP_ACF.1 Security attribute based access control FDP_ACC.1.1(b) The TSF shall enforce the [assignment: TOE function access control SFP] on [assignment: list of subjects, objects, and operations among subjects and objects in Table 12]. Page 48 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 12 : List of Subjects, Objects, and Operations among Subjects and Objects (b) Subjects - Normal user process - Supervisor process Object - MFP application Operation - Execute FDP_ACF.1(a) Security attribute based access control Hierarchical to: No other components. Dependencies: FDP_ACC.1 Subset access control FMT_MSA.3 Static attribute initialisation FDP_ACF.1.1(a) The TSF shall enforce the [assignment: document access control SFP] to objects based on the following: [assignment: subjects or objects, and their corresponding security attributes shown in Table 13]. Table 13 : Subjects, Objects and Security Attributes (a) Category Subjects or Objects Security Attributes Subject Normal user process - Login user name of normal user - User role Subject MFP administrator process - User role Subject Supervisor process - User role Object Document data - Document data attribute - Document user list Object User job - Login user name of normal user FDP_ACF.1.2(a) The TSF shall enforce the following rules to determine if an operation among controlled subjects and controlled objects is allowed: [assignment: rules to control operations among subjects and objects shown in Table 14]. Table 14 : Rules to Control Operations on Document Data and User Jobs (a) Objects Document Data Attributes Operations Subjects Rules to control Operations Document data +PRT Delete Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +PRT Read Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Page 49 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Objects Document Data Attributes Operations Subjects Rules to control Operations Document data +SCN Delete Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +SCN Read Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +FAXOUT Delete Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +FAXOUT Read Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +FAXIN Delete Normal user process Not allowed. However, it is allowed for normal user process with login user name of normal user registered on document user list for document data. Document data +FAXIN Read Normal user process Not allowed. However, it is allowed for normal user process with login user name of normal user registered on document user list for document data. Document data +CPY Delete Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +CPY Read Normal user process Not allowed. However, it is allowed for normal user process that created the document data. Document data +DSR Delete Normal user process Not allowed. However, it is allowed for normal user process with login user name of normal user registered on document user list for document data. Document data +DSR Read Normal user process Not allowed. However, it is allowed for normal user process with login user name of normal user registered on document user list for document data. User jobs No setting of document data attribute Delete Normal user process Not allowed. However, it is allowed for normal user process with login user name of normal user, which is the security attribute of user jobs. User jobs No setting of document data attribute Modify Normal user process Not allowed. Page 50 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FDP_ACF.1.3(a) The TSF shall explicitly authorise access of subjects to objects based on the following additional rules: [assignment: rules to control operations among subjects and objects shown in Table 15]. Table 15 : Additional Rules to Control Operations on Document Data and User Jobs (a) Objects Document Data Attributes Operations Subjects Rules to control Operations Document data +PRT Delete MFP administrator process Allows. Document data +FAXIN Delete MFP administrator process Allows. Document data +DSR Delete MFP administrator process Allows. User jobs No setting of document data attribute Delete MFP administrator process Allows. FDP_ACF.1.4(a) The TSF shall explicitly deny access of subjects to objects based on the following additional rules: [assignment: deny the operations on the document data and user jobs in case of supervisor process]. FDP_ACF.1(b) Security attribute-based access control Hierarchical to: No other components. Dependencies: FDP_ACC.1 Subset access control FMT_MSA.3 Static attribute initialisation FDP_ACF.1.1(b) The TSF shall enforce the [assignment: TOE function access control SFP] to objects based on the following: [assignment: subjects or objects, and their corresponding security attributes shown in Table 16]. Table 16 : Subjects, Objects and Security Attributes (b) Category Subjects or Objects Security Attributes Subject Normal user process - Login user name of normal user - Available function list - User role Supervisor process - User role Object MFP application - Function type Page 51 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FDP_ACF.1.2(b) The TSF shall enforce the following rules to determine if an operation among controlled subjects and controlled objects is allowed: [assignment: rule to control operations among objects and subjects shown in Table 17]. Table 17 : Rule to Control Operations on MFP Applications (b) Object Operation Subject Rule to control Operations MFP application Execute Normal user process Allows executing MFP application which MFP administrator allowed in available function list for normal user process. FDP_ACF.1.3(b) The TSF shall explicitly authorise access of subjects to objects based on the following additional rules: [assignment: rules that the Fax Reception Function operated using administrator permission is surely permitted]. FDP_ACF.1.4(b) The TSF shall explicitly deny access of subjects to objects based on the following additional rules: [assignment: deny an operation on MFP application in case of supervisor process]. FDP_RIP.1 Subset residual information protection Hierarchical to: No other components. Dependencies: No dependencies. FDP_RIP.1.1 The TSF shall ensure that any previous information content of a resource is made unavailable upon the [selection: deallocation of the resource from] the following objects: [assignment: user documents]. 6.1.4 Class FIA: Identification and authentication FIA_AFL.1 Authentication failure handling Hierarchical to: No other components. Dependencies: FIA_UAU.1 Timing of authentication FIA_AFL.1.1 The TSF shall detect when [selection: an administrator configurable positive integer within [assignment: 1 to 5]] unsuccessful authentication attempts occur related to [assignment: the authentication events shown in Table 18]. Table 18 : List of Authentication Events Authentication Events User authentication using the Operation Panel User authentication using WIM from the client computer User authentication when printing from the client computer User authentication when using LAN Fax from client computer Page 52 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has been [selection: met], the TSF shall [assignment: perform actions shown in Table 19]. Table 19 : List of Actions for Authentication Failure Unsuccessfully Authenticated Users Actions for Authentication Failure Normal user The lockout for the normal user is released by the lockout time set by the MFP administrator, or release operation by the MFP administrator. Supervisor The lockout for a supervisor is released by the lockout time set by the MFP administrator, release operation by the MFP administrator, or elapse of a given time after the TOE's restart. MFP administrator The lockout for the MFP administrator is released by the lockout time set by the MFP administrator, release operation by a supervisor, or elapse of a given time after the TOE's restart. FIA_ATD.1 User attribute definition Hierarchical to: No other components. Dependencies: No dependencies. FIA_ATD.1.1 The TSF shall maintain the following list of security attributes belonging to individual users: [assignment: the security attributes listed in Table 20 for each user in Table 20]. Table 20 : List of Security Attributes for Each User That Shall Be Maintained Users List of Security Attributes Normal user - Login user name of normal user - User role - Available function list Supervisor - User role MFP administrator - Login user name of MFP administrator - User role FIA_SOS.1 Verification of secrets Hierarchical to: No other components. Dependencies: No dependencies. FIA_SOS.1.1 The TSF shall provide a mechanism to verify that secrets meet [assignment: the following quality metrics]. (1) Usable character and types: Upper-case letters: [A-Z] (26 letters) Lower-case letters: [a-z] (26 letters) Numbers: [0-9] (ten digits) Symbols: SP (spaces) ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~ (33 symbols) Page 53 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. (2) Registrable password length: For normal users: No fewer than the minimum character number specified by MFP administrator (8-32 characters) and no more than 128 characters. For MFP administrators and a supervisor: No fewer than the minimum character number specified by MFP administrator (8-32 characters) and no more than 32 characters. (3) Rule: Passwords that are composed of a combination of characters based on the password complexity setting specified by the MFP administrator can be registered. The MFP administrator specifies either Level 1 or Level 2 for password complexity setting. FIA_UAU.1 Timing of authentication Hierarchical to: No other components. Dependencies: FIA_UID.1 Timing of identification FIA_UAU.1.1 The TSF shall allow [assignment: the viewing of the list of user jobs, WIM Help, system status, counter and information of inquiries, and execution of fax reception] on behalf of the user to be performed before the user is authenticated. FIA_UAU.1.2 The TSF shall require each user to be successfully authenticated before allowing any other TSF-mediated actions on behalf of that user. FIA_UAU.7 Protected authentication feedback Hierarchical to: No other components. Dependencies: FIA_UAU.1 Timing of authentication FIA_UAU.7.1 The TSF shall provide only [assignment: displaying dummy letters as authentication feedback on the Operation Panel] to the user while the authentication is in progress. FIA_UID.1 Timing of identification Hierarchical to: No other components. Dependencies: No dependencies. FIA_UID.1.1 The TSF shall allow [assignment: the viewing of the list of user jobs, WIM Help, system status, counter and information of inquiries, and execution of fax reception] on behalf of the user to be performed before the user is identified. FIA_UID.1.2 The TSF shall require each user to be successfully identified before allowing other TSF-mediated actions on behalf of that user. FIA_USB.1 User-subject binding Hierarchical to: No other components. Dependencies: FIA_ATD.1 User attribute definition FIA_USB.1.1 The TSF shall associate the following user security attributes with subjects acting on the behalf of that user: [assignment: login user name of normal user, login user name of MFP administrator, available function list, and user role]. Page 54 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FIA_USB.1.2 The TSF shall enforce the following rules on the initial association of user security attributes with subjects acting on the behalf of users: [assignment: rules for the initial association of attributes listed in Table 21]. Table 21 : Rules for Initial Association of Attributes Users Subjects User Security Attributes Normal user Normal user process - Login user name of normal user - User role - Available function list Supervisor Supervisor process - User role MFP administrator MFP administrator process - Login user name of MFP administrator - User role FIA_USB.1.3 The TSF shall enforce the following rules governing changes to the user security attributes associated with subjects acting on the behalf of users: [assignment: none]. 6.1.5 Class FMT: Security management FMT_MSA.1(a)Management of security attributes Hierarchical to: No other components. Dependencies: [FDP_ACC.1 Subset access control, or FDP_IFC.1 Subset information flow control] FMT_SMR.1 Security roles FMT_SMF.1 Specification of Management Function FMT_MSA.1.1(a)The TSF shall enforce the [assignment: document access control SFP] to restrict the ability to [selection: query, modify, delete, [assignment: newly create]] the security attributes [assignment: security attributes in Table 22] to [assignment: the user roles with operation permission in Table 22]. Table 22 : User Roles for Security Attributes (a) Security Attributes Operations User Roles with Operation Permission Login user name of normal user Query, modify, delete, newly create MFP administrator Query Normal user who owns the applicable login user name Login user name of supervisor Query, modify Supervisor Page 55 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Security Attributes Operations User Roles with Operation Permission Login user name of MFP administrator Newly create MFP administrator Query, modify MFP administrator who owns the applicable login user name Query Supervisor Document data attribute No operation permitted None Document user list [when document data attributes are (+PRT), (+SCN), (+CPY), and (+FAXOUT)] No operation permitted None Document user list [when document data attribute is (+DSR)] Query, modify MFP administrator, applicable normal user who created the document data Document user list [when document data attribute is (+FAXIN)] Query, modify MFP administrator FMT_MSA.1(b)Management of security attributes Hierarchical to: No other components. Dependencies: [FDP_ACC.1 Subset access control, or FDP_IFC.1 Subset information flow control] FMT_SMR.1 Security roles FMT_SMF.1 Specification of Management Function FMT_MSA.1.1(b)The TSF shall enforce the [assignment: TOE function access control SFP] to restrict the ability to [selection: query, modify, delete, [assignment: newly create]] the security attributes [assignment: security attributes in Table 23] to [assignment: the user roles with operation permission in Table 23]. Table 23 : User Roles for Security Attributes (b) Security Attributes Operations User Roles with operation permission Login user name of normal user Query, modify, delete, newly create MFP administrator Query Normal user who owns the applicable login user name Available function list Query, modify MFP administrator Query Applicable normal user Function type No operation permitted None Page 56 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Security Attributes Operations User Roles with operation permission User role No operation permitted None FMT_MSA.3(a)Static attribute initialisation Hierarchical to: No other components. Dependencies: FMT_MSA.1 Management of security attributes FMT_SMR.1 Security roles FMT_MSA.3.1(a)The TSF shall enforce the [assignment: document access control SFP] to provide [selection: restrictive] default values for security attributes that are used to enforce the SFP. FMT_MSA.3.2(a)The TSF shall allow the [assignment: authorised identified roles shown in Table 24] to specify alternative initial values to override the default values when an object or information is created. Table 24 : Authorised Identified Roles Allowed to Override Default Values Objects Security Attributes Authorised Identified Roles Document data Document data attribute No authorised identified roles Document data [when document data attribute is (+DSR)] Document user list MFP administrator Document data [when document data attributes are (+PRT), (+SCN), (+CPY), (+FAXIN), and (+FAXOUT)] Document user list No authorised identified roles User job Login user name of normal user No authorised identified roles FMT_MSA.3(b) Static attribute initialisation Hierarchical to: No other components. Dependencies: FMT_MSA.1 Management of security attributes FMT_SMR.1 Security roles FMT_MSA.3.1(b)The TSF shall enforce the [assignment: TOE function access control SFP] to provide [selection: restrictive] default values for security attributes that are used to enforce the SFP. FMT_MSA.3.2(b)The TSF shall allow the [assignment: no authorised identified roles] to specify alternative initial values to override the default values when an object or information is created. FMT_MTD.1 Management of TSF data Hierarchical to: No other components. Page 57 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Dependencies: FMT_SMR.1 Security roles FMT_SMF.1 Specification of Management Functions FMT_MTD.1.1 The TSF shall restrict the ability to [selection: query, modify, delete, [assignment: newly create]] the [assignment: list of TSF data in Table 25] to [assignment: the user roles in Table 25]. Table 25 : List of TSF Data TSF Data Operations User Roles Login password of normal user Newly create, modify MFP administrator Modify Normal user who owns the login password Login password of supervisor Modify Supervisor Login password of MFP administrator Modify Supervisor Newly create MFP administrator Modify MFP administrator who owns the login password Number of Attempts before Lockout Query, modify MFP administrator Setting for Lockout Release Timer Query, modify MFP administrator Lockout time Query, modify MFP administrator Date setting (year, month, day), time setting (hour, minute) Query, modify MFP administrator Query Supervisor, normal user Minimum character number Query, modify MFP administrator Password complexity setting Query, modify MFP administrator Operation Panel auto logout time Query, modify MFP administrator WIM auto logout time Query, modify MFP administrator Audit logs Query, delete MFP administrator HDD cryptographic key Newly create MFP administrator S/MIME user information Newly create, modify, query, delete MFP administrator Query Normal user Destination information for folder transmission Newly create, modify, query, delete MFP administrator Query Normal user Stored Reception File User Query, modify MFP administrator User authentication method Query MFP administrator Page 58 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. TSF Data Operations User Roles IPsec setting information Query, modify MFP administrator Device Certificate Modify MFP administrator FMT_SMF.1 Specification of Management Functions Hierarchical to: No other components. Dependencies: No dependencies. FMT_SMF.1.1 The TSF shall be capable of performing the following management functions: [assignment: management functions shown in Table 26]. Table 26 : List of Specification of Management Functions Management Functions New creation, query, modification, and deletion of the login user name of normal user by MFP administrator Query of own login user name by normal user Query and modification of login user name of supervisor by supervisor New creation of login user name of MFP administrator by MFP administrator Query and modification of own login user name by MFP administrator Query of login user name of MFP administrator by supervisor New creation and modification of login password of normal user by MFP administrator Modification of own login password by normal user Modification of login password of supervisor by supervisor Modification of login password of MFP administrator by supervisor New creation of login password of MFP administrator by MFP administrator Modification of own login password by MFP administrator Query and modification of minimum character number by MFP administrator Query and modification of Password Complexity by MFP administrator Query and modification of Operation Panel auto logout time by MFP administrator Query and modification of WIM auto logout time by MFP administrator Query and modification of Number of Attempts before Lockout by MFP administrator Query and modification of Lockout Release Timer Setting by MFP administrator Query and modification of lockout time by MFP administrator Query and modification of document user list by MFP administrator Query and modification of document user list by the normal user who created the document Query and modification of available function list by MFP administrator Query of own available function list by normal user Query and modification of default values of the document user list by MFP administrator Query and modification of date and time by MFP administrator Page 59 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Management Functions Query of date and time by supervisor Query of date and time by normal user Query and deletion of audit logs by MFP administrator New creation of HDD encryption key by MFP administrator New creation, query, modification and deletion of S/MIME user information by MFP administrator Query of S/MIME user information by normal user New creation, query, modification and deletion of destination information for folder transmission by MFP administrator Query of destination information for folder transmission by normal user Query and modification of Stored Reception File User by MFP administrator Query of user authentication method by MFP administrator Query and modification of IPsec setting information by MFP administrator Modification of Device Certificate by MFP administrator FMT_SMR.1 Security roles Hierarchical to: No other components. Dependencies: FIA_UID.1 Timing of identification FMT_SMR.1.1 The TSF shall maintain the roles [assignment: normal user, supervisor, and MFP administrator]. FMT_SMR.1.2 The TSF shall be able to associate users with roles. 6.1.6 Class FPT: Protection of the TSF FPT_STM.1 Reliable time stamps Hierarchical to: No other components. Dependencies: No dependencies. FPT_STM.1.1 The TSF shall be able to provide reliable time stamps. FPT_TST.1 TSF testing Hierarchical to: No other components. Dependencies: No dependencies. FPT_TST.1.1 The TSF shall run a suite of self tests [selection: during initial start-up] to demonstrate the correct operation of [selection: [assignment: the MFP Control Software, FCU Control Software, and Operation Panel Control Software]]. FPT_TST.1.2 The TSF shall provide authorised users with the capability to verify the integrity of [selection: [assignment: the audit log data file]]. FPT_TST.1.3 The TSF shall provide authorised users with the capability to verify the integrity of [selection: [assignment: the stored TSF executable code]]. Page 60 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces Hierarchical to: No other components. Dependencies: FMT_SMF.1 Specification of Management Functions FMT_SMR.1 Security roles FPT_FDI_EXP.1.1 The TSF shall provide the capability to restrict data received on [assignment: the Operation Panel, LAN, telephone line] from being forwarded without further processing by the TSF to [assignment: the LAN and telephone line]. 6.1.7 Class FTA: TOE access FTA_SSL.3 TSF-initiated termination Hierarchical to: No other components. Dependencies: No dependencies. FTA_SSL.3.1 The TSF shall terminate an interactive session after a [assignment: lapse of Operation Panel auto logout time, lapse of WIM auto logout time, completion of document data reception from the printer driver, and completion of document data reception from the fax driver]. 6.1.8 Class FTP: Trusted path/channels FTP_ITC.1 Inter-TSF trusted channel Hierarchical to: No other components. Dependencies: No dependencies. FTP_ITC.1.1 The TSF shall provide a communication channel between itself and another trusted IT product that is logically distinct from other communication channels and provides assured identification of its end points and protection of the channel data from modification or disclosure. FTP_ITC.1.2 The TSF shall permit [selection: the TSF, another trusted IT product] to initiate communication via the trusted channel. FTP_ITC.1.3 The TSF shall initiate communication via the trusted channel for [assignment: communication via the LAN of document data, function data, protected data, and confidential data]. 6.2 Security Assurance Requirements The evaluation assurance level of this TOE is EAL2+ALC_FLR.2. Table 27 lists the assurance components of the TOE. ALC_FLR.2 was added to the set of components defined in evaluation assurance level 2 (EAL2). Table 27 : TOE Security Assurance Requirements (EAL2+ALC_FLR.2) Assurance Classes Assurance Components ADV: ADV_ARC.1 Security architecture description Page 61 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Assurance Classes Assurance Components Development ADV_FSP.2 Security-enforcing functional specification ADV_TDS.1 Basic design AGD: Guidance documents AGD_OPE.1 Operational user guidance AGD_PRE.1 Preparative procedures ALC: Life-cycle support ALC_CMC.2 Use of a CM system ALC_CMS.2 Parts of the TOE CM coverage ALC_DEL.1 Delivery procedures ALC_FLR.2 Flaw reporting procedures ASE: Security Target evaluation ASE_CCL.1 Conformance claims ASE_ECD.1 Extended components definition ASE_INT.1 ST introduction ASE_OBJ.2 Security objectives ASE_REQ.2 Derived security requirements ASE_SPD.1 Security problem definition ASE_TSS.1 TOE summary specification ATE: Tests ATE_COV.1 Evidence of coverage ATE_FUN.1 Functional testing ATE_IND.2 Independent testing - sample AVA: Vulnerability assessment AVA_VAN.2 Vulnerability analysis 6.3 Security Requirements Rationale This section describes the rationale for security requirements. If all security functional requirements are satisfied as below, the security objectives defined in "4 Security Objectives" are fulfilled. 6.3.1 Tracing Table 28 shows the relationship between the TOE security functional requirements and TOE security objectives. Table 28 shows that each TOE security functional requirement fulfils at least one TOE security objective. Page 62 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 28 : Relationship between Security Objectives and Functional Requirements O.DOC.NO_DIS O.DOC.NO_ALT O.FUNC.NO_ALT O.PROT.NO_ALT O.CONF.NO_DIS O.CONF.NO_ALT O.USER.AUTHORIZED O.INTERFACE.MANAGED O.SOFTWARE.VERIFIED O.AUDIT.LOGGED O.STORAGE.ENCRYPTED FAU_GEN.1 X FAU_GEN.2 X FAU_STG.1 X FAU_STG.4 X FAU_SAR.1 X FAU_SAR.2 X FCS_CKM.1 X FCS_COP.1 X FDP_ACC.1(a) X X X FDP_ACC.1(b) X FDP_ACF.1(a) X X X FDP_ACF.1(b) X FDP_RIP.1 X X FIA_AFL.1 X FIA_ATD.1 X FIA_SOS.1 X FIA_UAU.1 X X FIA_UAU.7 X FIA_UID.1 X X FIA_USB.1 X FPT_FDI_EXP.1 X FMT_MSA.1(a) X X X FMT_MSA.1(b) X FMT_MSA.3(a) X X X FMT_MSA.3(b) X FMT_MTD.1 X X X X FMT_SMF.1 X X X X FMT_SMR.1 X X X X Page 63 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. O.DOC.NO_DIS O.DOC.NO_ALT O.FUNC.NO_ALT O.PROT.NO_ALT O.CONF.NO_DIS O.CONF.NO_ALT O.USER.AUTHORIZED O.INTERFACE.MANAGED O.SOFTWARE.VERIFIED O.AUDIT.LOGGED O.STORAGE.ENCRYPTED FPT_STM.1 X FPT_TST.1 X FTA_SSL.3 X X FTP_ITC.1 X X X X X X 6.3.2 Justification of Traceability This section describes below how the TOE security objectives are fulfilled by the TOE security functional requirements corresponding to the TOE security objectives. O.DOC.NO_DIS Protection of document disclosure O.DOC.NO_DIS is the security objective to prevent the documents from unauthorised disclosure by persons without a login user name, or by persons with a login user name but without an access permission to the document. To fulfil this security objective, it is required to implement the following countermeasures. (1) Specify and implement the access control to the document data. FDP_ACC.1(a) and FDP_ACF.1(a) only allow the following persons to view document data according to the document data attributes: the normal user who generated the document data or the normal user who is registered on the document user list of the document data. The MFP administrator and supervisor are not allowed to view document data. (2) Prevent reading the deleted documents, temporary documents and their fragments. Deleted documents, temporary documents and their fragments are prevented from being read by FDP_RIP.1. (3) Use trusted channels for sending or receiving document data. The document data sent and received by the TOE via the LAN are protected by FTP_ITC.1. (4) Management of the security attributes. FMT_MSA.1(a) specifies the available operations (newly create, query, modify and delete) on the login user name, and available operations (query and modify) on the document user list, and a specified user is thus restricted to perform each operation. FMT_MSA.3(a) surely sets the restrictive value to the security attributes of document data (object) when document data are generated. Page 64 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. By satisfying FDP_ACC.1(a), FDP_ACF.1(a), FDP_RIP.1, FTP_ITC.1, FMT_MSA.1(a) and FMT_MSA.3(a), which are the security functional requirements for these countermeasures, O.DOC.NO_DIS is fulfilled. O.DOC.NO_ALT Protection of document alteration O.DOC.NO_ALT is the security objective to prevent the documents from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the document. To fulfil this security objective, it is required to implement the following countermeasures. (1) Specify and implement the access control to document data. FDP_ACC.1(a) and FDP_ACF.1(a) allow the following persons to delete document data (there is no "editing operation" of document data) according to the document data attributes: the normal user who generated the document data, the normal user who is registered in the document user list of the document data, and the MFP administrator. The supervisor is not allowed to delete document data. (2) Prevent deleting the deleted documents, temporary documents and their fragments. Deleted documents, temporary documents and their fragments are prevented from being used by FDP_RIP.1. (3) Use trusted channels for sending or receiving document data. The document data sent and received by the TOE via the LAN interface are protected by FTP_ITC.1. (4) Management of the security attributes. FMT_MSA.1(a) specifies the available operations (newly create, query, modify and delete) on the login user name, and available operations (query and modify) on the document user list, and a specified user is thus restricted to perform each operation. FMT_MSA.3(a) surely sets the restrictive value to the security attributes of document data (object) when the document data are generated. By satisfying FDP_ACC.1(a), FDP_ACF.1(a), FDP_RIP.1, FTP_ITC.1, FMT_MSA.1(a) and FMT_MSA.3(a), which are the security functional requirements for these countermeasures, O.DOC.NO_ALT is fulfilled. O.FUNC.NO_ALT Protection of user job alteration O.FUNC.NO_ALT is the security objective to prevent the user jobs from unauthorised alteration by persons without a login user name, or by persons with a login user name but without an access permission to the user job. To fulfil this security objective, it is required to implement the following countermeasures. (1) Specify and implement the access control to user jobs. FDP_ACC.1(a) and FDP_ACF.1(a) allow the MFP administrator to delete user jobs, and the normal user with the permission to delete the applicable user job. The supervisor is not allowed to delete user jobs. Deletion is the only modification operation on this TOE's user jobs. (2) Use trusted channels for sending or receiving user jobs. The user jobs sent and received by the TOE via the LAN are protected by FTP_ITC.1. (3) Management of the security attributes. FMT_MSA.1(a) restricts each available operation (newly create, query, modify and delete) for the login user name to specified users only. Page 65 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FMT_MSA.3(a) sets the restrictive value to the security attributes of user jobs (object) when the user jobs are generated. By satisfying FDP_ACC.1(a), FDP_ACF.1(a), FTP_ITC.1, FMT_MSA.1(a) and FMT_MSA.3(a), which are the security functional requirements for these countermeasures, O.FUNC.NO_ALT is fulfilled. O.PROT.NO_ALT Protection of TSF protected data alteration O.PROT.NO_ALT is the security objective to allow only users who can maintain the security to alter the TSF protected data. To fulfil this security objective, it is required to implement the following countermeasures. (1) Management of the TSF protected data. By FMT_MTD.1, only the MFP administrator is allowed to manage the minimum character number, password complexity setting, Number of Attempts before Lockout, settings for Lockout Release Timer, lockout time, date, time, S/MIME user information, destination folder, Stored Reception File User, IPsec setting information, Device Certificate, Operation Panel auto logout time, WIM auto logout time, and user authentication method. (2) Specification of the Management Function. FMT_SMF.1 performs the required Management Functions for Security Function. (3) Specification of the roles. FMT_SMR.1 maintains the users who have the privileges. (4) Use trusted channels for sending or receiving the TSF protected data. The TSF protected data sent and received by the TOE via the LAN are protected by FTP_ITC.1. By satisfying FMT_MTD.1, FMT_SMF.1, FMT_SMR.1 and FTP_ITC.1, which are the security functional requirements for these countermeasures, O.PROT.NO_ALT is fulfilled. O.CONF.NO_DIS Protection of TSF confidential data disclosure O.CONF.NO_DIS is the security objective to allow only users who can maintain the security to disclose the TSF confidential data. To fulfil this security objective, it is required to implement the following countermeasures. (1) Management of the TSF confidential data. FMT_MTD.1 allows the MFP administrator and applicable normal user to operate the login password of normal user. A supervisor is allowed to operate the login password of supervisor. The supervisor and applicable MFP administrator are allowed to operate the login password of the MFP administrator. The MFP administrator is only allowed to operate the audit log and HDD cryptographic key. (2) Specification of the Management Function. FMT_SMF.1 performs the required Management Functions for Security Function. (3) Specification of the roles. FMT_SMR.1 maintains the users who have the privileges. (4) Use trusted channels for sending or receiving TSF confidential data. The TSF confidential data sent and received by the TOE via the LAN are protected by FTP_ITC.1. By satisfying FMT_MTD.1, FMT_SMF.1, FMT_SMR.1 and FTP_ITC.1, which are the security functional requirements for these countermeasures, O.CONF.NO_DIS is fulfilled. Page 66 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. O.CONF.NO_ALT Protection of TSF confidential data alteration O.CONF.NO_ALT is the security objective to allow only users who can maintain the security to alter the TSF confidential data. To fulfil this security objective, it is required to implement the following countermeasures. (1) Management of the TSF confidential data. FMT_MTD.1 allows the MFP administrator and applicable normal user to operate the login password of normal user. A supervisor is allowed to operate the login password of supervisor. The supervisor and applicable MFP administrator are allowed to operate the login password of the MFP administrator. The MFP administrator is only allowed to operate the audit log and newly create an HDD cryptographic key. (2) Specification of the Management Function. FMT_SMF.1 performs the required Management Functions for Security Function. (3) Specification of the roles. FMT_SMR.1 maintains the users who have the privileges. (4) Use trusted channels for sending or receiving TSF confidential data. The TSF confidential data sent and received by the TOE via the LAN are protected by FTP_ITC.1. By satisfying FMT_MTD.1, FMT_SMF.1, FMT_SMR.1 and FTP_ITC.1, which are the security functional requirements for these countermeasures, O.CONF.NO_ALT is fulfilled. O.USER.AUTHORIZED User identification and authentication O.USER.AUTHORIZED is the security objective to restrict users in accordance with the security policies so that only valid users can use the TOE functions. As for normal users, the MFP administrator, and a supervisor, who all access the TOE from the Operation Panel or from the client PC over a network, the security policies of the authentication failure handling and verification of secrets need to be augmented. To fulfil this security objective, it is required to implement the following countermeasures. (1) Identify and authenticate the users prior to the TOE use. FIA_UID.1 and FIA_UAU.1 identify and authenticate the persons who attempt to use the TOE from the Operation Panel or client computer on the network. (2) Allow the successfully identified and authenticated user to use the TOE. FIA_ATD.1 and FIA_USB.1 manage the access procedures to the protected assets of the users who are defined in advance, and associate the users who are successfully identified and authenticated with the access procedures. FDP_ACC.1(b) and FDP_ACF.1(b) allow the applicable normal user to use the MFP application according to the operation permission granted to the successfully identified and authenticated normal user. (3) Complicate decoding of login password. FIA_UAU.7 displays dummy letters as authentication feedback on the Operation Panel and prevents the login password from disclosure. FIA_SOS.1 accepts only passwords that satisfy the minimum character number and password character combination specified by the MFP administrator, and makes it difficult to guess the password. FIA_AFL.1 does not allow the user who is unsuccessfully authenticated for certain times to access to the TOE for certain period. Page 67 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. (4) Terminate login automatically. FTA_SSL.3 automatically logs out of the Operation Panel or the client computer at the state of being logged in. It also logs out the status of document data reception after the completion of document data reception from the printer driver or fax driver. (5) Management of the security attributes. According to FMT_MSA.1(b), the login user name and available function list of normal user are managed by the MFP administrator, and users are not allowed to operate the function type. FMT_MSA.3(b) sets the restrictive default value to the function type. By satisfying FDP_ACC.1(b), FDP_ACF.1(b), FIA_UID.1, FIA_UAU.1, FIA_ATD.1, FIA_USB.1, FIA_UAU.7, FIA_AFL.1, FIA_SOS.1, FTA_SSL.3, FMT_MSA.1(b) and FMT_MSA.3(b), which are the security functional requirements for these countermeasures, O.USER.AUTHORIZED is fulfilled. The function for 2600.2-SMI (F.SMI), selected SFR Package from the PP, is used in conjunction with the function whose access control is enforced by FDP_ACC.1(b) and FDP_ACF.1(b). Therefore, the access control for F.SMI is included with the access control by FDP_ACC.1(b) and FDP_ACF.1(b) and fulfilled. O.INTERFACE.MANAGED Management of external interfaces by TOE O.INTERFACE.MANAGED is the security objective to ensure that the TOE manages the operation of external interface according to the security policy. To fulfil this security objective, it is required to implement the following countermeasures. (1) Identify and authenticate the users prior to use the Operation Panel and LAN interface. FIA_UID.1 identifies the persons who attempt to use the TOE from the Operation Panel or client computer on the network, and FIA_UAU.1 authenticates the identified users. (2) Automatically terminate the connection to the Operation Panel and LAN interface. FTA_SSL.3 terminates the session after no operation is performed from the Operation Panel or LAN interface for certain period. (3) Restricted forwarding of data to external interfaces. FPT_FDI_EXP.1 prevents the data received from the Operation Panel, LAN interface and telephone line from being transmitted from the LAN or telephone line without further processing by the TSF. By satisfying FIA_UID.1, FIA_UAU.1, FTA_SSL.3 and FPT_FDI_EXP.1, which are the security functional requirements for these countermeasures, O.INTERFACE.MANAGED is fulfilled. O.SOFTWARE.VERIFIED Software verification O.SOFTWARE.VERIFIED is the security objective to ensure that the TOE provides procedures to self-verify executable code in the TSF. To fulfil this security objective, it is required to implement the following countermeasures. (1) Self-check FPT_TST.1 checks if the MFP Control Software, FCU Control Software, and Operation Panel Control Software are verified software at the start-up. By satisfying FPT_TST.1, which is the security functional requirement for this countermeasure, O.SOFTWARE.VERIFIED is fulfilled. Page 68 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. O.AUDIT.LOGGED Management of audit log records O.AUDIT.LOGGED is the security objective to record the audit log required to detect the security intrusion, and allow the MFP administrator to view the audit log. To fulfil this security objective, it is required to implement the following countermeasures. (1) Record the audit log. FAU_GEN.1 and FAU_GEN.2 record the events, which should be auditable, with the identification information of the occurrence factor. (2) Protect the audit log. FAU_STG.1 protects the audit logs from the alteration, and FAU_STG.4 deletes the audit logs that have the oldest time stamp, and records the new audit logs if auditable events occur and the audit log files are full. (3) Provide Audit Function. FAU_SAR.1 allows the MFP administrator to read audit logs in a format that can be audited. FAU_SAR.2 prohibits the persons other than the MFP administrator reading the audit logs. (4) Reliable occurrence time of the event FPT_STM.1 provides a trusted time stamp, and a reliable record of the times when events occurred are recorded in the audit log. By satisfying FAU_GEN.1, FAU_GEN.2, FAU_STG.1, FAU_STG.4, FAU_SAR.1, FAU_SAR.2 and FPT_STM.1, which are the security functional requirements for these countermeasures, O.AUDIT.LOGGED is fulfilled. O.STORAGE.ENCRYPTED Encryption of storage devices O.STORAGE.ENCRYPTED is the security objective to ensure the data to be written into the HDD is encrypted. To fulfil this security objective, it is required to implement the following countermeasures. (1) Generate appropriate cryptographic keys. FCS_CKM.1 generates the cryptographic key for encryption. (2) Perform cryptographic operation. FCS_COP.1 encrypts the data to be stored in the HDD, and decrypts the data to be read from the HDD. (3) Manage the TSF data. FMT_MTD.1 allows the MFP administrator to manage the cryptographic keys. (4) Specification of Management Function. FMT_SMF.1 performs the required Management Functions for Security Function. (5) Specification of the roles. FMT_SMR.1 maintains the users who have the privileges. By satisfying FCS_CKM.1, FCS_COP.1, FMT_MTD.1, FMT_SMF.1 and FMT_SMR.1, which are the security functional requirements for these countermeasures, O.STORAGE.ENCRYPTED is fulfilled. 6.3.3 Dependency Analysis Table 29 shows the result of dependency analysis in this ST for the TOE security functional requirements. Page 69 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 29 : Results of Dependency Analysis of TOE Security Functional Requirements TOE Security Functional Requirements Claimed Dependencies Dependencies Satisfied in ST Dependencies Not Satisfied in ST FAU_GEN.1 FPT_STM.1 FPT_STM.1 None FAU_GEN.2 FAU_GEN.1 FIA_UID.1 FAU_GEN.1 FIA_UID.1 None FAU_STG.1 FAU_GEN.1 FAU_GEN.1 None FAU_STG.4 FAU_STG.1 FAU_STG.1 None FAU_SAR.1 FAU_GEN.1 FAU_GEN.1 None FAU_SAR.2 FAU_SAR.1 FAU_SAR.1 None FCS_CKM.1 [FCS_CKM.2 or FCS_COP.1] FCS_CKM.4 FCS_COP.1 FCS_CKM.4 FCS_COP.1 [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] FCS_CKM.4 FCS_CKM.1 FCS_CKM.4 FDP_ACC.1(a) FDP_ACF.1(a) FDP_ACF.1(a) None FDP_ACC.1(b) FDP_ACF.1(b) FDP_ACF.1(b) None FDP_ACF.1(a) FDP_ACC.1(a) FMT_MSA.3(a) FDP_ACC.1(a) FMT_MSA.3(a) None FDP_ACF.1(b) FDP_ACC.1(b) FMT_MSA.3(b) FDP_ACC.1(b) FMT_MSA.3(b) None FDP_RIP.1 None None None FIA_AFL.1 FIA_UAU.1 FIA_UAU.1 None FIA_ATD.1 None None None FIA_SOS.1 None None None FIA_UAU.1 FIA_UID.1 FIA_UID.1 None FIA_UAU.7 FIA_UAU.1 FIA_UAU.1 None FIA_UID.1 None None None FIA_USB.1 FIA_ATD.1 FIA_ATD.1 None FPT_FDI_EXP.1 FMT_SMF.1 FMT_SMR.1 FMT_SMF.1 FMT_SMR.1 None FMT_MSA.1(a) [FDP_ACC.1(a) or FDP_IFC.1] FMT_SMR.1 FMT_SMF.1 FDP_ACC.1(a) FMT_SMR.1 FMT_SMF.1 None FMT_MSA.1(b) [FDP_ACC.1(b) or FDP_IFC.1] FDP_ACC.1(b) FMT_SMR.1 None Page 70 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. TOE Security Functional Requirements Claimed Dependencies Dependencies Satisfied in ST Dependencies Not Satisfied in ST FMT_SMR.1 FMT_SMF.1 FMT_SMF.1 FMT_MSA.3(a) FMT_MSA.1(a) FMT_SMR.1 FMT_MSA.1(a) FMT_SMR.1 None FMT_MSA.3(b) FMT_MSA.1(b) FMT_SMR.1 FMT_MSA.1(b) FMT_SMR.1 None FMT_MTD.1 FMT_SMR.1 FMT_SMF.1 FMT_SMR.1 FMT_SMF.1 None FMT_SMF.1 None None None FMT_SMR.1 FIA_UID.1 FIA_UID.1 None FPT_STM.1 None None None FPT_TST.1 None None None FTA_SSL.3 None None None FTP_ITC.1 None None None The following explains the rationale for acceptability in all cases where a dependency is not satisfied: Rationale for Removing Dependencies on FCS_CKM.4 Once the MFP administrator generates the cryptographic key that is used for the HDD encryption of this TOE at the start of TOE operation, the cryptographic key will be continuously used for the HDD and will not be deleted. Therefore, cryptographic key destruction by the standard method is unnecessary. 6.3.4 Security Assurance Requirements Rationale This TOE is the MFP, which is a commercially available product. The MFP is assumed that it will be used in a general office and this TOE does not assume the attackers with Enhanced-Basic or higher level of attack potential. The evaluation of the TOE design (ADV_TDS.1) is adequate to show the validity of commercially available products. A high attack potential is required for the attacks that circumvent or tamper with the TSF, which is not covered in this evaluation. Dealing with attacks performed by an attacker possessing Basic attack potential (AVA_VAN.2) is therefore adequate for general needs. In order to securely operate the TOE continuously, it is important to appropriately remediate the flaw discovered after the start of the TOE operation according to flow reporting procedure (ALC_FLR.2). Based on the terms and costs of the evaluation, the evaluation assurance level of EAL2+ALC_FLR.2 is appropriate for this TOE. Page 71 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 7 TOE Summary Specification This section describes the TOE summary specification for each security function. The security functions are described for each corresponding security functional requirement. 7.1 Audit Function The Audit Function is to generate the audit log of TOE use and security-relevant events (hereafter, "audit events"). This function provides the recorded audit log in a legible fashion for users to audit (audit log review). The recorded audit log can be viewed and deleted only by the MFP administrator. FAU_GEN.1 and FAU_GEN.2 The TOE records the audit log items, shown in Table 31, on the HDD in the TOE when audit events shown in Table 30 occur. Audit log items include basic log items and expanded log items. Basic log items are recorded whenever audit logs are recorded, and expanded log items are recorded only when audit events occur and the audit log items shown in Table 31 are recorded. FPT_STM.1 The date (year/month/day) and time (hour/minute/second) the TOE records for the audit log are derived from the system clock of the TOE. FAU_SAR.1, FAU_SAR.2, and FAU_STG.1 The TOE displays the operation menu for audit logs to be read on WIM screen only when it is accessed by the MFP administrator. The TOE provides the audit logs in a text format when the MFP administrator instructs the TOE to read the audit logs. FAU_STG.4 The TOE writes the newest audit log over the oldest audit log when there is insufficient space in the audit log files to append the newest audit log. Table 30 : List of Audit Events Audit Events Start-up of the Audit Function Shutdown of the Audit Function Success and failure of login operations Starting and releasing Lockout Table 26 Record of Management Function Date settings (year/month/day), time settings (hour/minute) Page 72 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Audit Events Termination of session by auto logout Failure of WIM communication Folder transmission E-mail transmission of attachments Printing via networks LAN Fax via networks Creating document data (storing) Reading document data (print, download, fax transmission, e-mail transmission of attachments, and folder transmission) Deleting document data Table 31 : List of Audit Log Items Audit Log Items Setting Values of Audit Log Items Audit Events to record Audit Logs Basic Log Items Starting date/time of an event Values of the TOE system clock at an event occurrence - All auditable events shown in Table 30 Ending date/time of an event Values of the TOE system clock at an event termination Event types Audit event identity Subject identity User or TOE identity for an audit event caused by the user or TOE Outcome (*1) Audit event outcome (success or failure) Expanded Log Items Communication directions Communication directions (IN/OUT) - WIM communication Communicating IP address Communicating IP address - WIM communication - Folder transmission - Printing via networks - LAN Fax via networks Communicating e-mail address Communicating e-mail address for e-mail transmission of attachments - E-mail transmission of attachments Lockout operation type Information to identify starting Lockout and releasing Lockout - Starting and releasing Lockout Locked out User Login user name of a user who is locked out - Starting and releasing Lockout Locked out User who is to be released Login user name of a user who is released from Lockout - Starting and releasing Lockout (*1): If an audit event is "Failure of WIM communication", the failure will be recorded as a result. Page 73 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 7.2 Identification and Authentication Function The Identification and Authentication Function is to verify whether persons who intend to use the TOE are authorised users (MFP administrator, supervisor, and normal users) by referring to the identification and authentication information obtained from the users, so that only persons who are confirmed as authorised users are allowed to use the TOE. Verification methods for normal users include those by Basic Authentication and External Authentication. FIA_UAU.1 and FIA_UID.1 The TOE identifies and authenticates a user by checking the login user name and login password entered by the user. However, regarding the viewing of user job lists, WIM Help, system status, the counter and information of inquiries, and execution of fax reception, the TOE identification and authentication is not required for the use of the TOE. When a user uses the Operation Panel, or uses WIM from the client computer, the screen for the user to enter his or her login user name and login password is displayed, and this screen will be displayed until the entry of the login user name and login password is complete. When the TOE is used from the printer driver or fax driver, the TOE receives the login user name and login password entered from each driver by a user. When the entered login user name is the login user name of a normal user, MFP administrator, or supervisor, the TOE checks if the entered login password match with the one pre-registered in the TOE. FIA_USB.1, FIA_ATD.1, and FMT_SMR.1 If a user is identified and authenticated as a result of checking FIA_UAU.1 and FIA_UID.1, the use of the TOE by the user is allowed as the identified user role (normal user, MFP administrator, or supervisor). The user role assigned to the user at login will be maintained until the user logs out. If user identification and authentication fails, use of the TOE is denied. FTA_SSL.3 If a user has been logged on to the TOE from the Operation Panel, a Web browser, printer driver, and fax driver, the user will be logged out of the TOE when the conditions shown below are met. In case of the Operation Panel, the user is logged out of the TOE when the time that elapses since his or her final operation on the Operation Panel reaches Operation Panel auto logout time (10 to 999 seconds). In case of a Web browser, the user is logged out of the TOE when the time that elapses since his or her final operation on a Web browser reaches WIM auto logout time (3 to 60 minutes). In case of printer driver, the user is logged out of the TOE immediately after receiving the print data from the printer driver. In case of fax driver, the user is logged out of the TOE immediately after receiving the transmission information from the fax driver. FIA_UAU.7 Regarding login passwords entered by a person who intends to use the TOE from the Operation Panel or by a person who intends to use WIM from the client computer, the TOE does not display the entered login Page 74 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. password but it displays a sequence of dummy characters whose length is the same as that of the entered password. FIA_AFL.1 The TOE counts the number of identification and authentication attempts that consecutively result in failure using the login user name of a normal user, MFP administrator, or supervisor. The TOE locks out the login user name if the number of consecutive login failures exceeds the number of attempts before lockout. If a user name is locked out, the user with that user name is not allowed to log in unless any of the following conditions is fulfilled. - The lockout time set by the MFP administrator elapses. - An "unlocking administrator" shown in Table 32 and specified for each user role releases the lockout. - In case of the MFP administrator and supervisor, sixty seconds elapse since the MFP becomes executable after its power is turned off and then on. Table 32 : Unlocking Administrators for Each User Role User Roles (Locked out Users) Unlocking Administrators Normal user MFP administrator Supervisor MFP administrator MFP administrator Supervisor FIA_SOS.1 Login passwords for users can be registered only if these passwords meet the following conditions: (1) Usable characters and types: Upper-case letters: [A-Z] (26 letters) Lower-case letters: [a-z] (26 letters) Numbers: [0-9] (ten digits) Symbols: SP (space) ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~ (33 symbols) (2) Registrable password length: - For normal users No less than the minimum character number for password (8-32 characters) specified by the MFP administrator and no more than 128 characters. - For MFP administrators and a supervisor No less than the minimum character number for password (8-32 characters) specified by the MFP administrator and no more than 32 characters. (3) Combination of character types: The number of combined character types specified by the MFP administrators (two types or more, or three types or more). Page 75 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FPT_FDI_EXP.1 The TOE inputs information after the TSF reliably identifies and authenticates the input information from the Operation Panel or the client computer via LAN interface. Therefore, the input information cannot be forwarded unless the TSF is not involved in information identification and authentication. 7.3 Document Access Control Function The Document Access Control Function is to allow authorised TOE users to operate document data and user jobs in accordance with the provided user role privilege or user privilege. FDP_ACC.1(a) and FDP_ACF.1(a) The TOE controls user operations for document data and user jobs in accordance with (1) access control rule on document data and (2) access control rule on user jobs. (1) Access control rule on document data The TOE provides users with the interface for stored documents to be printed, downloaded to the client computers, sent by fax, sent by e-mail as attachments, sent to folders, and deleted. The interface enables users to delete all the stored documents. Users authorised to operate stored documents are MFP administrator and normal users. The supervisor is not allowed to operate stored documents. When the MFP administrator or a normal user logs on to the TOE from the Operation Panel or to WIM from the client computer, the TOE displays a list of the stored documents whose operations are authorised and the menu for the authorised operations (printing, downloading to the client computers, sending by fax, sending by e-mail as attachments, sending to folders, deleting, and deleting all files). When the MFP administrator logs on to the TOE from the Operation Panel or to WIM from the client computer, the TOE displays a list of all the stored documents and the operation menu for deletion and deletion of all files. The MFP administrator can select and delete a document from the list of the stored documents or all documents. Document user lists are set for stored documents. The login user names of normal users who are allowed to operate the stored documents are registered with the document user lists. A document user list is set for each stored document and it includes normal users who have been granted permission to operate the stored document. When a normal user logs on to the TOE from the Operation Panel or to WIM from the client computer, the TOE displays a list of the stored documents whose document user lists include the logged-in normal user, and an operation menu according to the rules shown in Table 33. For fax reception documents, however, one document user list is set for all fax reception documents, instead of each stored document. Therefore the normal users who have been registered with the document user list can see a list of all fax reception documents on the TOE. The privileges that allow users to edit the document user list are shown in "7.8 Security Management Function". Also, the TOE allows only the user job owner to view and delete the document data handled as a user job while Copy Function, Printer Function, Scanner Function, Fax Function, or Document Server Function is being used. While no interface to change job owners is provided, an interface to cancel user jobs is provided. If a user job is cancelled, any document the cancelled job operates will be deleted. Page 76 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Table 33 : Stored Documents Access Control Rules for Normal Users I/F to be Used Available Functions for Users Types of Stored Documents displayed in the List Operations displayed on the Menu Operation Panel Document Server Function Document Server documents Print Delete Operation Panel Document Server Function Fax transmission documents Print Delete Operation Panel Printer Function Printer documents Print Delete Operation Panel Scanner Function Scanner documents E-mail transmission of attachments Folder transmission Delete Operation Panel Fax Function Fax transmission documents Fax transmission E-mail transmission of attachments Folder transmission Print Delete Operation Panel Fax Function Fax reception documents Print Delete Web browser Document Server Function Document Server documents Print Delete Web browser Document Server Function Scanner documents E-mail transmission of attachments Folder transmission Download Delete (E-mail transmission of attachments and folder transmission are authorised for normal users who are privileged to use Scanner Function) Web browser Document Server Function Fax transmission documents Fax transmission Download Print Delete (Fax transmission is authorised for normal users who are privileged to use Fax Function) Web browser Printer Function Printer documents Print Delete Page 77 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. I/F to be Used Available Functions for Users Types of Stored Documents displayed in the List Operations displayed on the Menu Web browser Fax Function Fax reception documents Print Download Delete (Operations above are authorised only if normal users are privileged to use Document Server Function) * The privileges to use available functions are shown in "7.4 Use-of-Feature Restriction Function". (2) Access control rule on user jobs The TOE displays on the Operation Panel a menu to cancel a user job only if the user who logs in from the Operation Panel is a user job owner or MFP administrator and a cancellation of a user job is attempted by the owner or MFP administrator. Other users are not allowed to operate user jobs. When a user job is cancelled, any documents operated by the cancelled job will be deleted. However, if the document data operated by the cancelled user job is a stored document, the data will not be deleted and remain stored in the TOE. No interfaces to modify user jobs are provided. 7.4 Use-of-Feature Restriction Function The Use-of-Feature Restriction Function is to authorise TOE users to use Copy Function, Printer Function, Scanner Function, Document Server Function and Fax Function in accordance with the roles of the identified and authenticated TOE users and user privileges set for each user. FDP_ACC.1(b) and FDP_ACF.1(b) The TOE verifies the role for an authorised TOE user who attempts to start operating Copy Function, Printer Function, Scanner Function, Document Server Function, and Fax Function. If the role is that of normal user, the user can operate only functions that are included in the available function list set for each normal user. If the role is that of MFP administrator, the user can operate Fax Reception Function that corresponds to MFP management. If the role is that of supervisor, using any functions is not allowed. 7.5 Network Protection Function The Network Protection Function is to provide network monitoring to prevent information leakage when LAN is used and to detect data tampering. Page 78 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. FTP_ITC.1 The encrypted communications provided by the TOE differ depending on communicating devices. Table 34 shows the encrypted communications provided by the TOE. Table 34 : Encrypted Communications Provided by the TOE Communicating Devices Encrypted communications provided by the TOE Protocols Cryptographic Algorithms Client computer TLS1.0, TLS1.1, TLS1.2 AES(128bits, 256bits) FTP server IPsec AES(128bits, 192bits, 256bits), 3DES(168bits) SMB server IPsec AES(128bits, 192bits, 256bits), 3DES(168bits) SMTP server S/MIME AES(128bits, 256bits) 7.6 Residual Data Overwrite Function The Residual Data Overwrite Function is to overwrite specific patterns on the HDD and disable the reusing of the residual data included in the deleted documents, temporary documents and their fragments on the HDD. FDP_RIP.1 Methods to delete the HDD area through overwriting include sequential overwriting and batch overwriting. For sequential overwriting, the TOE constantly monitors the information on a residual data area, and overwrites the area if any existing residual data is discovered. If the user deletes document data, the TOE applies the method specified by the MFP administrator and overwrites the area on the HDD where the digital image data of the document data is stored. Also, when a user job is complete, the TOE applies the method specified by the MFP administrator and overwrites the area on the HDD where temporary documents that are created while a user job is executed or the fragments of those temporary documents are stored. Sequential overwriting methods include NSA, DoD, and random number methods. For batch overwriting, the TOE collectively overwrites the HDD with the method specified by the MFP administrator. Batch overwriting methods include NSA, DoD, random number, BSI/VSITR, and Secure Erase methods. NSA method overwrites twice by random numbers and once by Null(0). The DoD method overwrites once by a certain value, once by its complement, and further by random numbers to be verified afterwards. Random number method overwrites for three to nine times by random numbers. The MFP administrator specifies the number of times to overwrite when the TOE is installed. The BSI/VSITR method overwrites data by 00, FF, 00, FF, 00, FF, AA in this order. The Secure Erase method overwrites data using the ATA command "secure erase". Since the Residual Data Overwrite Function is used in combination with Stored Data Protection Function in this ST, all values that overwrite the HDD using sequential overwriting will be encrypted. Page 79 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. 7.7 Stored Data Protection Function The Stored Data Protection Function is to encrypt the data on the HDD and protect the data so that data leakage can be prevented. FCS_CKM.1 and FCS_COP.1 The TOE encrypts data before writing it on the HDD, and decrypts the encrypted data after reading it from the HDD. This process is applied to all data written on and read from the HDD. Detailed cryptographic operations are shown in Table 35. Table 35 : List of Cryptographic Operations for Stored Data Protection Encryption-triggering Operations Cryptographic Operations Standard Cryptographic Algorithm Key Size Writing data to HDD Encrypt FIPS197 AES 256 bits Reading data from HDD Decrypt Following operations by the MFP administrator, the TOE generates a cryptographic key. If a login user is the MFP administrator, the screen to generate an HDD cryptographic key is provided from the Operation Panel. If the MFP administrator gives instructions to generate an HDD cryptographic key from the Operation Panel, the TOE uses a genuine random number generator and generates random numbers that conform to the standard NIST SP 800-90. 7.8 Security Management Function The Security Management Function consists of functions to 1) control operations for TSF data, 2) maintain user roles assigned to normal users, MFP administrator, or supervisor to operate the Security Management Function, and 3) set appropriate default values to security attributes, all of which accord with user role privileges or user privileges that are assigned to normal users, MFP administrator, or supervisor. FMT_MSA.1(a), FMT_MSA.1(b), FMT_MSA.3(a), FMT_MTD.1, FMT_SMF.1 and FMT_SMR.1 The TOE allows operations for TSF data according to the rules described in Table 36. Table 36 : Management of TSF Data TSF Data Operation Interface Operations Users Login user names of normal users Operation Panel, Web browser Newly create, query, modify, delete MFP administrator Page 80 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. TSF Data Operation Interface Operations Users Query Applicable normal user Login user name of supervisor Operation Panel, Web browser Query, modify Supervisor Login user name of MFP administrator Operation Panel, Web browser Newly create MFP administrator Query, modify Applicable MFP administrator Query Supervisor Document data attributes No operation interfaces available No operations allowed None Document user list Stored document types are Document Server document, scanner document, fax transmission document and printer document (with stored print) Operation Panel, Web browser Query, modify MFP administrator, applicable normal user who stored the document Document user list Stored document type is fax reception document(*1) Operation Panel, Web browser Query, modify MFP administrator Default values of the document user list Operation Panel, Web browser Query, modify MFP administrator Available function list Operation Panel, Web browser Query, modify MFP administrator Web browser Query Applicable normal user Function types No operation interfaces available No operations allowed None User roles No operation interfaces available No operations allowed None Login passwords of normal users Operation Panel, Web browser Newly create, modify MFP administrator Modify Applicable normal user Login password of supervisor Operation Panel, Web browser Modify Supervisor Login password of MFP administrator Operation Panel, Web browser Modify Supervisor Newly create MFP administrator Modify Applicable MFP administrator Number of Attempts before Lockout Operation Panel, Web browser Query, modify MFP administrator Page 81 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. TSF Data Operation Interface Operations Users Settings for Lockout Release Timer Web browser Query, modify MFP administrator Lockout time Web browser Query, modify MFP administrator Date settings (year/month/day) Operation Panel, Web browser Query, modify MFP administrator Query Supervisor, normal user Time Operation Panel, Web browser Query, modify MFP administrator Query Supervisor, normal user Minimum character number of password Operation Panel Query, modify MFP administrator Password complexity setting Operation Panel Query, modify MFP administrator Operation Panel auto logout time Operation Panel Query, modify MFP administrator WIM auto logout time Web browser Query, modify MFP administrator Audit log Web browser Query, delete MFP administrator Operation Panel Delete MFP administrator HDD cryptographic key Operation Panel Newly create MFP administrator S/MIME user information Operation Panel, Web browser Newly create, modify, query, delete MFP administrator Query Normal user Destination folder Operation Panel, Web browser Newly create, modify, query, delete MFP administrator Query Normal user Stored Reception File User Operation Panel, Web browser Query, modify MFP administrator User authentication method Operation Panel, Web browser Query MFP administrator IPsec setting information Operation Panel, Web browser Query, modify MFP administrator Page 82 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. TSF Data Operation Interface Operations Users Device Certificate Operation Panel, Web browser Modify MFP administrator (*1): If the MFP administrator modifies Stored Reception File User, and if the stored document type of the document user list of document data is fax reception document, the list will be modified to the values of the Stored Reception File User. FMT_MSA.3(a) and FMT_MSA.3(b) The TOE sets default values for objects/subjects according to the rules described in Table 37 when those objects/subjects are generated. Table 37 : List of Static Initialisation for Security Attributes of Document Access Control SFP Objects Security attributes Default values Document data Document data attribute +PRT: Documents printed from the client computer with direct print, locked print, hold print, and sample print. +SCN: Documents sent by e-mail as attachments or to folders from the MFP. +CPY: Documents copied using the MFP. +FAXOUT: Documents sent by fax from the MFP or client computer. +FAXIN: Documents received from a telephone line. +DSR: Documents stored in the TOE by using Copy Function, Scanner Function, Document Server Function and Fax Data Storage Function. Documents printed using Document Server printing or stored print from the client computer. Document data (stored document types are Document Server document, scanner document and fax transmission document) Document user list Default values of a document user list assigned to a normal user who created the document data. Document data (stored document type is printer document) Document user list Login user name of a normal user who stored the document data. Document data (stored document type is fax reception document) Document user list Login user name of a normal user included in the Stored Reception File User list. User jobs Login user name of normal user Login user name of a normal user who newly creates a user job. Page 83 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved. Objects Security attributes Default values Each MFP application (Copy Function, Printer Function, Scanner Function, Document Server Function and Fax Function) Function type The values specified for each function type is as follows: For Copy Function, values to identify Copy Function. For Document Server Function, values to identify Document Server Function. For Printer Function, values to identify Printer Function. For Scanner Function, values to identify Scanner Function. For Fax Function, values to identify Fax Function. 7.9 Software Verification Function The Software Verification Function is to verify the integrity of the executable codes of the MFP Control Software, FCU Control Software, and Operation Panel Control Software, and confirm that these codes can be trusted. FPT_TST.1 The TOE verifies software at the TOE start-up. The TOE verifies the integrity of the MFP Control Software and Operation Panel Control Software by using the hash of the MFP Control Software and Operation Panel Control Software and then by checking the certificate. If the hash does not match its original value or the certificate verification fails, the TOE displays the error message and becomes unavailable. If the hash matches its original value and the certificate is verified, the TOE becomes available. The TOE also verifies the integrity of the audit log data files. The TOE outputs the information used for integrity verification so that the integrity of the FCU Control Software can be verified. To check the integrity of the FCU Control Software, the information the TOE outputs will be compared with the information described in the guidance documents, so that the integrity of the FCU Control Software can be verified. 7.10 Fax Line Separation Function The Fax Line Separation Function is to receive only faxes as input information from telephone lines so that unauthorised intrusion from telephone lines can be prevented. This function also can be used to prohibit transmissions of received faxes so that unauthorised intrusion from telephone lines to the LAN can be prevented. FPT_FDI_EXP.1 The TOE receives fax data only as input information from telephone lines. If any communication that does not comply with the fax protocol is performed, the line is disconnected. Since the TOE is set to prohibit forwarding of received fax data during installation, received fax data will not be forwarded. Page 84 of 84 Copyright (c) 2018 RICOH COMPANY, LTD. All rights reserved.