KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (1/102 Page) KSignAccess V4.1 Security Target V1.3 KSign Co., Ltd. * The Security Target related to the certified TOE. This Security Target is written in Korean and translated from Korean into English. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (2/102 Page) Copyright ⓒ 2022 KSIGN Co., Ltd. All rights reserved. KSignAccess V4.1 Security Target KSIGN, KSignSecureDB, KSignAccess, WizSign, KSignCASE, KSignPKI, KSignCA, KSignRA, KAMOS is a program and registered trademark of KSign Co., Ltd. and protected by copyright law. Therefore, the copyright of this document is provided by KSign Co., Ltd. without the permission of the head office, without any permission to reproduce or use this trademark partly or wholly. 5F, B1, 577, Seolleung-ro, Gangnam-gu, Seoul TEL : 02-564-0182 FAX : 02-564-1627 http://www.ksign.com KSign Co., LTD. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (3/102 Page) Rivision History Version Date Detail Created by Reviewed by V1.0 2021.10.29 Initial version Yu Beodeul Uh Seong-Ryul V1.1 2022.01.03 Update Yu Beodeul Uh Seong-Ryul V1.2 2022.02.08 Update Yu Beodeul Uh Seong-Ryul V1.3 2022.03.21 Update Yu Beodeul Uh Seong-Ryul KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (4/102 Page) Contents 1. ST INTRODUCTION..........................................................................................................................10 1.1 ST REFERENCE ..........................................................................................................................................................10 1.2 TOE REFERENCE .......................................................................................................................................................10 1.3 TOE OVERVIEW ........................................................................................................................................................11 1.3.1 Single Sign On overview ........................................................................................................................11 1.3.2 TOE type and scpoe .................................................................................................................................11 1.3.3 TOE usage and major security features...........................................................................................11 1.4 TOE OPERATIONAL ENVIRONMENT ......................................................................................................................14 1.4.1 non-TOE and TOE operational environment.................................................................................14 1.4.2 Requirements for non-TOE software, hardware, firmware ......................................................15 1.5 TOE DESCRIPTION ...................................................................................................................................................18 1.5.1 Physical scope of the TOE......................................................................................................................18 1.5.2 Logical scope of the TOE .......................................................................................................................20 1.6 TERMS AND DEFINITIONS .......................................................................................................................................25 1.7 CONVENTIONS..........................................................................................................................................................30 2. CONFORMANCE CLAIM..................................................................................................................32 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (5/102 Page) 2.1 CC CONFORMANCE CLAIM ....................................................................................................................................32 2.2 PP CONFORMANCE CLAIM.....................................................................................................................................32 2.3 PACKAGE CONFORMANCE CLAIM..........................................................................................................................32 2.4 CONFORMANCE CLAIM RATIONALE ......................................................................................................................33 3. SECURITY OBJECTIVES....................................................................................................................34 3.1 SECURITY OBJECTIVES FOR THE OPERATIONAL ENVIRONMENT........................................................................34 4. EXTENDED COMPONENTS DEFINITION......................................................................................36 4.1 CRYPTOGRAPHIC SUPPORT (FCS) .........................................................................................................................36 4.1.1 Random bit generation...........................................................................................................................36 4.2 IDENTIFICATION AND AUTHENTICATION (FIA)....................................................................................................37 4.2.1 TOE Internal mutual authentication...................................................................................................37 4.2.2 Specification of Secrets...........................................................................................................................38 4.3 SECURITY MANAGEMENT (FMT)..........................................................................................................................39 4.3.1 ID and pasword ..........................................................................................................................................39 4.4 PROTECTION OF THE TSF (FPT) ...........................................................................................................................41 4.4.1 Protection of stored TSF data..............................................................................................................41 4.5 TOE ACCESS (FTA)..................................................................................................................................................42 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (6/102 Page) 4.5.1 Session locking and termination ........................................................................................................42 5. SECURITY REQUIREMENTS.............................................................................................................44 5.1 SECURITY FUNCTIONAL REQUIREMENTS...............................................................................................................44 5.1.1 Security audit (FAU) ..................................................................................................................................46 5.1.2 Cryptographic support (FCS)................................................................................................................52 5.1.3 Identification and authentication (FIA) ............................................................................................56 5.1.4 Security management (FMT).................................................................................................................61 5.1.5 Protection of the TSF (FPT)....................................................................................................................65 5.1.6 TOE access (FTA).........................................................................................................................................66 5.2 SECURITY ASSURANCE REQUIREMENTS ................................................................................................................68 5.2.1 Security Target evaluation......................................................................................................................69 5.2.2 Development................................................................................................................................................74 5.2.3 Guidance documents ...............................................................................................................................75 5.2.4 Life-cycle support......................................................................................................................................77 5.2.5 Tests .................................................................................................................................................................78 5.2.6 Vulnerability assessment.........................................................................................................................80 5.3 SECURITY REQUIREMENTS RATIONALE..................................................................................................................81 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (7/102 Page) 5.3.1 Dependency rationale of security functional requirements....................................................81 5.3.2 Dependency rationale of security assurance requirements....................................................84 6. TOE SUMMARY SPECIFICATION....................................................................................................85 6.1 SECURITY AUDIT (FAU) ..........................................................................................................................................85 6.1.1 Security Alert ...............................................................................................................................................85 6.1.2 Audit data generation .............................................................................................................................86 6.1.3 Audit data review.......................................................................................................................................88 6.1.4 Audit repository inspection and security violation response ................................................88 6.1.5 SFR Mapping................................................................................................................................................88 6.2 CRYPTOGRAPHIC SUPPORT (FCS).........................................................................................................................89 6.2.1 Cryptographic support............................................................................................................................89 6.2.2 Random generate......................................................................................................................................91 6.2.3 SFR Mapping................................................................................................................................................91 6.3 IDENTIFICATION AND AUTHENTICATION (FIA) ...................................................................................................91 6.3.1 Authentication failure response ..........................................................................................................92 6.3.2 Protection of authentication data ......................................................................................................92 6.3.3 Password policy validation.....................................................................................................................93 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (8/102 Page) 6.3.4 Authentication data prevents...............................................................................................................93 6.3.5 Mutual authentication .............................................................................................................................94 6.3.6 Authentication token generate and distruction...........................................................................95 6.3.7 SFR Mapping................................................................................................................................................96 6.4 SECURITY MANAGEMENT (FMT)..........................................................................................................................96 6.4.1 Management of Security functions behaviour .............................................................................96 6.4.2 ID and Password management............................................................................................................97 6.4.3 SFR Mapping................................................................................................................................................98 6.5 PROTECTION OF THE TSF.......................................................................................................................................98 6.5.1 Internal TSF data transfer protection................................................................................................98 6.5.2 Protection of stored TSF data..............................................................................................................98 6.5.3 TSF Self Tests ...............................................................................................................................................99 6.5.4 Integrity Tests............................................................................................................................................100 6.5.5 SFR Mapping.............................................................................................................................................101 6.6 TOE ACCESS (FTA)...............................................................................................................................................102 6.6.1 Administrator Session Restrictions...................................................................................................102 6.6.2 Locking the Session in the Security Management Interface...............................................102 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (9/102 Page) 6.6.3 SFR Mapping.............................................................................................................................................102 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (10/102 Page) 1. ST Introduction 1.1 ST reference Title KSignAccess V4.1 Security Target Version V1.3 Author KSign Co., LTD. Publictaion Date 2022. 03. 21 Common Criteria version CC V3.1 r5 Evaluation Assurance Level EAL 1+ (ATE_FUN.1) Protection Profile Korean National Protection Profile for Single Sign On V1.1 Keywords Single Sign On, SSO [Table 1-1] ST reference 1.2 TOE reference Item Specification TOE KSignAccess V4.1 Version V4.1.2 Components KSignAccess Server KSignAccess Server V4.1.2 KSignAccess Agent KSignAccess Agent for Linux KSignAccess Agent for Linux V4.1.2 KSignAccess Agent for Windows KSignAccess Agent for Windows V4.1.2 Developer KSign Co., LTD. [Table 1-2] TOE reference KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (11/102 Page) 1.3 TOE overview 1.3.1 Single Sign On overview The TOE is a used to enable the user to access various business systems and use the service through a single user login(Single Sign-On) without additional login action. The TOE performs user identification and authentication, authentication token(hereinafter referred to as “token”) issue and validity verification according to the user authentication policy. The TOE shall provide the user login capability using ID and password, issue a token during user login, and verify the issued token if accessing another business system after user login. The primary security features provided by the TOE include user identification and authentication, token issue, storage, verification and destruction. The TOE must use a validated cryptographic module whose security and implementation conformance are validated by the Korea Cryptographic Module Validation Program (KCMVP). The TOE uses the following validated cryptographic module. - Cryptographic module name : KSignCrypto for java V1.0.1.0 - Validation number : CM-167-2025.5 - Expiration date : May 08, 2020 1.3.2 TOE type and scpoe The TOE defined by this Security Target is SSO that enables the user to access various business systems through a single user login, and the TOE is provided as software. The KSignAccess Server and the KSignAccess Agent are the indispensable TOE component defined in this ST. The TOE is composed of the server that processes user login, manages the token, and sets the policy; and the agent that is API type installed in each business system performs the function of token issue and verification. 1.3.3 TOE usage and major security features The TOE performs End user identification and authentication to enable the End user to access various business systems and use the service through a single user login without additional login action. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (12/102 Page) The TOE provides the security audit function that records and manages critical events as audit data when activating the security functionality and management function, function of protecting the data that stored in the TSF controlled repository, and TSF protection function such as TSF self-testing. In addition, the TOE provides authentication failure handling, identification and authentication functions including mutual authentication between the TOE components, cryptographic support function such as cryptographic key management and cryptographic operation for issuing a token, security management function for management of security functions behaviour and configuration, and the TOE access function to manage the authorized administrator’s interacting session. In addition, the token provides confidentiality and integrity protection, and the TOE executable code provides integrity protection. The end user identification and authentication process is divided into the initial authentication phase using the ID/password and the token-based authentication phase that accesses the business system using the token issued during the initial authentication procedure. The execution procedure of the initial authentication phase is as follows. End user has access to the business system, and the KSignAccess agent that receives the login request message sends a login verification request to the KSignAccess Server, which in turn checks the authorized user status. Upon receiving the login verification request, the KSignAccess Server performs login verification directly using the End user information stored in the DBMS. The KSignAccess Server requests token issue to the KSignAccess Agent if the login verification result is valid. The KSignAccess Server or KSignAccess Agent transfers an issued token to the user. The token-based authentication phase is performed only when the token has been normally issued in the initial authentication phase. When the user utilizes business system services, the issued token is transferred to the KSignAccess Agent installed in the pertinent business system, and the KSignAccess Agent verifies the validity of the token by interfacing with the KSignAccess Server upon receiving the token. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (13/102 Page) [Figure 1-1] end-user identification and authentication procedure Authentication phase Operation procedure Initial authentication (A) Business system Access – (B) Token issue request 1 – (C) Login request and Login verification – (D) Token issue 1 - (E) Token verification request 1 and Token verification 1 Token-based authentication (F) Business system Access – (G) Token issue request 2 – (H) Token issue 2 - (I) Token verification request 2 and Token verification 2 [Table 1-3] operation procedure by authentication phase - Authentication token issuer : KSignAccess Server - Authentication token storage location : End User PC - Authentication token validator : KSignAccess Agent KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (14/102 Page) 1.4 TOE operational environment 1.4.1 non-TOE and TOE operational environment [Figure 1-2] TOE Operation environment Figure 1-2 shows the general TOE operational environment. The TOE operational environment consists of KSignAccess Server and KSignAccess Agent. The KSignAccess Server verifies end user login attempts directly using the end user information stored in the DBMS, the token management, and the policy configuration, Provides security management interface functions for TOE management. The KSignAccess Agent, consisting of library files, performs end user login verification requests from KSignAccess Server, authentication token verification functions in each business system. When the TOE Administrator accesses the TOE security management interface by entering the management server web address on the browser, the browser forms an HTTPS security channel. There may exist various external entities necessary for the operation of the TOE, including email server to notify the authorized administrator in case of audit data loss. The mail server, which is an external entity other than TOE, corresponds to the TOE operational environment. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (15/102 Page) 1.4.2 Requirements for non-TOE software, hardware, firmware The requirements for hardware, software and operating system to install the TOE are as in the following. TOE Item Specification KSignAccess Server CPU Intel Core i7 3.60 GHz or higher Memory 16GB or higher HDD Space required for installation of TOE 500MB or higher NIC 100/1000 Mbps x 1EA or higher KSignAccess Agent KSignAccess Agent for Linux CPU Intel Core i5 3.30 GHz or higher Memory 8 GB or higher HDD Space required for installation of TOE 500MB or higher NIC 100/1000 Mbps x 1EA or higher KSignAccess Agent for Windows CPU Intel Core i5 3.30 GHz or higher Memory 8 GB or higher HDD Space required for installation of TOE 500MB or higher NIC 100/1000 Mbps x 1EA or higher [Table 1-4] Requirement hardware for non-TOE The operating system on which the TOE operates is as in the following. TOE Operating system KSignAccess Server CentOS 7.6 kernel 3.10.0 (64 bit) KSignAccess Agent KSignAccess Agent for Linux CentOS 7.6 kernel 3.10.0 (64 bit) KSignAccess Agent for Windows Windows Server 2019 Datacenter (64 bit) [Table 1-5] Operating system for TOE support KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (16/102 Page) The requirements for security management are as in the following. Item Sub item Specification Software Web Browser Google chrome 98.0 (64bit) [Table 1-6] Requirement for management system The TOE uses the following validated cryptographic module. TOE S/W Specification KSignAccess Server KSignCrypto for java V1.0.1.0 Validation cryptographic modules for Cryptographic key generation, distribution, destruction and Cyryptographic operation, cryptographic commnunication between KSignAccess Server and KSign Access Agent. KSignAccess Agent KSignCrypto for java V1.0.1.0 Validation cryptographic modules for Cryptographic key generation, distribution, destruction and Cyryptographic operation, cryptographic commnunication between KSignAccess Server and KSign Access Agent. [Table 1-7] Validated cryptographic module information The details of the validated cryptographic module included in the TOE are as following. Item Specification Cryptographic module name KSignCrypto for java V1.0.1.0 Developer KSign Co., Ltd. Validation date May 08, 2020 Validation level VSL1 Validation number CM-167-2025.05 [Table 1-8] details of Validated cryptographic module KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (17/102 Page) Non-TOE software that is not within the TOE range but is required to operate normally is as following. TOE S/W Specification KSignAccess Server Java(JRE) 1.8.0_321 Running and operating KSignAccess Server based on Java Application, security management, and Web Server Operation Apache Tomcat 8.5.75 Performing security management by authorized administrators. Java based operation of the Web Application Server (WAS) MySQL 8.0.28 TOE Policy Settings and Audit Data Stores KSignAccess Agent Java(JRE) 1.8.0_321 Running and operating KSignAccess Server based on Java Application, security management, and Web Server Operation Apache Tomcat 8.5.75 Java based operation of the Web Application Server (WAS) [Table 1-9] Software for non-TOE Operating the TOE requires the following additional systems in the IT environment. Item Specification Mail Server (SMTP Server) Send alert mail to administrators [Table 1-10] Operation support IT environment for TOE 3rd Party for performing the security function of TOE is as follows. TOE S/W Usage KSignAccess Server log4j 2.17.1.jar Product operation log trail javax.mail 1.6.2.jar Send mail spring security 5.6.1.jar Perform authentication authorization when performing admin page login KSignAccess Agent log4j 2.17.1.jar Product operation log trail [표 1-11] 3rd Part for performing security functions. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (18/102 Page) 1.5 TOE description This section describes the physical and logical scope and boundaries of the TOE. 1.5.1 Physical scope of the TOE The TOE consists of Server, Agent, Preparation Procedures and Operation Guide. Scope Distribution Status Type Distribute TOE components KSignAccess Server KSignAccess Server V4.1.2 (KSignAccess_Server_V4.1.2.tar) S/W CD KSignAccess Agent KSignAccess Agent for Linux V4.1.2 (KSignAccess_Agent_Linux_V4.1.2.tar) KSignAccess Agent for Windows V4.1.2 (KSignAccess_Agent_Windows_V4.1.2.zip) Manual Preparative Procedure KSignAccess V4.1 Preparative Procedure V1.2 (KSignAccess V4.1 Preparative Procedure V1.2.pdf) File (PDF) Operation Guide KSignAccess V4.1 Operation Guide V1.2 (KSignAccess V4.1 Operation Guide V1.2.pdf) [Table 1-12] Physical scope of the TOE KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (19/102 Page) [Figure 1-3] Physical scope of the TOE KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (20/102 Page) 1.5.2 Logical scope of the TOE [Figure 1-4] Logical scope of the TOE ◼ Security Audit - KSignAccess Server provides audit information only to authorized administrators and understand it. Generate audit data in the event of an audited event, detect potential violations, and send an alert email to an authorized administrator. It also provides the ability to store and manage all generated audit data safely in an audit trail (DBMS), prevent unauthorized deletion of audit data, and protect the audit trail by ignoring audited events when the audit trail is possible audit data loss. And when the audit trail is exceeded or saturated, an e-mail is sent to the registered administrator. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (21/102 Page) - The KSignAccess Agent records the audit trail of the KSignAccess Agent in the event of an audit of the end-user's identification and authentication success and failure, and the KSignAccess Agent's integrity verification. ◼ Cryptographic support - The TOE generates and destroys all cryptographic keys used for product operation through KSignCrypto for java V1.0.1.0, which is a validated cryptographic module whose security and implementation conformity is verified through the cryptographic module verification system. Token generation / verification. - In addition, a cryptographic key is generated and exchanged through KSignCrypto for java V1.0.1.0, a validated cryptographic module, for secure communication between physically separated KSignAccess Server and KSignAccess Agent.  Cryptographic key generation : - HASH_DRBG(SHA256, 256bit) : Symmetric key generate for data encryption/decryption. - RSAES(2048bit) : Asymmetric key generate for data encryption/decryption. - PBKDF2 : Generate encryption key for password-based key derivation  Symmetric Key Encryption/Decryption(SEED-CBC, 128bit) : Authentication Token Encryption/Decryption and important settings information encryption, secure communication channel between KSignAccess Server and KSignAccess Agent.  Asymmetric Key Encryption/Decryption(RSAES, 2048bit) : Authentication token, Symmetric key exchange for Authentication token request message encryption.  Session Key (SEED-CBC, 128bit): Generates and encryption key for section encryption during mutual authentication  Digital signature generation and verification (RSA-PSS, 2048bit) : TOE Component mutual authentication.  Integrity (SHA-256): Generate configuration and module integrity check data  HMAC(HMAC-SHA256) : Generate integrity verification data  KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (22/102 Page) ◼ Identification and authentication - KSignAccess Server provides the function to identification and authentication the administrator who wants to use the security management function before every action and to protect the authentication feedback when entering the authentication data. In addition, it provides a secure identification and authentication function according to the authentication lock processing function in case of continuous authentication failure. It also blocks attempts to reuse authentication information for administrators logging in to KSignAccess Server. - KSignAccess Agent identification and authentication to KSignAccess Agent for end-user to use single sign on function. It provides a function to protect authentication feedback when entering authentication data and provides secure identification and authentication function according to authentication lock processing function in case of consecutive authentication failure. It also blocks attempts to reuse authentication information for normal users logging in to KSignAccess Agent.  Authenticate token generation : KSignAccess Server generation using validated cryptographic module.  Authenticate token verification : KSignAccess Agent verifiacation using validated cryptographic module. - The TOE provides a mechanism to verify the following enforce defined quality metrics for administrator and end-user password verification.  Min/Max length : 9 ~ 16 digits  Allowable characters : English letter (52 letters: a~Z), Number (10 letters: 0~9), Special character that can be input by using a keyboard (27 letters: .-/+=_,:!@#$%^*()~{}[]|<>;&)  Combination of English characters (capital letter, small letter), numbers, and special characters use three or more combinations and lengths must be 9 to 16 digits - When generating the authentication token used by the TOE, the authentication token is generated using the one-time authentication data (using the time stamp) through validated cryptographic module, the authentication token is overwritten with data 0x30 when the authentication token is destroyed. - TOE performs mutual authentication through a self-implemented protocol between the KSignAccess Server and the KSignAccess Agent. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (23/102 Page) ◼ Security Management - KSignAccess Server provides access control policy management, administrator management, security management function of KSignAccess Server configuration to authorized administrator, and authorized administrator performs security management through security management interface. - The authorized administrator is the top administrator and the audit administrator. The top administrator can perform all the security management functions of the TOE through the security management interface, and the audit administrator can perform the audit data inquiry function. - The authorized administrator forces the password to be changed at the first access to the security management interface. In case of the audit administrator, the password must be changed after the password is reset by the authorized administrator. - The authorized administrator can change the password of the administrator or the end-user through the security management interface and verifies the validity of the password value according to the password policy when generating and changing the passwords of the end- user and the authorized administrator. - The general user is forced to change the password at the time of initial access through the user login page. And the authorized administrator changes the password when accessing after resetting the password through the security management interface. ◼ Protection of the TSF - KSignAccess Server guarantees the confidentiality and integrity of TSF data transmitted for physically separated KSignAccess Agent through secure communication. KSignAccess Server maintains secure state and maintains security function at during intial start-up and regular interval The TOE performs periodic self-tests to check the status of the process and performs integrity checks on the TSF data and the TSF executable code that are subject to the integrity check. - KSignAccess Agent loads TSF data for secure communication and mutual authentication with KSignAccess Server at startup and receives integrity information from KSignAccess Server after mutual authentication succeeds and performs integrity check on TSF data and components. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (24/102 Page) - To protect TSF data, TOE safely stores and manages authentication information of general users and managers, verification information of TOE integrity, KSign Access Server, and KSign Access Agent information in files or DBMS. - The authentication token is temporarily loaded into the PC memory through the browser of the general user and destroyed immediately after use. ◼ TOE access - The maximum number of concurrent sessions is limited to 1 for management access session of administrator who can access to manage security management function of KSignAccess Server. If login is performed with same account or same privilege from other administrator PC after login of authorized administrator, and provides a function of terminating an existing connection. Also, if the administrator session exceeds the set inactivity time, the administrator session is terminated. - In the case of the audit administrator, the access session is restricted according to the access permission IP rule and the audit data on the result of the session restriction of the security management interface is generated. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (25/102 Page) 1.6 Terms and definitions Terms used in this ST, which are the same as in the CC, must follow those in the CC. Application Programming Interface (API) A set of software libraries that exist between the application layer and the platform system layer and facilitate the development of applications that run on the platform Approved cryptographic algorithm A cryptographic algorithm selected by Korean Cryptographic Module Validation Authority for block cipher, secure hash algorithm, message authentication code, random bit generation, key agreement, public key cipher, digital signatures cryptographic algorithms considering safety, reliability and interoperability Approved mode of operation The mode of cryptographic module using approved cryptographic algorithm Assets Entities that the owner of the TOE presumably places value upon Assignment The specification of an identified parameter in a component (of the CC) or requirement Attack potential Measure of the effort to be expended in attacking a TOE expressed as an attacker's expertise, resources and motivation Augmentation Addition of one or more requirement(s) to a package Authentication Data Information used to verify a user's claimed identity Authentication token Authentication data that authorized end-users use to access the business system Authorized Administrator Authorized user to securely operate and manage the TOE KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (26/102 Page) Top Administrator The authorized administrator who has the highest authority to perform all security management functions in the security management interface Audit Administrator An authorized administrator who can perform the audit record retrieval function in the security management interface Authorized User The TOE user who may, in accordance with the SFRs, perform an operation Business System An application server that authorized end-users access through ‘SSO’ Can/could The ‘can’ or ‘could’ presented in Application notes indicates optional requirements applied to the TOE by ST author’s choice Class Set of CC families that share a common focus Client Application program that can access the services of SSO server or SSO agent through network Component Smallest selectable set of elements on which requirements may be based Critical Security Parameters (CSP) Information related to security that can erode the security of the encryption module if exposed or changed (e.g., verification data such as secret key/private key, password, or Personal Identification Number) Database Management System (DBMS) A software system composed to configure and apply the database. Decryption The act that restoring the ciphertext into the plaintext using the decryption key Dependency Relationship between components such that if a requirement based on the depending component is included in a PP, ST or package, a requirement based on the component that is depended upon must normally also be included in the PP, ST or package KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (27/102 Page) Element Indivisible statement of a security need Encryption The act that converting the plaintext into the ciphertext using the encryption key end-user Users of the TOE who want to use the business system, not the administrators of the TOE Evaluation Assurance Level (EAL) Set of assurance requirements drawn from CC Part 3, representing a point on the CC predefined assurance scale, that form an assurance package External Entity Human or IT entity possibly interacting with the TOE from outside of the TOE boundary Family Set of components that share a similar goal but differ in emphasis or rigour Identity Representation uniquely identifying entities (e.g. user, process or disk) within the context of the TOE Iteration Use of the same component to express two or more distinct requirements Korea Cryptographic Module Validation Program (KCMVP) A system to validate the security and implementation conformance of cryptographic modules used for protection of important but not classified information among the data communicated through the information and communication network of the government and public institutions Management access The access to the TOE by using the HTTPS, SSH, TLS, etc to manage the TOE by administrator, remotely Management Console Application program that provides GUI, CLI, etc. to the administrator and provides system management and configuration Object Passive entity in the TOE containing or receiving information and on which subjects perform operations KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (28/102 Page) Operation(on a component of the CC)) Modification or repetition of a component. Allowed operations on components are assignment, iteration, refinement and selection Operation(on a subject) Specific type of action performed by a subject on an object Private Key A cryptographic key which is used in an asymmetric cryptographic algorithm and is uniquely associated with an entity(the subject using the private key), not to be disclosed Protection Profile (PP) Implementation-independent statement of security needs for a TOE type Public Key A cryptographic key which is used in an asymmetric cryptographic algorithm and is associated with an unique entity(the subject using the public key), it can be disclosed Public Key(asymmetric) cryptographic algorithm A cryptographic algorithm that uses a pair of public and private key Public Security Parameters (PSP) security related public information whose modification can compromise the security of a cryptographic module Random bit generator (RBG) A device or algorithm that outputs a binary sequence that is statistically independent and is not biased. The RBG used for cryptographic application generally generates 0 and 1 bit string, and the sequence can be combined into a random bit block. The RBG is classified into the deterministic and non-deterministic type. The deterministic type RBG is composed of an algorithm that generates bit strings from the initial value called a “seed key,” and the non-deterministic type RBG produces output that depends on the unpredictable physical source. Recommend/be recommended The ‘recommend’ or ‘be recommended’ presented in Application notes is not mandatorily recommended, but required to be applied for secure operations of the TOE Refinement Addition of details to a component KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (29/102 Page) Role Predefined set of rules on permissible interactions between a user and the TOE Secret Key The cryptographic key which is used in symmetric cryptographic algorithm and is associated with on or more entity, it is not allowed to release Secure Sockets Layer (SSL) This is a security protocol proposed by Netscape to ensure confidentiality, integrity and security over a computer network Security Policy Document Document uploaded to the list of the validated cryptographic module with the module’s name and specifying the summary for the cryptographic algorithms and operational environments of the TOE Security Target (ST) Implementation-dependent statement of security needs for a specific identified TOE Selection Specification of one or more items from a list in a component Self-test Pre-operational or conditional test executed by the cryptographic module Sensitive Security Parameters (SSP) critical security parameters (CSP) and public security parameters (PSP) Shall/must The ‘shall’ or ‘must’ presented in Application notes indicates mandatory requirements applied to the TOE Subject Active entity in the TOE that performs operations on objects Symmetric cryptographic technique Encryption scheme that uses the same secret key in mode of encryption and decryption, also known as secret key cryptographic technique Target of Evaluation (TOE) Set of software, firmware and/or hardware possibly accompanied by guidance KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (30/102 Page) Threat Agent Entity that can adversely act on assets TOE Security Functionality (TSF) Combined functionality of all hardware, software, and firmware of a TOE that must be relied upon for the correct enforcement of the SFRs Transport Layer Security (TLS) This is a cryptographic protocol between a SSL-based server and a client and is described in RFC 2246 TSF Data Data for the operation of the TOE upon which the enforcement of the SFR relies User Refer to "External entity“, authorized administrator and authorized end-user in the TOE Validated Cryptographic Module A cryptographic module that is validated and given a validation number by validation authority Wrapper Interfaces for interconnection between the TOE and various types of business systems or authentication systems 1.7 Conventions The notation, formatting and conventions used in this ST are consistent with the Common Criteria for Information Technology Security Evaluation. The CC allows several operations to be performed for functional requirements: iteration, assignment, selection and refinement. Each operation is used in this PP. Iteration Iteration is used when a component is repeated with varying operations. The result of iteration is maked with an iteration number in parenthesis following the component identifier, i.e., denoted as (iteration No.). Assignment KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (31/102 Page) This is used to assign specific values to unspecified parameters (e.g., password length). The result of assignment is indicated in square brackets like [ assignment_value ]. Selection This is used to select one or more options provided by the CC in stating a requirement. The result of selection is shown as underlined and italicized. Refinement This is used to add details and thus further restrict a requirement. The result of refinement is shown in bold text. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (32/102 Page) 2. Conformance claim 2.1 CC conformance claim Common Criteria (CC) Common Criteria for Information Technology Security Evaluation, Version 3.1, Revision 5 - Common Criteria for Information Technology Security Evaluation. Part 1: Introduction and General Model, Version 3.1, Revision 5 (CCMB-2017-04-001, April, 2017) - Common Criteria for Information Technology Security Evaluation. Part 2: Security Functional Components, Version 3.1, Revision 5 (CCMB-2017-04-002, April, 2017) - Common Criteria for Information Technology Security Evaluation. Part 3: Security Assurance Components, Version 3.1, Revision 5 (CCMB-2017-04-003, April, 2017) Protection Profile (PP) Korean National Protection Profile for Single Sign On V1.1 Conformance Claim Part 2 Security functional components Extended : FCS_RBG.1, FIA_IMA.1, FIA_SOS.3, FMT_PWD.1, FPT_PST.1, FTA_SSL.5 Part 3 Security assurance components Conformant Package Augmented : EAL1 augmented (ATE_FUN.1) [Table 2-1] Conformance Claim 2.2 PP conformance claim The Protection Profile to which this Security Target complies is ‘Korean National Protection Profile for Single Sign On V1.1’ 2.3 Package conformance claim This Protection Profile claims conformance to assurance package EAL1 augmented with ATE_FUN.1. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (33/102 Page) 2.4 Conformance claim rationale This ST claims conformance to security objectives and security requirements by “strict PP conformance” adherence to ‘Korean National Protection Profile for Single Sign On V1.1’. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (34/102 Page) 3. Security objectives The followings are the security objectives handled by technical and procedural method supported from operational environment in order to provide the TOE security functionality accurately. 3.1 Security objectives for the operational environment OE.PHYSICAL_CONTROL The place where SSO agent and SSO server among the TOE components are installed and operated shall be equipped with access control and protection facilities so that only authorized administrator can access. OE.TRUSTED_ADMIN The authorized administrator of the TOE shall be non-malicious users, have appropriately trained for the TOE management functions and accurately fulfill the duties in accordance with administrator guidelines. OE.LOG_BACKUP The authorized administrator shall periodically checks a spare space of audit data storage in case of the audit data loss, and carries out the audit data backup (external log server or separate storage device, etc.) to prevent audit data loss. OE.OPERATION_SYSTEM_REINFORCEMENT The authorized administrator of the TOE shall ensure the reliability and security of the operating system by performing the reinforcement on the latest vulnerabilities of the operating system in which the TOE is installed and operated. OE.SECURE_DEVELOPMENT The developer who uses the TOE to interoperate with the end-user identification and authentication function in the operational environment of the business system shall ensure that the security functions of the TOE are securely applied in accordance with the requirements of the manual provided with the TOE. OE.TIME STAMP The TOE accurately records incidents related to security by receiving reliable time stamps provided by the TOE operating environment. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (35/102 Page) OE.DBMS DBMS that saves the TSF data and audit data is operated in a physically safe environment. OE.TRSTED_PATH/CHANNEL TOE requires that all information transmitted by an administrator authorized through a web browser accessing the management server be protected through a secure path/channel. [Table 3-1] Security objectives for the operational environment KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (36/102 Page) 4. Extended components definition 4.1 Cryptographic support (FCS) 4.1.1 Random bit generation Family Behaviour This family defines requirements for the TSF to provide the capability that generates random bits required for TOE cryptographic operation. Component leveling FCS_RBG.1 random bit generation, requires TSF to provide the capability that generates random bits required for TOE cryptographic operation. Management: FCS_RBG.1 There are no management activities foreseen. Audit: FCS_RBG.1 There are no auditable events foreseen. 4.1.1.1 FCS_RBG.1 Randombit generation Hierarchical to No other components. Dependencies No dependencies. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (37/102 Page) FCS_RBG.1.1 The TSF shall generate random bits required to generate a cryptographic key using the specified random bit generator that meets the following [assignment: list of standards]. 4.2 Identification and authentication (FIA) 4.2.1 TOE Internal mutual authentication Family Behaviour This family defines requirements for providing mutual authentication between TOE components in the process of user identification and authentication. Component leveling FIA_IMA.1 TOE Internal mutual authentication requires that the TSF provides mutual authentication function between TOE components in the process of user identification and authentication. Management: FIA_IMA.1 There are no management activities foreseen. Audit: FIA_IMA.1 The following actions are recommended to record if FAU_GEN Security audit data generation is included in the PP/ST: a) Minimum : Success and failure of mutual authentication 4.2.1.1 FIA_IMA.1 TOE Internal mutual authentication Hierarchical to No other components. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (38/102 Page) Dependencies No dependencies. FIA_IMA.1.1 The TSF shall perform mutual authentication between [assignment: different parts of TOE] using the [assignment: authentication protocol] that meets the following [assignment: list of standards]. 4.2.2 Specification of Secrets Family Behaviour This family defines requirements for mechanisms that enforce defined quality metrics on provided secrets and generate secrets to satisfy the defined metric. Component leveling The specification of secrets family in CC Part 2 is composed of 2 components. It is now composed of three components, since this PP adds one more component as below. ※ The description on two components included in CC Part 2 is omitted. FIA_SOS.3 Destruction of secrets requires, that the secret information be destroyed according to the specified destruction method, which can be based on the assigned standard. Management: FIA_SOS.3 There are no management activities foreseen. Audit: FIA_SOS.3 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (39/102 Page) The following actions are recommended to record if FAU_GEN Security audit data generation is included in the PP/ST: a) Minimum: Success and failure of the activity 4.2.2.1 FIA_SOS.3 Destruction of Secrets Hierarchical to No other components. Dependencies FIA_SOS.2 TSF Generation of secrets FIA_SOS.3.1 The TSF shall destroy secrets in accordance with a specified secrets destruction method [assignment: secret destruction method] that meets the following: [assignment: list of standards]. 4.3 Security Management (FMT) 4.3.1 ID and pasword Family Behaviour This family defines the capability that is required to control ID and password management used in the TOE, and set or modify ID and/or password by authorized users. Component leveling FMT_PWD.1 ID and password management, requires that the TSF provides the management function of ID and password. Management: FMT_PWD.1 The following actions could be considered for the management functions in FMT: a) Management of ID and password configuration rules. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (40/102 Page) Audit: FMT_PWD.1 The following actions are recommended to record if FAU_GEN Security audit data generation is included in the PP/ST: a) Minimum: All changes of the password 4.3.1.1 FMT_PWD.1 Management of ID and password Hierarchical to No other components. Dependencies FMT_SMF.1 Specification of management functions FMT_SMR.1 Security roles FMT_PWD.1.1 The TSF shall restrict the ability to manage the password of [assignment: list of functions] to [assignment: the authorized identified roles]. 1. [assignment: password combination rules and/or length] 2. [assignment: other management such as management of special characters unusable for password, etc.] FMT_PWD.1.2 The TSF shall restrict the ability to manage the ID of [assignment: list of functions] to [assignment: the authorized identified roles]. 1. [assignment: ID combination rules and/or length] 2. [assignment: other management such as management of special characters unusable for ID, etc.] FMT_PWD.1.3 The TSF shall provide the capability for [selection, choose one of: setting ID and password when installing, setting password when installing, changing the ID and password when the authorized administrator accesses for the first time, changing the password when the authorized administrator accesses for the first time]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (41/102 Page) 4.4 Protection of the TSF (FPT) 4.4.1 Protection of stored TSF data Family Behaviour This family defines rules to protect TSF data stored within containers controlled by the TSF from the unauthorized modification or disclosure. Component leveling FPT_PST.1 Basic protection of stored TSF data, requires the protection of TSF data stored in containers controlled by the TSF. Management: FPT_PST.1 There are no management activities foreseen. Audit: FPT_PST.1 There are no auditable events foreseen. 4.4.1.1 FPT_PST.1 basic protection of stored TSF data Hierarchical to No other components. Dependencies No dependencies. FPT_PST.1.1 The TSF shall protect [assignment: TSF data] stored in containers controlled by the TSF from the unauthorized [selection: disclosure, modification]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (42/102 Page) 4.5 TOE Access (FTA) 4.5.1 Session locking and termination Family Behaviour This family defines requirements for the TSF to provide the capability for TSF-initiated and userinitiated locking, unlocking, and termination of interactive sessions. Component leveling In CC Part 2, the session locking and termination family consists of four components. In this PP, it consists of five components by extending one additional component as follows. ※ The relevant description for four components contained in CC Part 2 is omitted. FTA_SSL.5 The management of TSF-initiated sessions, provides requirements that the TSF locks or terminates the session after a specified time interval of user inactivity. Management: FTA_SSL.5 The following actions could be considered for the management functions in FMT: a) Specification for the time interval of user inactivity that is occurred the session locking and termination for each user KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (43/102 Page) b) Specification for the time interval of default user inactivity that is occurred the session locking and termination Audit: FTA_SSL.5 The following actions are recommended to record if FAU_GEN Security audit data generation is included in the PP/ST: a) Minimum: Locking or termination of interactive session 4.5.1.1 FTA_SSL.5 Management of TSF-initiated sessions Hierarchical to No other components. Dependencies FIA_UAU.1 authentication or No dependencies. FTA_SSL.5.1 FTA_SSL.5.1The TSF shall [Selection: • lock the session and re-authenticate the user before unlocking the session, • terminate] an interactive session after a [assignment: time interval of user inactivity]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (44/102 Page) 5. Security requirements The security requirements specify security functional requirements and assurance requirements that must be satisfied by the TOE that claims conformance to this PP. 5.1 Security functional requirements The security requirements specify security functional requirements and assurance requirements that must be satisfied by the TOE. The security functional requirements included in this PP are derived from CC Part 2 and Chapter 4 Extended Components Definition. The following table summarizes the security functional requirements used in the ST. Security functional class Security functional component FAU FAU_ARP.1 Security alarms FAU_GEN.1 Audit data generation FAU_SAA.1 Potential violation analysis FAU_SAR.1 Audit review FAU_SAR.3 Selectable audit review FAU_STG.3 Action in case of possible audit data loss FAU_STG.4 Prevention of audit data loss FCS FCS_CKM.1 Cryptographic key generation FCS_CKM.2 Cryptographic key distribution FCS_CKM.4 Cryptographic key destruction FCS_COP.1(1) Cryptographic operation(Symmetric key) FCS_COP.1(2) Cryptographic operation(Asymmetric key) FCS_COP.1(3) Cryptographic operation(Digital signature generation) FCS_COP.1(4) Cryptographic operation(Digital signature verification ) KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (45/102 Page) FCS_COP.1(5) Cryptographic operation(HMAC) FCS_COP.1(6) Cryptographic operation(Hash) FCS_RBG.1(Extended) Random bit generatation FIA FIA_AFL.1(1) Authentication failure handling (End-user) FIA_AFL.1(2) Authentication failure handling (Authorized Administrator) FIA_IMA.1(Extended) TOE Internal mutual authentication FIA_SOS.1 Verification of secrets FIA_SOS.2 TSF Generation of secrets FIA_SOS.3(Extended) Destruction of secrets FIA_UAU.2(1) User authentication before any action (End-user) FIA_UAU.2(2) User authentication before any action (Authorized Administrator) FIA_UAU.4(1) Single-use authentication mechanisms (End-user) FIA_UAU.4(2) Single-use authentication mechanisms (Authorized Administrator) FIA_UAU.7(1) Protected authentication feedback (End-user) FIA_UAU.7(2) Protected authentication feedback (Authorized Administrator) FIA_UID.2(1) User identification before any action (End-user) FIA_UID.2(2) User identification before any action (Authorized Administrator) FMT FMT_MOF.1 Management of security functions behaviour FMT_MTD.1 Management of TSF data FMT_PWD.1(Extended) Management of ID and password KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (46/102 Page) (Authorized Administrator) FMT_SMF.1 Specification of management functions FMT_SMR.1 Security roles FPT FPT_ITT.1 Basic internal TSF data transfer protection FPT_PST.1(Extended) Basic protection of stored TSF data FPT_TST.1 TSF testing FTA FTA_MCS.2 Per user attribute Limitation on multiple concurrent sessions FTA_SSL.5(Extended) Management of TSF-initiated sessions FTA_TSE.1 TOE session establishment [Table 5-1] Security functional requirements 5.1.1 Security audit (FAU) 5.1.1.1 FAU_ARP.1 Security alarms Hierarchical to No other components. Dependencies FAU_SAA.1 Potential violation analysis FAU_ARP.1.1 The TSF shall take [ [Table 5-2] Actions of potential security violation ] security violation. Security Violation Action Server Start / Shut down Audit log trail normal user and administrator authentication failed Audit log trail normal user and administrator authentication failure count threshold has been reached. Audit log trail KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (47/102 Page) Audit Trail Threshold Exceeds and Saturates Send mail to authorized administrator However, the audit log trail is unavailable when saturated. Violation of administrator access control policy Audit log trail Failed self-test of cryptographic module that has been verified Process termination License verification at startup, integrity verification failed Process termination Periodic self-test failure Send mail to authorized administrator and Terminate process Periodic Integrity Check Failed Send mail to authorized administrator Audit log overflow and saturation Send mail to authorized administrator However, the audit log trail is unavailable when saturated. [Table 5-2] Actions of potential security violation 5.1.1.2 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 not specified level of audit; and c) [ Refer to the “auditable events” in [Table 5-2] Audit events, [ none ] ] KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (48/102 Page) 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 ST [ Refer to the contents of “additional audit record” in [Table 5-3] Audit events, [ none ] ] Security functional component Auditable event Additional audit record FAU_ARP.1 Actions taken due to potential security violations FAU_SAA.1 Enabling and disabling of any of the analysis mechanisms, Automated responses performed by the tool FAU_STG.3 Actions taken due to exceeding of a threshold FAU_STG.4 Actions taken due to the audit storage failure FCS_CKM.1 Success and failure of the activity FCS_CKM.2 Success and failure of the activity (only applying to key distribution related to the TSF data encryption/decryption) FCS_CKM.4 Success and failure of the activity (only applying to key destruction related to the TSF data encryption/decryption) FCS_COP.1(1) FCS_COP.1(2) FCS_COP.1(3) FCS_COP.1(4) FCS_COP.1(5) FCS_COP.1(6) Success and failure, and the type of cryptographic operation(only applying to items related to the issue, storing, verification, and destruction of a token) FIA_AFL.1(1) FIA_AFL.1(2) The reaching of the threshold for the unsuccessful authentication attempts and the actions taken, and the subsequent, if appropriate, restoration to the normal state KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (49/102 Page) FIA_SOS.2 Rejection by the TSF of any tested secret FIA_SOS.3 (Extended) Success and failure of the activity(applicable to the destruction of SSO token only) FIA_UAU.2(1) FIA_UAU.2(2) All use of the authentication mechanism FIA_UAU.4(1) FIA_UAU.4(2) Attempts to reuse authentication data FIA_UID.2(1) FIA_UID.2(2) All use of the administrator identification mechanism, including the administrator identity provided FMT_MOF.1 All modifications in the behaviour of the functions in the TSF FMT_MTD.1 All modifications to the values of TSF data Modified values of TSF data FMT_PWD.1 (Extended) All changes of the password Modified values of TSF data FMT_SMF.1 Use of the management functions FMT_SMR.1 Modifications to the user group of rules divided FPT_TST.1 Execution of the TSF self tests and the results of the tests Modified TSF data in case of integrity violation FTA_MCS.2 Denial of a new session based on the limitation of multiple concurrent sessions FTA_SSL.5 (Extended) Locking or termination of interactive session FTA_TSE.1 Denial of a session establishment due to the session establishment mechanism All attempts at establishment of a user session [Table 5-3] Audit events KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (50/102 Page) 5.1.1.3 FAU_SAA.1 Potential violation analysis Hierarchical to No other components. Dependencies FAU_GEN.1 Audit data generation FAU_SAA.1.1 The TSF shall be able to apply a set of rules in monitoring the audited events and based upon these rules indicate a potential violation of the enforcement of the SFRs. FAU_SAA.1.2 The TSF shall enforce the following rules for monitoring audited events. a) Accumulation or combination of [ [Table 5-2] Security Violation ] known to indicate a potential security violation b) [ none ] 5.1.1.4 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 [ authorized administrator ] with the capability to read [all the audit data] from the audit records. FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the authorized administrator to interpret the information. 5.1.1.5 FAU_SAR.3 Selectable audit review Hierarchical to No other components. Dependencies FAU_SAR.1 Audit review KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (51/102 Page) FAU_SAR.3.1 The TSF shall provide the ability to apply [ Session ID, Detail, identify of subject(End- user or Administrator ID, End-user or Administrator IP, TOE Components), Date and time of the event, case type, case results (success or fail) of AND condition ] of audit data based on [ default sort by date and time. Optionally, sort descending and ascending by Audit code, requestor, requestip, result, date]. 5.1.1.6 FAU_STG.3 Action in case of possible audit data loss Hierarchical to No other components. Dependencies FAU_STG.1 Protected audit trail storage FAU_STG.3.1 The TSF shall [ Notification to the authorized administrator, [ none ] if the audit trail exceeds [ the threshold set by the authorized administrator (default value 50%)]. 5.1.1.7 FAU_STG.4 Prevention of audit data loss Hierarchical to FAU_STG.3 Action in case of possible audit data loss Dependencies FAU_STG.1 Protected audit trail storage FAU_STG.4.1 The TSF shall ignore audited events and [ Notification to the authorized administrator, [ None ] ] if the audit trail is full. Application notes If the threshold saturation default value exceeds 81%, ignore the audited event or send a warning mail to the authorized administrator. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (52/102 Page) 5.1.2 Cryptographic support (FCS) 5.1.2.1 FCS_CKM.1(1) Cryptographic key generation(1) 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 [ Table 5-4 ] and specified cryptographic key sizes [ Cryptographic key sizes ] that meet the following: [ list of standard ]. list of standard Cryptographic operation Cryptographic algorithm Cryptographic key sizes purpose TTAS.KO-12.0004 Symmetric key encryption SEED (CBC) 128 User data encryption / decryption NIST SP 800-90 Random bit generation HASH-DRBG- SHA256 256 encryption key generation [Table 5-4] TSF Data Encryption 5.1.2.2 FCS_CKM.1(2) Cryptographic key generation(2) 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 [ RSAES ] and specified cryptographic key sizes [ 2048bit ] that meet the following: [ KS X ISO/IEC 18033-2(2006)]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (53/102 Page) 5.1.2.3 FCS_CKM.2 Cryptographic key distribution 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_CKM.2.1 The TSF shall distribute cryptographic keys in accordance with a specified cryptographic key distribution method [ RSAES 2048 ] that meets the following: [ ISO/IEC 18033-2(2006) ]. 5.1.2.4 FCS_CKM.4 Cryptographic key destruction 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4.1 The TSF shall destroy cryptographic keys in accordance with a specified cryptographic key destruction method [ overwrite with 0x00 ] that meets the following: [ none ]. 5.1.2.5 FCS_COP.1(1) Cryptographic operation (Symmetric key) 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (54/102 Page) FCS_COP.1.1 The TSF shall perform [ Encryption Between Components ] in accordance with a specified cryptographic algorithm [ SEED-CBC ] and cryptographic key sizes [ 128 Bit ] that meet the following: [ KO-12.0004/R1(2005), TTAS.KO-12.0025(2003) ]. 5.1.2.6 FCS_COP.1(2) Cryptographic operation (Asymmetric key) 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [ Public key Cryptographic operation ] in accordance with a specified cryptographic algorithm [ RSAES ] and cryptographic key sizes [ 2048 Bit ] that meet the following: [ KS X ISO/IEC 18033-2(2006) ]. 5.1.2.7 FCS_COP.1(3) Cryptographic operation (Digital signature generation) 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [ Digital Signature generation ] in accordance with a specified cryptographic algorithm [ RSA-PSS 2048 ] and cryptographic key sizes [ 2048 Bit ] that meet the following: [ ISO/IEC 14888-2(2008) ]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (55/102 Page) 5.1.2.8 FCS_COP.1(4) Cryptographic operation (Digital signature verification) 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [ Digital Signature verification ] in accordance with a specified cryptographic algorithm [ RSA-PSS 2048 ] and cryptographic key sizes [ 2048 Bit ] that meet the following: [ ISO/IEC 14888-2(2008) ]. 5.1.2.9 FCS_COP.1(5) Cryptographic operation (HMAC) 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 FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [ Generate message authentication code, Mutual authentication between the TOE components, Verification of authentication token ] in accordance with a specified cryptographic algorithm [ HMAC-SHA256 ] and cryptographic key sizes [ 256 Bit ] that meet the following: [ KS X ISO/IEC 97972(2011]. 5.1.2.10 FCS_COP.1(6) Cryptographic operation (Hash) Hierarchical to No other components. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (56/102 Page) Dependencies [FDP_ITC.1 Import of user data without security attributes, or FDP_ITC.2 Import of user data with security attributes, or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction FCS_COP.1.1 The TSF shall perform [ TOE Server and TOE Agent module integrity verification ] in accordance with a specified cryptographic algorithm [ SHA-256 ] and cryptographic key sizes [ 256 Bit ] that meet the following: [ KS X ISO/IEC 101183(2004), ISO/IEC 10118-3 Amd 1(2006) ]. 5.1.2.11 FCS_RBG.1(Extended) Random bit generation Hierarchical to No other components. Dependencies No dependencies. FCS_RBG.1.1 The TSF shall generate random bits required to generate an cryptographic key using the specified random bit generator that meets the following [ ISO/IEC 18031(2011), NIST SP 800-90(2015) ]. 5.1.3 Identification and authentication (FIA) 5.1.3.1 FIA_AFL.1(1) Authentication failure handling(End-user) Hierarchical to No other components. Dependencies FIA_UAU.1 Timing of authentication FIA_AFL.1.1 The TSF shall detect when [ 5 ] unsuccessful authentication attempts occur related to [ authentication of end-user ]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (57/102 Page) FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has been met, the TSF shall [ lock account for disabled 5 minutes ]. 5.1.3.2 FIA_AFL.1(2) Authentication failure handling(Authorized Administrator) Hierarchical to No other components. Dependencies FIA_UAU.1 Timing of authentication FIA_AFL.1.1 The TSF shall detect when [ 5 ] unsuccessful authentication attempts occur related to [ authentication of administrator ]. FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has been met, the TSF shall [ lock account for disabled 5 minutes ]. 5.1.3.3 FIA_IMA.1 Internal mutual authentication Hierarchical to No other components. Dependencies No dependencies. FIA_IMA.1.1 The TSF shall perform mutual authentication between [KSignAccess Server and KSignAccess Agent ] using the [ own authentication protocol ] that meets the following [ None ]. 5.1.3.4 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 [ Acceptance criteria defined below ]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (58/102 Page) - Password length: From 9 up to 16 digits consisting of a combination of uppercase and lowercase English alphabets, numbers and special characters - English alphabets: a – Z (52) - Numbers: 0 – 9 (10) - Special characters: .-/+=_,:!@#$%^*()~{}[]|<>;& (27) - Verifying password rules : Combination of English characters (capital letter, small letter), numbers, and special characters use three or more combinations and lengths must be 9 to 16 digits 5.1.3.5 FIA_SOS.2 TSF Generation of secrets Hierarchical to No other components. Dependencies No dependencies. FIA_SOS.2.1 TSF shall provide a mechanism to generate an authentication token that meet [ authentication time (time stamp), end-user IP, authentication method, UID, extInfo(name, email), state(nonce), HMAC ]. FIA_SOS.2.2 TSF shall be able to enforce the use of TSF-generated authentication token for [ end-user login ]. 5.1.3.6 FIA_SOS.3(Extended) Destruction of secrets Hierarchical to No other components. Dependencies FIA_SOS.2 TSF Generation of secrets FIA_SOS.3.1 The TSF shall destroy authentication tokens in accordance with a specified authentication token destruction method [ overwrite data with 0x30 ] that meets the following: [ None ]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (59/102 Page) 5.1.3.7 FIA_UAU.2(1) User authentication before any action (End-user) Hierarchical to FIA_UAU.1 Timing of authentication Dependencies FIA_UID.1 Timing of identification FIA_UAU.2.1 The TSF shall require each user to be successfully authenticated before allowing any other TSF-mediated actions on behalf of that end-user. 5.1.3.8 FIA_UAU.2(2) User authentication before any action (Authorized Administrator) Hierarchical to FIA_UAU.1 Timing of authentication Dependencies FIA_UID.1 Timing of identification FIA_UAU.2.1 The TSF shall require each user to be successfully authenticated before allowing any other TSF-mediated actions on behalf of that authorized administrator. 5.1.3.9 FIA_UAU.4(1) Single-use authentication mechanisms (End-user) Hierarchical to No other components. Dependencies No dependencies. FIA_UAU.4.1 The TSF shall prevent reuse of authentication data related [password authentication method, authentication token generation information]. 5.1.3.10 FIA_UAU.4(2) Single-use authentication mechanisms (Authorized Administrator) Hierarchical to No other components. Dependencies No dependencies. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (60/102 Page) FIA_UAU.4.1 The TSF shall prevent reuse of authentication data related to [ password authentication scheme ]. 5.1.3.11 FIA_UAU.7(1) Protected authentication feedback (End-user) Hierarchical to No other components. Dependencies FIA_UAU.1 Timing of authentication FIA_UAU.7.1 The TSF shall provide only [Password being entered are masked (password masking with ●) to prevent them from being disclosed on the screen., In case of failure of identification and authentication, feedbacks on the reason for the failure are not provided.] to the End-user while the authentication is in progress. 5.1.3.12 FIA_UAU.7(2) Protected authentication feedback (Authorized Administrator) Hierarchical to No other components. Dependencies FIA_UAU.1 Timing of authentication FIA_UAU.7.1 The TSF shall provide only [Password being entered are masked (password masking with ●) to prevent them from being disclosed on the screen., In case of failure of identification and authentication, feedbacks on the reason for the failure are not provided.] to the Authorized Administrator while the authentication is in progress. 5.1.3.13 FIA_UID.2(1) User identification before any action (End-user) Hierarchical to FIA_UID.1 Timing of identification Dependencies No dependencies. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (61/102 Page) FIA_UID.2.1 The TSF shall require each user to be successfully identified before allowing any other TSF-mediated actions on behalf of that End-user. 5.1.3.14 FIA_UID.2(2) User identification before any action (Authorized Administrator) Hierarchical to FIA_UID.1 Timing of identification Dependencies No dependencies. FIA_UID.2.1 The TSF shall require each user to be successfully identified before allowing any other TSF-mediated actions on behalf of that authorized administrator. 5.1.4 Security management (FMT) 5.1.4.1 FMT_MOF.1 Management of security functions behaviour Hierarchical to No other components. Dependencies FMT_SMR.1 Security roles FMT_SMF.1 Specification of Management Functions FMT_MOF.1.1 The TSF shall restrict the ability to conduct management actions the functions in [ [Table 5-5] list of security functions management ] to [assignment: the authorised identified roles]. SFR Component Security Function Administrator Type FAU_ARP.1 Management of actions (addition, removal, modification) to be taken Top Administrator FAU_SAA.1 Maintenance of the rules (addition, removal and modification of the rules in the rule group) Top Administrator FAU_SAR.1 Maintenance (deletion, modification, addition) of the Top Administrator, KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (62/102 Page) group of users with read access right to the audit records Audit Administrator FAU_STG.3 Maintenance (deletion, modification, addition) of actions to be taken in case of imminent audit storage failurer Top Administrator FAU_STG.4 Maintenance (deletion, modification, addition) of actions to be taken in case of audit storage failure. Top Administrator FIA_AFL.1(1) FIA_AFL.1(2) Management of the threshold for unsuccessful authentication attempts Top Administrator Management of actions to be taken in the event of an authentication failure Top Administrator FIA_SOS.1 Management of the metric used to verify the secrets Top Administrator FIA_UAU.2 Management of the authentication data by an administrator Top Administrator FIA_UID.2 Management of the administrator and end-user identities Top Administrator FMT_MOF.1 Management of the group of roles that can interact with the functions in the TSF Top Administrator FMT_MTD.1 Management of the group of roles that can interact with the TSF data Top Administrator FMT_SMR.1 Management of the group of users that are part of a role. Top Administrator FPT_ITT.1 Management of the mechanism used to provide the protection of the data in transit between different parts of the TSF Top Administrator FPT_TST.1 Management of the conditions under which TSF self testing occurs, such as during intial start-up. Regular interval, or under specified conditions Management of the time interval if appropriate Top Administrator [Table 5-5] List of security functions management KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (63/102 Page) 5.1.4.2 FMT_MTD.1 Management of TSF data Hierarchical to No other components. Dependencies FMT_SMF.1 Specification of Management Functions FMT_SMR.1 Security roles FMT_MTD.1.1 The TSF shall restrict the ability to manage the [ [Table 5-6] list of TSF data] to [ authorized administrator ]. SFR Component Management Function Administrator Type FAU_STG.3 Maintenance (deletion, modification, addition) of actions to be taken in case of imminent audit storage failure Top Administrator FAU_STG.4 Maintenance (deletion, modification, addition) of actions to be taken in case of audit storage failure. Top Administrator FIA_AFL.1 Management of the threshold for unsuccessful authentication attempts Top Administrator FIA_UAU.2 Management of the authentication data by an administrator, Management of the authentication data by the associated end-user Top Administrator FIA_UID.2 Management of the administrator and end-user identities Top Administrator FMT_MOF.1 Management of the group of roles that can interact with the functions in the TSF Top Administrator FMT_MTD.1 Management of the group of roles that can interact with the TSF data Top Administrator FMT_SMR.1 Management of the group of users that are part of a role. Top Administrator FPT_ITT.1 Management of the mechanism used to provide the protection of the data in transit between different parts of the TSF Top Administrator KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (64/102 Page) FTA_TSE.1 Management of the conditions under which TSF self testing occurs, such as during intial start-up. regular interval, or under specified conditions Top Administrator [Table 5-6] list of TSF data 5.1.4.3 FMT_PWD.1(Extended) Management of ID and password (Authorized Administrator) Hierarchical to No other components. Dependencies FMT_SMF.1 Specification of Management Functions FMT_SMR.1 Security roles FMT_PWD.1.1 The TSF shall restrict the ability to manage the password of [ N/A ] to [ the authorized administrator ]. FMT_PWD.1.2 The TSF shall restrict the ability to manage the ID of [ N/A ] to [ the authorized administrator ]. FMT_PWD.1.3 The TSF shall provide the capability for changing the password when the authorized administrator accesses for the first time. 5.1.4.4 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: [ Management of functions of the TSF: Management functions specified in FMT_MOF.1 Management of TSF data: Management functions spectified in FMT_MTD.1 ] KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (65/102 Page) 5.1.4.5 FMT_SMR.1 Security role Hierarchical to No other components. Dependencies FIA_UID.1 Timing of identification FMT_SMR.1.1 The TSF shall maintain the roles [ as the authorized identified roles ] - Top Administrator - Audit Administrator FMT_SMR.1.2 The TSF shall be able to associate users and their roles defined in FMT_SMR.1.1. 5.1.5 Protection of the TSF (FPT) 5.1.5.1 FPT_ITT.1 Basic Internal TSF data transfer protection Hierarchical to No other components. Dependencies No dependencies. FPT_ITT.1.1 The TSF shall protect TSF data from disclosure, modification when it is transmitted between separate parts of the TOE. 5.1.5.2 FPT_PST.1(Extended) Basic protection of stored TSF data Hierarchical to No other components. Dependencies No dependencies. The TSF should protect the [ TSF data ] stored in the repository, which is controlled by the TSF, from unauthorized exposure and modification. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (66/102 Page) 5.1.5.3 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 during initial start-up, periodically during normal operation to demonstrate the correct operation of the TSF. FPT_TST.1.2 The TSF shall provide authorized administrators with the capability to verify the integrity of TSF data. FPT_TST.1.3 The TSF shall provide authorized administrators with the capability to verify the integrity of TSF. 5.1.6 TOE access (FTA) 5.1.6.1 FTA_MCS.2 Per user attribute limitation on multiple concurrent sessions Hierarchical to FTA_MCS.1 Basic limitation on multiple concurrent sessions Dependencies FIA_UID.1 Timing of identification FTA_MCS.2.1 The TSF shall restrict the maximum number of concurrent sessions that belong to the same user according to the rules [ restriction to one for the maximum number of concurrent sessions for administrator management access session, prohibition of same administrator both concurrent connections of management access session and local access session that belong to the same user ] FTA_MCS.2.2 The TSF shall enforce, by default, a limit of [ 1 ] sessions per user. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (67/102 Page) 5.1.6.2 FTA_SSL.5(Extended) Management of TSF-initiated sessions Hierarchical to No other components. Dependencies FIA_UAU.1 Authentication or No dependencies. FTA_SSL.5.1 The TSF shall [ terminate ] an interactive session after a [ 10 minutes ]. 5.1.6.3 FTA_TSE.1 TOE session establishment Hierarchical to No other components. Dependencies No dependencies. FTA_TSE.1.1 The TSF shall be able to deny administrator’s management access session establishment based on [ connection IP, whether or not to activate the management access session of administrator account with the same privilege, [None] ]. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (68/102 Page) 5.2 Security assurance requirements Assurance requirements of this Protection Profile are comprised of assurance components in CC part 3, and the evaluation assurance level is EAL1+. The following table summarizes assurance components. Security assurance class Security assurance component Security Target evaluation ASE_INT.1 ST introduction ASE_CCL.1 Conformance claims ASE_OBJ.1 Security objectives for the operational environment ASE_ECD.1 Extended components definition ASE_REQ.1 Stated security requirements ASE_TSS.1 TOE summary specification Development ADV_FSP.1 Basic functional specification Guidance documents AGD_OPE.1 Operational user guidance AGD_PRE.1 Preparative procedures Life-cycle support ALC_CMC.1 Labelling of the TOE ALC_CMS.1 TOE CM coverage Tests ATE_FUN.1 Functional testing ATE_IND.1 Independent testing - conformance Vulnerability assessment AVA_VAN.1 Vulnerability survey [Table 5-7] Security assurance requirements KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (69/102 Page) 5.2.1 Security Target evaluation 5.2.1.1 ASE_INT.1 ST introduction Dependencies No dependencies. Developer action elements ASE_INT.1.1D The developer shall provide an ST introduction. Content and presentation elements ASE_INT.1.1C The ST introduction shall contain an ST reference, a TOE reference, a TOE overview and a TOE description. ASE_INT.1.2C The ST reference shall uniquely identify the ST. ASE_INT.1.3C The TOE reference shall uniquely identify the TOE. ASE_INT.1.4C The TOE overview shall summarise the usage and major security features of the TOE. ASE_INT.1.5C The TOE overview shall identify the TOE type. ASE_INT.1.6C The TOE overview shall identify any non-TOE hardware/software/firmware required by the TOE. ASE_INT.1.7C The TOE description shall describe the physical scope of the TOE. ASE_INT.1.8C The TOE description shall describe the logical scope of the TOE. Evaluator action elements ASE_INT.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. ASE_INT.1.2E The evaluator shall confirm that the TOE reference, the TOE overview, and the TOE description are consistent with each other. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (70/102 Page) 5.2.1.2 ASE_CCL.1 Conformance claims Dependencies ASE_INT.1 ST Introduction ASE_ECD.1 Extended components definition ASE_REQ.1 Stated security requirements Developer action elements ASE_CCL.1.1D The developer shall provide a conformance claim. ASE_CCL.1.2D The developer shall provide a conformance claim rationale. Content and presentation elements ASE_CCL.1.1C The conformance claim shall contain a CC conformance claim that identifies the version of the CC to which the ST and the TOE claim conformance. ASE_CCL.1.2C The CC conformance claim shall describe the conformance of the ST to CC Part 2 as either CC Part 2 conformant or CC Part 2 extended. ASE_CCL.1.3C The CC conformance claim shall describe the conformance of the ST to CC Part 3 as either CC Part 3 conformant or CC Part 3 extended. ASE_CCL.1.4C The CC conformance claim shall be consistent with the extended components definition. ASE_CCL.1.5C The conformance claim shall identify all PPs and security requirement packages to which the ST claims conformance. ASE_CCL.1.6C The conformance claim shall describe any conformance of the ST to a package as either package-conformant or package-augmented. ASE_CCL.1.7C The conformance claim rationale shall demonstrate that the TOE type is consistent with the TOE type in the PPs for which conformance is being claimed. ASE_CCL.1.8C The conformance claim rationale shall demonstrate that the statement of the security problem definition is consistent with the statement of the security problem definition in the PPs for which conformance is being claimed. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (71/102 Page) ASE_CCL.1.9C The conformance claim rationale shall demonstrate that the statement of security objectives is consistent with the statement of security objectives in the PPs for which conformance is being claimed. ASE_CCL.1.10C The conformance claim rationale shall demonstrate that the statement of security requirements is consistent with the statement of security requirements in the PPs for which conformance is being claimed. Evaluator action elements ASE_CCL.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. 5.2.1.3 ASE_OBJ.1 Security objectives for the operational environment Dependencies No dependencies. Developer action elements ASE_OBJ.1.1D The developer shall provide a statement of security objectives. Content and presentation elements ASE_OBJ.1.1C The statement of security objectives shall describe the security objectives for the operational environment. Evaluator action elements ASE_OBJ.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (72/102 Page) 5.2.1.4 ASE_ECD.1 Extended components definition Dependencies No dependencies. Developer action elements ASE_ECD.1.1D The developer shall provide a statement of security requirements. ASE_ECD.1.2D The developer shall provide an extended components definition. Content and presentation elements ASE_ECD.1.1C The statement of security requirements shall identify all extended security requirements. ASE_ECD.1.2C The extended components definition shall define an extended component for each extended security requirement. ASE_ECD.1.3C The extended components definition shall describe how each extended component is related to the existing CC components, families, and classes. ASE_ECD.1.4C The extended components definition shall use the existing CC components, families, classes, and methodology as a model for presentation. ASE_ECD.1.5C The extended components shall consist of measurable and objective elements such that conformance or nonconformance to these elements can be demonstrated. Evaluator action elements ASE_ECD.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. ASE_ECD.1.2E The evaluator shall confirm that no extended component can be clearly expressed using existing components. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (73/102 Page) 5.2.1.5 ASE_REQ.1 Stated security requirements Dependencies ASE_ECD.1 Extended components definition Developer action elements ASE_REQ.1.1D The developer shall provide a statement of security requirements. ASE_REQ.1.2D The developer shall provide a security requirements rationale. Content and presentation elements ASE_REQ.1.1C The statement of security requirements shall describe the SFRs and the SARs. ASE_REQ.1.2C All subjects, objects, operations, security attributes, external entities and other terms that are used in the SFRs and the SARs shall be defined. ASE_REQ.1.3C The statement of security requirements shall identify all operations on the security requirements. ASE_REQ.1.4C All operations shall be performed correctly. ASE_REQ.1.5C Each dependency of the security requirements shall either be satisfied, or the security requirements rationale shall justify the dependency not being satisfied. ASE_REQ.1.6C The statement of security requirements shall be internally consistent. Evaluator action elements ASE_REQ.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. 5.2.1.6 ASE_TSS.1 TOE summary specification Dependencies ASE_INT.1 ST introduction ASE_REQ.1 Stated security requirements ADV_FSP.1 Basic functional specification KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (74/102 Page) Developer action elements ASE_TSS.1.1D The developer shall provide a TOE summary specification. Content and presentation elements ASE_TSS.1.1C The TOE summary specification shall describe how the TOE meets each SFR. Evaluator action elements ASE_TSS.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. ASE_TSS.1.2E The evaluator shall confirm that the TOE summary specification is consistent with the TOE overview and the TOE description. 5.2.2 Development 5.2.2.1 ADV_FSP.1 Basic functional specification Dependencies No dependencies. Developer action elements ADV_FSP.1.1D The developer shall provide a functional specification. ADV_FSP.1.2D The developer shall provide a tracing from the functional specification to the SFRs. Content and presentation elements ADV_FSP.1.1C The functional specification shall describe the purpose and method of use for each SFR-enforcing and SFR-supporting TSFI. ADV_FSP.1.2C The functional specification shall identify all parameters associated with each SFR- enforcing and SFR-supporting TSFI. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (75/102 Page) ADV_FSP.1.3C The functional specification shall provide rationale for the implicit categorization of interfaces as SFR-non-interfering. ADV_FSP.1.4C The tracing shall demonstrate that the SFRs trace to TSFIs in the functional specification. Evaluator action elements ADV_FSP.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. ADV_FSP.1.2E The evaluator shall determine that the functional specification is an accurate and complete instantiation of the SFRs. 5.2.3 Guidance documents 5.2.3.1 AGD_OPE.1 Operational user guidance Dependencies ADV_FSP.1 Basic functional specification Developer action elements AGD_OPE.1.1D The developer shall provide operational user guidance. Content and presentation elements AGD_OPE.1.1C The operational user guidance shall describe, for each user role, the user-accessible functions and privileges that should be controlled in a secure processing environment, including appropriate warnings. AGD_OPE.1.2C The operational user guidance shall describe, for each user role, how to use the available interfaces provided by the TOE in a secure manner. AGD_OPE.1.3C The operational user guidance shall describe, for each user role, the available functions and interfaces, in particular all security parameters under the control of the user, indicating secure values as appropriate. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (76/102 Page) AGD_OPE.1.4C The operational user guidance shall, for each user role, clearly present each type of security-relevant event relative to the user-accessible functions that need to be performed, including changing the security characteristics of entities under the control of the TSF. AGD_OPE.1.5C The operational user guidance shall identify all possible modes of operation of the TOE (including operation following failure or operational error), their consequences and implications for maintaining secure operation. AGD_OPE.1.6C The operational user guidance shall, for each user role, describe the security measures to be followed in order to fulfil the security objectives for the operational environment as described in the ST. AGD_OPE.1.7C The operational user guidance shall be clear and reasonable. Evaluator action elements AGD_OPE.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. 5.2.3.2 AGD_PRE.1 Preparative procedures Dependencies No dependencies. Developer action elements AGD_PRE.1.1D The developer shall provide the TOE including its preparative procedures. Content and presentation elements AGD_PRE1.1C The preparative procedures shall describe all the steps necessary for secure acceptance of the delivered TOE in accordance with the developer's delivery procedures. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (77/102 Page) AGD_PRE1.2C The preparative procedures shall describe all the steps necessary for secure installation of the TOE and for the secure preparation of the operational environment in accordance with the security objectives for the operational environment as described in the ST. Evaluator action elements AGD_PRE.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. AGD_PRE.1.2E The evaluator shall apply the preparative procedures to confirm that the TOE can be prepared securely for operation. 5.2.4 Life-cycle support 5.2.4.1 ALC_CMC.1 TOE Labelling of the TOE Dependencies ALC_CMS.1 TOE CM coverage Developer action elements ALC_CMC.1.1D The developer shall provide the TOE and a reference for the TOE. Content and presentation elements ALC_CMC.1.1C The TOE shall be labelled with its unique reference. Evaluator action elements ALC_CMC.1.1E The evaluator shall confirm that the information provided meet requirements for content and presentation of evidence. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (78/102 Page) 5.2.4.2 ALC_CMS.1 TOE CM coverage Dependencies No dependencies. Developer action elements ALC_CMS.1.1D The developer shall provide a configuration list for the TOE. Content and presentation elements ALC_CMS.1.1C The configuration list shall include the following: the TOE itself; and the evaluation evidence required by the SARs. ALC_CMS.1.2C The configuration list shall uniquely identify the configuration items. Evaluator action elements ALC_CMS.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. 5.2.5 Tests 5.2.5.1 ATE_FUN.1 Functional testing Dependencies ATE_COV.1 Evidence of coverage Developer action elements ATE_FUN.1.1D The developer shall test the TSF and document the results. ATE_FUN.1.2D The developer shall provide test documentation. Content and presentation elements KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (79/102 Page) ATE_FUN.1.1C The test documentation shall consist of test plans, expected test results and actual test results. ATE_FUN.1.2C The test plans shall identify the tests to be performed and describe the scenarios for performing each test. These scenarios shall include any ordering dependencies on the results of other tests. ATE_FUN.1.3C The expected test results shall show the anticipated outputs from a successful execution of the tests. ATE_FUN.1.4C The actual test results shall be consistent with the expected test results. Evaluator action elements ATE_FUN.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. 5.2.5.2 ATE_IND.1 Independent testing - conformance Dependencies ADV_FSP.1 Basic functional specification AGD_OPE.1 Operational user guidance AGD_PRE.1 Preparative procedures Developer action elements ATE_IND.1.1D The developer shall provide the TOE for testing. Content and presentation elements ATE_IND.1.1C The TOE shall be suitable for testing. Evaluator action elements ATE_IND.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (80/102 Page) ATE_IND.1.2E The evaluator shall test a subset of the TSF to confirm that the TSF operates as specified. 5.2.6 Vulnerability assessment 5.2.6.1 AVA_VAN.1 Vulnerability survey Dependencies ADV_FSP.1 Basic functional specification AGD_OPE.1 Operational user guidance AGD_PRE.1 Preparative procedures Developer action elements AVA_VAN.1.1D The developer shall provide the TOE for testing. Content and presentation elements AVA_VAN.1.1C The TOE shall be suitable for testing. Evaluator action elements AVA_VAN.1.1E The evaluator shall confirm that the information provided meets all requirements for content and presentation of evidence. AVA_VAN.1.2E The evaluator shall perform a search of public domain sources to identify potential vulnerabilities in the TOE. AVA_VAN.1.3E The evaluator shall conduct penetration testing, based on the identified potential vulnerabilities, to determine that the TOE is resistant to attacks performed by an attacker possessing Basic attack potential. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (81/102 Page) 5.3 Security requirements rationale 5.3.1 Dependency rationale of security functional requirements No. Security functional requirements Dependency Reference No. 1 FAU_ARP.1 FAU_SAA.1 3 2 FAU_GEN.1 FPT_STM.1 OE.Time stamp 3 FAU_SAA.1 FAU_GEN.1 2 4 FAU_SAR.1 FAU_GEN.1 2 5 FAU_SAR.3 FAU_SAR.1 4 6 FAU_STG.3 FAU_STG.1 OE.DBMS 7 FAU_STG.4 FAU_STG.1 OE.DBMS 8 FCS_CKM.1(1) [FCS_CKM.2 or FCS_COP.1] 10, 12, 16 FCS_CKM.4 11 9 FCS_CKM.1(2) [FCS_CKM.2 or FCS_COP.1] 13, 14, 15 FCS_CKM.4 11 10 FCS_CKM.2 [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 8 FCS_CKM.4 11 11 FCS_CKM.4 [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 8 12 FCS_COP.1(1) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 8 FCS_CKM.4 11 13 FCS_COP.1(2) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 9 FCS_CKM.4 11 14 FCS_COP.1(3) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 9 FCS_CKM.4 11 15 FCS_COP.1(4) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 9 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (82/102 Page) FCS_CKM.4 11 16 FCS_COP.1(5) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] 8 FCS_CKM.4 11 17 FCS_COP.1(6) [FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1] - FCS_CKM.4 - 18 FCS_RBG.1 - - 19 FIA_IMA.1 - - 20 FIA_AFL.1(1) FIA_UAU.1 25 21 FIA_AFL.1(2) FIA_UAU.1 26 22 FIA_SOS.1 - - 23 FIA_SOS.2 - - 24 FIA_SOS.3 FIA_SOS.2 23 25 FIA_UAU.2(1) FIA_UID.1 31 26 FIA_UAU.2(2) FIA_UID.1 32 27 FIA_UAU.4(1) - - 28 FIA_UAU.4(2) - - 29 FIA_UAU.7(1) FIA_UAU.1 25 30 FIA_UAU.7(2) FIA_UAU.1 26 31 FIA_UID.2(1) - - 32 FIA_UID.2(2) - - 33 FMT_MOF.1 FMT_SMF.1 36 FMT_SMR.1 37 34 FMT_MTD.1 FMT_SMF.1 36 FMT_SMR.1 37 35 FMT_PWD.1 FMT_SMF.1 36 FMT_SMR.1 37 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (83/102 Page) 36 FMT_SMF.1 - - 37 FMT_SMR.1 FIA_UID.1 32 38 FPT_ITT.1 - - 39 FPT_PST.1 - - 40 FPT_STM.1 - - 41 FPT_TST.1 - - 42 FTA_MCS.2 FIA_UID.1 32 43 FTA_SSL.5 FIA_UAU.2 or No dependencies 25, 26 44 FTA_TSE.1 - - [Table 5-8] Rationale for the dependency of the security functional requirements - FAU_GEN.1 has a dependent relationship with FPT_STM.1 and this uses reliable time stamp provided by the TOE operating environment and records tests related to security. Therefore, it satisfies the security goal time stamp for operating environments. - FAU_STG.3 and FAU_STG.4 have dependent relationships with FAU_STG.1 and this is satisfied by the DBMS operating environment. - FCS_COP.1(6) have dependent relationships with FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1 and FCS_CKM.4 and this is satisfied because the hash algorithm does not use cryptographic keys. - FIA_AFL.1(1), FIA_UAU.7(1) have dependent relationships with FIA_UAU.1 and this is satisfied by FIA_UAU.2(1) that have hierarchal relations with FIA_UAU.1 - FIA_AFL.1(2), FIA_UAU.7(2) have dependent relationships with FIA_UAU.1 and this is satisfied by FIA_UAU.2(2) that have hierarchal relations with FIA_UAU.1 - FTA_SSL.5 have dependent relationships with FIA_UAU.1 and this is satisfied by FIA_UAU.2(1), FIA_UAU.2(2) that have hierarchal relations with FIA_UAU.1 - FIA_UAU.2(1) have dependent relationships with FIA_UID.1 and this is satisfied by FIA_UID.2(1) that have hierarchal relations with FIA_UID.1 - FIA_UAU.2(2), FMT_SMR.1, FTA_MCS.2 have dependent relationships with FIA_UID.1 and this is satisfied by FIA_UID.2(1) that have hierarchal relations with FIA_UID.1 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (84/102 Page) 5.3.2 Dependency rationale of security assurance requirements The dependency of EAL1 assurance package provided in the CC is already satisfied, the rationale is omitted. The augmented SAR ATE_FUN.1 has dependency on ATE_COV.1. but, ATE_FUN.1 is augmented to require developer testing in order to check if the developer correctly performed and documented the tests in the test documentation, ATE_COV.1 is not included in this ST since it is not necessarily required to show the correspondence between the tests and the TSFIs. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (85/102 Page) 6. TOE Summary Specification 6.1 Security Audit (FAU) 6.1.1 Security Alert The TOE applies a rule set indicating a potential security violation to the audit log to perform security alart in case of violation event. Security Violation Action Server Start / Shut down Audit log trail normal user and administrator authentication failed Audit log trail normal user and administrator authentication failure count threshold has been reached. Audit log trail Audit Trail Threshold Exceeds and Saturates Send mail to authorized administrator However, the audit log trail is unavailable when saturated. Violation of administrator access control policy Audit log trail Failed self-test of cryptographic module that has been verified Process termination License verification at startup, integrity verification failed Process termination Periodic self-test failure Send mail to authorized administrator and Terminate process Periodic Integrity Check Failed Send mail to authorized administrator Audit log overflow and saturation Send mail to authorized administrator However, the audit log trail is unavailable when saturated. [표 6-1] potential security violation event KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (86/102 Page) 6.1.2 Audit data generation Generate audit data for security events of each TOE component. The generated audit data is stored in a DBMS provided by the operating environment. The TOE uses the trusted time stamp provided in the environment where the TOE operates in order to ensure that the audit data is generated sequentially. Audit events are generated and stored by Session ID, Detail, subject identity (end-user or administrator ID, end-user or administrator IP, TOE components), date and time of event, type of event and success / failure. The auditable events generated are as follows. Security functional component Auditable event Additional audit record FAU_ARP.1 Actions taken due to potential security violations FAU_SAA.1 Enabling and disabling of any of the analysis mechanisms, Automated responses performed by the tool FAU_STG.3 Actions taken due to exceeding of a threshold FAU_STG.4 Actions taken due to the audit storage failure FCS_CKM.1 Success and failure of the activity FCS_CKM.2 Success and failure of the activity (only applying to key distribution related to the TSF data encryption/decryption) FCS_CKM.4 Success and failure of the activity (only applying to key destruction related to the TSF data encryption/decryption) FCS_COP.1(1) FCS_COP.1(2) FCS_COP.1(3) FCS_COP.1(4) FCS_COP.1(5) FCS_COP.1(6) Success and failure, and the type of cryptographic operation(only applying to items related to the issue, storing, verification, and destruction of a token) KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (87/102 Page) FIA_AFL.1(1) FIA_AFL.1(2) The reaching of the threshold for the unsuccessful authentication attempts and the actions taken, and the subsequent, if appropriate, restoration to the normal state FIA_SOS.2 Rejection by the TSF of any tested secret FIA_SOS.3(Extended) Success and failure of the activity(applicable to the destruction of SSO token only) FIA_UAU.2(1) FIA_UAU.2(2) All use of the authentication mechanism FIA_UAU.4(1) FIA_UAU.4(2) Attempts to reuse authentication data FIA_UID.2(1) FIA_UID.2(2) All use of the administrator identification mechanism, including the administrator identity provided FMT_MOF.1 All modifications in the behaviour of the functions in the TSF FMT_MTD.1 All modifications to the values of TSF data Modified values of TSF data FMT_PWD.1(Extended) All changes of the password Modified values of TSF data FMT_SMF.1 Use of the management functions FMT_SMR.1 Modifications to the user group of rules divided FPT_TST.1 Execution of the TSF self tests and the results of the tests Modified TSF data in case of integrity violation FTA_MCS.2 Denial of a new session based on the limitation of multiple concurrent sessions FTA_SSL.5(Extended) Locking or termination of interactive session FTA_TSE.1 Denial of a session establishment due to the session establishment mechanism All attempts at establishment of a user session [Table 6-2] Audit event KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (88/102 Page) 6.1.3 Audit data review The TOE stores the audit data in the audit trail storage (DBMS) and provides the authorized administrator with the function to inquire all the audit data so as to be suitable for interpreting the information from the audit record. It is possible to query by Session ID, Detail, identity of subject (general user or administrator ID, general user or manager IP, TOE component), date and time of event, type of event and AND condition of success / failure of event. The authorized administrator (top administrator, audit administrator) can inquire and retrieve the audit data through the security management interface of KSignAccess Server. 6.1.4 Audit repository inspection and security violation response The audit records generated by the TOE are stored in the repository (DBMS) provided by the TOE operational environment. Only the authorized administrator can access the audit record DB through the repository and perform the audit record clearance work. The TOE periodically checks the space of the audit record storage and generates an audit record of the excess events when it exceeds the remaining space of the storage set by the authorized administrator and sends an alarm (warning mail) to the authorized administrator. When the audit record storage is possible audit data loss, the TOE ignores the audit contents and sends an alarm (warning mail) to the administrator to protect the audit records. - The threshold excess rate for the total capacity of audit records storage space is 50% by default, and the range of values that can be set by the administrator is 50%. Alarm (send warning mail) to an authorized administrator when the threshold is exceeded. - The threshold saturation ratio for the total capacity of audit records storage space is 81% by default and the range of values that can be set by the administrator is 81%. Ignoring the audited event upon saturation of the threshold, alerts (send warning mail) to the authorized administrator. 6.1.5 SFR Mapping SFR to be satisfied: FAU_ARP.1, FAU_GEN.1, FAU_SAA.1, FAU_SAR.1, FAU_SAR.3, FAU_STG.3, FAU_STG.4 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (89/102 Page) 6.2 Cryptographic Support (FCS) The TOE is cryptographic support using the validated cryptographic module KSignCASE64 v2.5 in the policy transmission sector to support the cryptographic functions between the TOE components. Details of the validated cryptographic module included in the TOE are as follows. Item Specification Cryptographic module name KSignCrypto for Java V1.0.1.0 Developer KSign Co., Ltd. Validation date May 08, 2020 Validation level VSL1 Validation number CM-167-2025.5 [Table 6-3] Specific information of validated cryptographic module 6.2.1 Cryptographic support Encryption of TSF data is performed by symmetric key encryption operation. The encryption key generates 128bit long encryption keys through HMAC (SHA256) and HASH_DRBG algorithms in PKCS#5 PBKDF2 that conform to ISO/IEC 18031 (2011) and NIST SP 800-90 standards. In order to protect TSF data transmitted inside the TOE, the communication object generates a certificate (private key, public key) and completes mutual authentication through an electronic signature. The session key is generated by the KSign Access Agent and applies the RSAES standard. After encrypting the public key in the certificate of the KSign Access Server, it is distributed to the KSign Access Server. The generated and distributed encryption keys are encrypted with the certificate of the KSign Access Server and stored securely. When communicating between TOE components, the cryptographic key is loaded into memory by each module, decrypted through the private key, and used for encryption / decryption operations. When generating cryptographic key for Symmetric Key Cryptographic operation, 128bit cryptographic key length and 128bit initial vector are generated by HASH_DRBG algorithm which meets ISO / IEC 18031 (2011) and NIST SP 800-90 standard. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (90/102 Page) When generating cryptographic key for Asymmetric Key (Public Key) Cryptographic operation, 2048bit cryptographic key length are generated by RSAES algorithm which meets ISO/IEC 18033- 2(2006) standard. When distributing the cryptographic key, the key distribution is performed in a self-implemented with reference to RFC5652 (Cryptographic Message Syntax). The cryptographic key stored in the memory during key generation, distribution, and operation is overwritten with data 0x00 after expiration of the validity period, and the cryptographic key is destroyed. Cryptograph ic key storage location Destroyed method Destruction object Destruction point Memory Overwrite with “0x00” public key, private key, TSF DEK, KEK Immediately after use Memory Overwrite with “0x00” Session Key Time when communication ended Memory Overwrite with “0x00” Transmission Data Encryption Key Time when communication ended - The supported cryptographic algorithms use the validated cryptographic module, and the algorithm information for each application is as follows. Category Algorithm Key length Standard TSF Data encryption key protection(KEK) HMAC-SHA256 256bits ISO/IEC 9797-2 TSF Data SEED-CBC 128bits TTAS.KO-12.0004 Transmission Data Integrity Server Integrity RSA-PSS 2048bits ISO/IEC 14888-2 Agent Integrity, Authentication token Integrity HMAC-SHA256 256bits ISO/IEC 9797-2 Stored Data TOE Module, TSF Data SHA256 N/A ISO/IEC 10118-3 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (91/102 Page) Integrity Integrity Key Exchange RSAES 2048bits ISO/IEC 18033-2 Section encryption (session key) SEED-CBC 128bits TTAS.KO-12.0004 Transmission Data Encryption SEED-CBC 128bits TTAS.KO-12.0004 Authentication token Encryption/Decryption SEED-CBC 128bits TTAS.KO-12.0004 Administrator / End User password encryption SHA256 N/A ISO/IEC 10118-3 [Table 6-4] Algorithm information 6.2.2 Random generate The TOE generates a random bit necessary for cryptographic key generation using the HASH_DRBG algorithm through a random bit generator of KSignCrypto for Java V1.0.1.0, which is a validated cryptographic module whose safety and implementation conformity is validated through a cryptographic module verification system. 6.2.3 SFR Mapping SFR to be satisfied: FCS_CKM.1, FCS_CKM.2, FCS_CKM.4, FCS_COP.1(1), FCS_COP.1(2), FCS_COP.1(3), FCS_COP.1(4), FCS_COP.1(5), FCS_COP.1(6), FCS_RBG.1(Extended) 6.3 Identification and Authentication (FIA) The TOE identifies all users (administrators and end-users) to access. Until the identification is achieved, the administrator and the IT entity attempting access can not use any functions of the TOE. All users (administrators and end-users) are identification and authentication through the ID and password-based certification process. Even if the user successfully completes the self-identification and authentication procedure, access is restricted according to the IP address-based access control function. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (92/102 Page) An authorized administrator accesses the TOE security management interface through a web browser to perform security management of the TOE. At this time, identification and authentication procedures are performed through the login screen, and only the authorized administrator who has been successfully identified and authenticated provides the function to use the security management function provided by the TOE. 6.3.1 Authentication failure response The TOE protects the TOE from malicious user authentication attempts by providing the user (administrator and end-user) account lock function in user identification and authentication. In case of administrator, KSignAccess Server prints out "No administrator information does not exist or the password does not match" to the web browser screen so that the authentication mechanism failure reason information can not be known when authentication fails. If the number of authentication failures of the account reaches 5 times, the account lock is performed and the lock is enabled automatically after 5 minutes. The TOE displays the "administrator account status is locked" to the user attempting to authenticate through the locked account. After outputting the authentication failure cause information window, the authentication is failed and the audit data is generated. A user whose account is unlocked can normally use the functions provided by the TOE upon successful completion of user identification and authentication. In case of end-user, If the number of authentication failures of the account reaches 5 times, the account lock is performed and the lock is enabled automatically after 5 minutes. 6.3.2 Protection of authentication data When the end-user accesses the TOE, the identification and authentication process operates on the basis of ID and password. The password entered by the user during the authentication mechanism is displayed as “●” instead of the original character, thereby preventing leakage of the authentication information. In case of authentication failure of the end-user, only the authentication failure message to provide. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (93/102 Page) Only administrators with IP addresses (up to two) allowed by the authorized administrator (top administrator) can access the TOE by enforcing the security management access control. When the administrator accesses the TOE, the identification and authentication process operates on the basis of ID and password. The password entered by the administrator during the authentication mechanism is displayed as “●” instead of the original character, thereby preventing leakage of the authentication information. In case of authentication failure of the administrator, only the authentication failure message to provide. 6.3.3 Password policy validation When generating and changing the passwords of the end-user or the authorized administrator, it verifies the allowable characters, combination rule, minimum / maximum length validity of the password value according to the password policy, and enforces each verification criterion. In the case of an authorized administrator, the security management interface is forced to change the password when performing initial identification and authentication, and the password verification mechanism is the same as the mechanism for generating and changing. The TOE provides the following specified secret information verification mechanism when generating and changing the password. - Password length: From 9 up to 16 digits consisting of a combination of uppercase and lowercase English alphabets, numbers and special characters - English alphabets: a – Z (52) - Numbers: 0 – 9 (10) - Special characters: .-/+=_,:!@#$%^*()~{}[]|<>;& (27) 6.3.4 Authentication data prevents To prevent the reuse of authentication information, the TOE provides the following. - Prevention of reuse of administrator authentication information: To prevent CSRF (Cross Site Request Forgery) attacks, use 'SPRING SECURITY' to restrict access. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (94/102 Page) - Prevent reuse of end-user authentication information: When accessing the KSign Access Agent, end users perform identification and authentication using an authentication token issued from the server. And when creating an authentication token, the nonce value used as disposable authentication data, including the timestamp used, the session ID, and the generated authentication token are destroyed immediately without being stored so as not to be reused. When performing user page login, authentication is performed through ID and password, and Nonce is assigned to each page before user authentication to prevent cross side request fogery (CSRF) attacks. If the allocated nonce is not transmitted together, access is restricted. 6.3.5 Mutual authentication The TOE performs mutual authentication through the self-implemented protocol between KSignAccess Server and KSignAccess Agent, and the detailed mechanism for mutual authentication is as follows. 1. When registering KSignAccess Agent in security management interface, Agent Identifier and Agent Secret values for mutual authentication with KSignAccess Server are generated. KSignAccess Agent generates authentication message (HMAC SHA256) and transmits it to KSignAccess Server through HTTP communication to request mutual authentication. - request header -> AccessAgent_Authroization:base64(Agent Gid + Agent Identifier) - request Body -> { alg: HS256, signature: hmac(state, Agent Secret), state: state } 2. The KSignAccess Server verifies the mutual authentication request of the KSignAccess Agent through mutual authentication request (HMAC) of the following authentication message received for the mutual authentication request of the KSignAccess Agent. - request header validation (Agent Gid, Agent Identifier validation) - request body validation (signature validation in body) 3. KSignAccess Server verifies KSignAccess Agent and generates digital signature value (RSAPSS) using KSignAccess Server's private key and sends a response message to KSignAccess Agent. - response body -> { alg: PS256, signature: RSAPSSwithSHA256(KSignAccess server_state + KSignAccess agent_state, server private key), state: KSignAccess server_state } KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (95/102 Page) 4. KSignAccess Agent receives mutual authentication response of KSignAccess Server and verifies digital signature value (RSAPSS) and completes mutual authentication with KSignAccess Server. - verify_signature((KSignAccess server_state + KSignAccess agent_state), KSignAccess Server Certificate) 6.3.6 Authentication token generate and distruction The TOE generates the authentication token using the validated cryptographic module KSignCrypto for Java V1.0.1.0 when generating the authentication token, and enforces the use of the authentication token for the login of the end-user. Detailed information of the validated cryptographic module included in the TOE is as follows. Item Specification Cryptographic module name KSignCrypto for Java V1.0.1.0 Developer KSign Co., Ltd. Validation date May 08, 2020 Validation level VSL1 Validation number CM-167-2025.5 [Table 6-5] Specific information of validated cryptographic module When KSignAccess Agent requests creation of authentication tokens, it generates a state with a single-use authentication value through a validated cryptographic module random number generator and performs encryption operation with SEED-CBC by including the state in the request, and examines integrity of authentication token by generating HMAC data. The protocol of the authentication token is as follows. Timestamp Client IP AuthenMethod Subject Extend_information HMAC After the authentication token is used, the authentication token is discarded by overwriting the data with '0x30'. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (96/102 Page) - When encryption key related information is deleted : When the encryption key delete function is called, when the trusted channel is terminated (logout), or when the authentication token verification is completed 6.3.7 SFR Mapping SFR to be satisfied: FIA_AFL.1(1), FIA_AFL.1(2), FIA_IMA.1(Extended), FIA_SOS.1, FIA_SOS.2, FIA_SOS.3(Extended), FIA_UAU.2(1), FIA_UAU.2(2), FIA_UAU.4(1), FIA_UAU.4(2), FIA_UAU.7(1), FIA_UAU.7(2), FIA_UID.2(1), FIA_UID.2(2) 6.4 Security Management (FMT) 6.4.1 Management of Security functions behaviour The security management access control function is invoked only when the TOE performs the enforced identification and authentication function successfully. Only the administrator who has allowed the authorized administrator (top administrator) to access the security management interface is allowed. The TOE provides the authorized administrator with management functions for the following security functions. SFR Component Security Function Administrator Type FAU_ARP.1 Management of actions (addition, removal, modification) to be taken Top Administrator FAU_SAA.1 Maintenance of the rules (addition, removal and modification of the rules in the rule group) Top Administrator FAU_SAR.1 Maintenance (deletion, modification, addition) of the group of users with read access right to the audit records Top Administrator, Audit Administrator FAU_STG.3 Maintenance (deletion, modification, addition) of actions to be taken in case of imminent audit storage failurer Top Administrator FAU_STG.4 Maintenance (deletion, modification, addition) of actions to be taken in case of audit storage failure. Top Administrator KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (97/102 Page) FIA_AFL.1(1) FIA_AFL.1(2) Management of the threshold for unsuccessful authentication attempts Top Administrator Management of actions to be taken in the event of an authentication failure Top Administrator FIA_SOS.1 Management of the metric used to verify the secrets Top Administrator FIA_UAU.2 Management of the authentication data by an administrator Top Administrator FIA_UID.2 Management of the administrator and end-user identities Top Administrator FMT_MOF.1 Management of the group of roles that can interact with the functions in the TSF Top Administrator FMT_MTD.1 Management of the group of roles that can interact with the TSF data Top Administrator FMT_SMR.1 Management of the group of users that are part of a role. Top Administrator FPT_ITT.1 Management of the mechanism used to provide the protection of the data in transit between different parts of the TSF Top Administrator FPT_TST.1 Management of the conditions under which TSF self testing occurs, such as during intial start-up. Regular interval, or under specified conditions Management of the time interval if appropriate Top Administrator [Table 6-6] List of security functions management 6.4.2 ID and Password management The authorized administrator forces the password to be changed at the first access to the security management interface. In case of the audit administrator, the password must be changed after the password is reset by the authorized administrator. The authorized administrator can change the password of the administrator or end-user through the security management interface. When generating and changing the passwords of the end-user and the authorized administrator, the validity of the password value is verified according to the password policy. The TOE provides the following verification mechanism when generating the password. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (98/102 Page) - Password length: From 9 up to 16 digits consisting of a combination of uppercase and lowercase English alphabets, numbers and special characters - English alphabets: a – Z (52) - Numbers: 0 – 9 (10) - Special characters: .-/+=_,:!@#$%^*()~{}[]|<>;& (27) 6.4.3 SFR Mapping SFR to be satisfied: FMT_MOF.1, FMT_MTD.1, FMT_PWD.1(Extended), FMT_SMF.1, FMT_SMR.1 6.5 Protection of the TSF 6.5.1 Internal TSF data transfer protection In order to protect the TSF data between TOE components, the TOE protects the communication sector using the validated cryptographic module KsignCrypto for Java V1.0.1.0 in the policy transmission interval as follows. 1. KSignAccess Agent generates key and distributes it to KSignAccess Server 2. KSignAccess Sever and KSignAccess Agent authentication through digital signature generation and verification with RSA-PSS (2048bit) / SHA256 digital signature algorithm 3. RSAES (2048bit) Asymmetric Key (Public Key) Cryptographic operation performed on generated key 4. The distributed key is managed by the RSAES (2048bit) certificate of each TOE component. 5. Provides integrity with SEED-CBC data encryption algorithm and HMAC-SHA256 algorithm with distributed encryption key 6.5.2 Protection of stored TSF data The TOE encrypts and stores the protected TSF data to protect against unauthorized disclosure and modification of the stored TSF data. The protected TSF data list and applied cryptographic algorithm are as follows. KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (99/102 Page) TSF Data Applied Algorithms and Data administrator password SHA256(password) User password SHA256(password) authentication token SEED-CBC(token) key encryption key SEED-CBC(token) Key security parameters (secret key) SEED-CBC(token) Key security parameters (private key) SEED-CBC(token) TOE set value SEED-CBC(token) Transmission Data HMAC Key SEED-CBC(token) Integrity Value SHA256(data) [Table 6-7] Protection of stored TSF data 6.5.3 TSF Self Tests The TSF self-test demonstrates the correct operation of the TSF and provides the ability for the authorized administrator to verify that the integrity of the TSF data is not compromised through self- testing. The TOE performs self-tests periodically during normal operation (12 hours) at the start-up of the TOE to verify correct operation of all TSFs. - Self Test List TOE Item Server Self-test to verify the password module License Check Process Check Integrity Check Authentication Token Issuance Test Agent Self-test to verify the password module License Check KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (100/102 Page) Process Check Integrity Check Authentication Token Verification Test The TOE generates a hash value for the integrity check and process check objects for the self test at the specified inspection cycle and compares it with the hash value (reference value) stored at the initial operation. At this time, if the integrity violation is found, the TOE notifies the authorized administrator and generates the audit data through the security management interface. After the authorized administrator has successfully completed the identification and authentication, the TOE can update the hash value of the integrity object through the TOE security management interface. The TOE performs integrity check on all configuration files and modules such as the security policy file necessary for the TOE operation. The TOE audits and records the results of the self-test, the integrity check, and the actions of the authorized administrator. 6.5.4 Integrity Tests The integrity check function determines whether the TSF data and TSF executables are tampered. The authorized administrator performs the integrity check on the KSignAccess Server. Compares the stored HMAC value with the HMAC value when the integrity check is performed and verifies whether the data is correct. Integrity verification uses the HMAC-SHA256 algorithm. - Server Integrity CheckList Library name Explanation KSignAccess-common-4.1.2.jar SSO common library KSignAccessServer-4.1.2.jar SSO Server library KSignAccessServer-core-4.1.2.jar KSignAccessServer-secure-4.1.1.jar KSignCrypto_for_Java_v1.0.1.0.jar KCMVP library KSignLicenseVerify-2.7.8.jar License Verification Library log4j-api-2.17.1.jar Log library log4j-core-2.17.1.jar log4j-web-2.17.1.jar javax.mail-1.6.2.jar JavaMail library (Send mail) KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (101/102 Page) mysql-connector-java-8.0.27.jar Mysql Database Related Libraries server.conf TOE Configuration File - Agent Integrity CheckList Library name Explanation KSignAccess-common-4.1.2.jar SSO common library KSignAccessAgent-4.1.2.jar SSO Server library KSignCrypto_for_Java_v1.0.1.0.jar KCMVP library KSignLicenseVerify-2.7.8.jar License Verification Library log4j-api-2.17.1.jar Log library log4j-core-2.17.1.jar log4j-web-2.17.1.jar storage.conf TOE Configuration File The conditions for the integrity check are as follows. TOE Component Integrity check occurrence condition KSignAccess Server During initial start-up periodically during normal operation (every 12 hours) KSignAccess Agent [Table 6-8] Integrity check occurrence condition 6.5.5 SFR Mapping SFR to be satisfied: FPT_ITT.1, FPT_PST.1(Extended), FPT_TST.1 KSignAccess V4.1 Security Target V1.3 Dept. QA Author Yu Beodeul Edit Date 2022-03-21 Version V1.3 No. KSignAccess V4.1 Security Target V1.3 Copyright© KSign Co., Ltd. (102/102 Page) 6.6 TOE Access (FTA) 6.6.1 Administrator Session Restrictions The TOE limits the maximum number of concurrent sessions belonging to the same administrator to one in accordance with the administrator re-connection request rule (access permission IP) authorized by the same account or privilege after accessing the administrator for the top administrator, After connecting to the management server, if the other administator with the same account, the administrator's previous connection session terminate. In addition, the administrator access session is allowed according to the administrator access permission IP (two IP addresses by default) registered through the security management interface, and the unauthorized IP restricts the connection session. In the case of the audit administrator, the access session is restricted according to the access permission IP rule and the audit data on the result of the session restriction of the security management interface is generated. 6.6.2 Locking the Session in the Security Management Interface When the TOE is normally distributed and installed, the authorized administrator accesses the TOE security management interface through the web browser of the administrator's PC. The TOE permits access to the security management interface (HTTPS) only when the administrator attempting to access the connection that has been explicitly granted access has successfully completed the identification and authentication process. The TOE terminates the session that interacts with the authorized administrator when the authorized administrator logs in to the security management interface (Web UI) of the TOE and then exceeds the inactivity elapse period. The inactivity elapsed period is set to a default value of 10 minutes and can not be changed. At the end of the session, the TOE disables all actions through the existing session and terminates the session. The TOE generates a new session only when the administrator re- authentication (administrator identification and authentication) has been successfully completed and the access to the security management interface is permitted when the authorized administrator who has disabled all actions re-attempts to use the security management. The TOE generates audit data on the result of these events, the result of performing the session lock of the security management interface. 6.6.3 SFR Mapping SFR to be satisfied: FTA_MCS.2, FTA_SSL.5(Extended), FTA_TSE.1