Copyright (C) 2008-2009, Canon Inc. All rights reserved.
Date of publication: February 2, 2009
Canon MFP Security Chip
Security Target
Version 1.05
February 2, 2009
Canon Inc.
This document is a translation of the evaluated and certified security
target written in Japanese
Copyright (C) 2008-2009, Canon Inc. All rights reserved.
i
Revision History
Version Date Reason for Change Author Reviewer Approver
1.00 Mar 21, 2008 First draft. Adachi
Date of creation:
Mar 21, 2008
Adachi
Date of review:
Mar 21, 2008
Makitani
Date of approval:
Mar 21, 2008
1.01 Aug 19, 2008 Changes made based on comments. Adachi
Date of creation:
Aug 19, 2008
Adachi
Date of review:
Aug 19, 2008
Makitani
Date of approval:
Aug 19, 2008
1.02 Sep 26, 2008 Changes made based on comments. Adachi
Date of creation:
Sep 26, 2008
Adachi
Date of review:
Sep 26, 2008
Makitani
Date of approval:
Sep 26, 2008
1.03 Oct 29, 2008 Changes made based on comments. Adachi
Date of creation:
Oct 29, 2008
Adachi
Date of review:
Oct 29, 2008
Makitani
Date of approval:
Oct 29, 2008
1.04 Jan 30, 2009 Changes made based on comments. Adachi
Date of creation:
Jan 30, 2009
Adachi
Date of review:
Jan 30, 2009
Makitani
Date of approval:
Jan 30, 2009
1.05 Feb 2, 2009 Changes made based on comments. Adachi
Date of creation:
Feb 2, 2009
Adachi
Date of review:
Feb 2, 2009
Makitani
Date of approval:
Feb 2, 2009
Copyright (C) 2008-2009, Canon Inc. All rights reserved.
ii
Table of Contents
1. ST Introduction............................................................................................................................................1
1.1 ST Identification......................................................................................................................................1
1.1.1 ST Identification and Management .................................................................................................1
1.1.2 TOE Identification and Management ..............................................................................................1
1.1.3 CC Identification..............................................................................................................................1
1.2 ST Overview...........................................................................................................................................2
1.3 CC Conformance ...................................................................................................................................2
1.4 References.............................................................................................................................................2
1.5 Notations, Terms and Abbreviations.......................................................................................................3
1.5.1 Notations.........................................................................................................................................3
1.5.2 Terms and Abbreviations.................................................................................................................4
2. TOE Description ..........................................................................................................................................5
2.1 Product Type ..........................................................................................................................................5
2.2 Overview ................................................................................................................................................5
2.2.1 Purpose of Use of the TOE.............................................................................................................5
2.2.2 Persons Associated with the TOE...................................................................................................5
2.2.3 Method of Use of the TOE ..............................................................................................................5
2.2.4 Operating Environment of the TOE.................................................................................................5
2.3 TOE Configuration..................................................................................................................................6
2.3.1 Physical Configuration of the TOE..................................................................................................6
2.3.2 Logical Configuration of the TOE....................................................................................................8
2.4 Assets.....................................................................................................................................................9
3. TOE Security Environment.......................................................................................................................10
3.1 Assumptions.........................................................................................................................................10
3.2 Threats .................................................................................................................................................10
3.3 Organizational Security Policies...........................................................................................................10
4. Security Objectives ...................................................................................................................................11
4.1 Security Objectives for the TOE...........................................................................................................11
4.2 Security Objectives for the Environment..............................................................................................11
5. IT Security Requirements .........................................................................................................................12
5.1 TOE Security Requirements ................................................................................................................12
5.1.1 TOE Security Functional Requirements........................................................................................12
5.1.2 TOE Security Assurance Requirements .......................................................................................18
5.2 Security Requirements for the IT Environment ....................................................................................19
5.2.1 Security Functional Requirements for the IT Environment ...........................................................19
5.3 Strength of Security Functions .............................................................................................................20
6. TOE Summary Specification ....................................................................................................................21
6.1 TOE Security Functions .......................................................................................................................21
6.1.1 HDD Data Encryption Function (F.HDD_CRYPTO)......................................................................21
6.1.2 Cryptographic Key Management Function (F.KEY_MANAGE)....................................................21
6.1.3 Device Identification and Authentication Function (F.KIT_CHECK) .............................................22
6.2 Strength of Security Functions .............................................................................................................23
6.3 Assurance Measures ...........................................................................................................................23
7. PP Claims ...................................................................................................................................................25
8. Rationale ....................................................................................................................................................26
8.1 Security Objectives Rationale ..............................................................................................................26
8.2 Security Requirements Rationale.........................................................................................................27
8.2.1 Rationale for Security Functional Requirements ..........................................................................27
Copyright (C) 2008-2009, Canon Inc. All rights reserved.
iii
8.2.2 Dependencies of TOE Security Functional Requirements ...........................................................29
8.2.3 Interactions between TOE Security Functional Requirements .....................................................30
8.2.4 Rationale for Minimum Strength of Function Level.......................................................................30
8.2.5 Rationale for Security Assurance Requirements ..........................................................................30
8.3 TOE Summary Specification Rationale................................................................................................32
8.3.1 Appropriateness of Security Functional Requirements for TOE Summary Specification.............32
8.3.2 Rationale for Strength of Function Level for Security Functions...................................................33
8.3.3 Rationale for Assurance Measures...............................................................................................33
8.4 PP Claim Rationale ..............................................................................................................................37
Copyright (C) 2008-2009, Canon Inc. All rights reserved.
iv
List of Figures
Figure 2-1 : TOE Usage environment ...........................................................................................................6
Figure 2-2 : TOE physical configuration........................................................................................................7
Figure 2-3 : TOE logical configuration...........................................................................................................8
Copyright (C) 2008-2009, Canon Inc. All rights reserved.
v
List of Tables
Table 1-1: Terms and abbreviations ..............................................................................................................4
Table 2-1 : Roles of the components in the TOE usage environment...........................................................6
Table 2-2 : Roles of TOE components ..........................................................................................................7
Table 5-1: TOE assurance requirements components................................................................................18
Table 6-1: TOE assurance measures..........................................................................................................23
Table 8-1: Mapping between TOE security environment and security objectives.......................................26
Table 8-2: Mapping between security objectives and TOE security functional requirements .....................27
Table 8-3: TOE security functional requirements dependencies.................................................................29
Table 8-4: Interactions between TOE security functional requirements......................................................30
Table 8-5: Mapping between TOE summary specification and security functional requirements...............32
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
1
1. ST Introduction
This chapter presents ST identification information, an overview of the ST, claims of CC conformance and
referenced documents, as well as notations, terms and abbreviations used in this document.
1.1 ST Identification
1.1.1 ST Identification and Management
Title: Canon MFP Security Chip Security Target
ST version: 1.05
Date of creation: February 2, 2009
Authors: Canon Inc.
1.1.2 TOE Identification and Management
Name: Canon MFP Security Chip
TOE version: 2.00
Manufacturer: Canon Inc.
1.1.3 CC Identification
Common Criteria for Information Technology Security Evaluation, Version 2.3
Japanese version of these documents, which are published by the Certification Body of Japan Information
Technology Security Evaluation and Certification Scheme, are referenced.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
2
1.2 ST Overview
This ST describes the security chip that is mounted on the HDD Data Encryption Kit C Series option boards
for Canon’s multifunction products and printers.
The TOE is the Canon MFP Security Chip, which is provided to users as a TOE-mounted HDD Data
Encryption Kit.
With this TOE, the built-in hard drives of Canon’s multifunction products and printers can be protected from
confidential information leaks through theft of the hard drive with no trade-off in extensibility, versatility,
convenience or performance.
The TOE offers the following security functions for hard drive data protection.
HDD Data Encryption
Cryptographic Key Management
Device Identification and Authentication
1.3 CC Conformance
This ST conforms to the following CC specifications.
CC Part 2 conformant
CC Part 3 conformant
EAL3 conformant
There are no Protection Profiles claimed to which this ST is conformant.
1.4 References
y Common Criteria for Information Technology Security Evaluation – Part 1: Information and general model,
dated August 2005, version 2.3, CCMB-2005-08-001
y Common Criteria for Information Technology Security Evaluation – Part 2: Security functional
requirements, dated August 2005, version 2.3, CCMB-2005-08-002
y Common Criteria for Information Technology Security Evaluation – Part 3: Security assurance
requirements, dated August 2005, version 2.3, CCMB-2005-08-003
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
3
1.5 Notations, Terms and Abbreviations
1.5.1 Notations
The assumptions, threats and organizational security policies in Chapter 3 and the security objectives in
Chapter 4 are denoted with labels in boldface type and subsequent definitions in regular type.
In chapter 5 IT Security Requirements, the Refinements section is underlined. Also, each of the security
requirements for the IT environment is noted with an "[E]".
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
4
1.5.2 Terms and Abbreviations
The terms and abbreviations used in this ST are defined in Table 1-1.
Table 1-1: Terms and abbreviations
Abbrev and Terms Definition
Canon MFP/printer A general term that refers to a Canon-made multifunction product or printer.
HDD The built-in hard disk drive of a Canon MFP/printer.
HDD Data Encryption Kit A board with a security chip that is aimed at providing security enhancements.
It has a physical interface to a Canon MFP/printer and its HDD.
HDD Data Encryption &
Mirroring Kit C Series
A collective term for a specific series of HDD Data Encryption Kits using the TOE
as a security chip.
The HDD Data Encryption Kits in the HDD Data Encryption & Mirroring Kit C
Series lineup are completely identical in terms of functionality and the security
chip used: they only differ in the product name and the board shape that has a
different design for each target Canon MFP/printer model.
In the following part of this ST, the term “HDD Data Encryption Kit” refers to any
HDD Data Encryption & Mirroring Kit in the C Series lineup.
The HDD Data Encryption & Mirroring Kit C Series includes the following
products.
English version: HDD Data Encryption & Mirroring Kit-C Series
French version: Kit d'encryptage et d’ écriture des données disque dur-Série C
Disk analysis tool A general term that refers to any tool that allows viewing the contents of sectors
on hard drives.
List of Supported Options A list that indicates the support status of HDD Data Encryption & Mirroring Kit C
Series, and the HDD Data Encryption Kits that are available for each Canon
MFP/Printer model. Consumers will find this list in their Canon MFP/printer
product catalogs.
Serial ATA Serial ATA is a standard for connecting a storage device, which uses serial
transmission to transfer data.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
5
2. TOE Description
This chapter describes the product type, an overview and the scope of the TOE, as well as the assets to be
protected by the TOE.
2.1 Product Type
The TOE is an encryption security chip. It is an IT product designed for mounting on the HDD Data
Encryption & Mirroring Kit C Series boards that enhance the security of Canon MFPs/printers.
2.2 Overview
2.2.1 Purpose of Use of the TOE
When a Canon MFP/printer is used, user input data is stored in the HDD.
This TOE is used for the purpose of countering the problem of leakage of HDD data by way of theft of the
HDD. By using the TOE, data writes to the HDD can be encrypted without limiting the extensibility and
processing performance of the Canon MFP/printer.
2.2.2 Persons Associated with the TOE
Persons associated with the TOE are identified as follows.
No special roles or privileges are required for using the TOE.
User
Any person using a Canon MFP/printer. Users can benefit from the functions of the TOE by installing the
HDD Data Encryption Kit into a Canon MFP/printer and using its capabilities, e.g., copying, printing and
scanning.
2.2.3 Method of Use of the TOE
The TOE is provided to users as a Canon MFP/printer HDD Data Encryption Kit and the HDD Data
Encryption Kit is used as installed in a Canon MFP/printer. Once the HDD Data Encryption Kit installed, any
HDD access that occurs through the use of the Canon MFP/printer capabilities will be done via the TOE.
2.2.4 Operating Environment of the TOE
The TOE operates mounted on the HDD Data Encryption Kit and the HDD Data Encryption Kit operates
installed in a C Series-ready Canon MFP/printer. Installable HDD Data Encryption Kits can be identified in
the Canon MFP/printer option list (a list of available options for every model in the Canon MFP/printer
lineups).
Users can refer to this option list to find out if and which model in the HDD Data Encryption & Mirroring Kit C
Series lineup is available for their Canon MFPs/printers. However, it should be noted that there is no HDD
Data Encryption Kit in the HDD Data Encryption & Mirroring Kit C-series lineup that works with any Canon
MFP/printer that does not support the HDD Data Encryption & Mirroring Kit C Series boards.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
6
2.3 TOE Configuration
2.3.1 Physical Configuration of the TOE
Figure 2-1 illustrates the environment in which the TOE is used. In the figure, the TOE is shown in gray.
Figure 2-1 : TOE usage environment
Table 2-1 describes the roles of each of the components in Figure 2-1.
Table 2-1 : Roles of the components in the TOE usage environment
Name Role
Mother board The circuit board within the Canon MFP/printer. The HDD Data
Encryption Kit is mounted on this motherboard.
HDD Data Encryption Kit The circuit board on which the TOE is mounted.
TOE The TOE described in this specification.
HDD The Disk in which data is stored. The TOE has the mirroring function and
up to two HDDs can be connected to the TOE.
Of note, the interface between the mother board and the TOE, and the interface between the TOE and the
HDD, are Serial ATA.
HDD Data Encryption Kit
HDD
Canon MFP/printer
Mother board
TOE
HDD
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
7
Figure 2-2 below, illustrates the detailed configuration of the TOE from Figure 2-1.
Figure 2-2 : TOE physical configuration
Table 2-2 describes the roles of the components composing the TOE.
Table 2-2 : Roles of TOE components
Name Role
Register Temporarily stores program instructions and computation results.
Work memory Volatile memory which stores data and programs.
Cryptographic keys are stored in this memory.
CPU Executes programs stored in memory.
Flash ROM Non-volatile memory storing the firmware that controls the TOE. Stores
authentication ID and seed information.
Disk I/O An interface that processes I/O requests to the TOE.
Encryption processing engine Encrypts and decrypts data.
TOE
Register
Work
memory
Disk I/O
CPU
Encryption
Processing
engine
Flash ROM
Firmware
Authentication ID
and
Seed information
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
8
2.3.2 Logical Configuration of the TOE
Figure 2-3 shows the logical configuration of the TOE. In the figure, TOE security functions are shown in
gray.
Figure 2-3 : TOE logical configuration
As depicted in Figure 2-3, users use the TOE through operation of the Canon MFP/printer.
(1) By installing the TOE into the Canon MFP/printer, the Canon MFP/printer can register in Flash ROM, the
seed information for use by the Cryptographic Key Management function and an authentication ID for
use by the Device Identification and Authentication function, thanks to the Canon MFP/printer installation
process. The term “registered device” will be used hereafter to refer to a Canon MFP/printer that is
registered by the Canon MFP/printer installation process as the original host of the TOE.
Of note, an authentication ID contains identification information about the Canon MFP/printer having the
HDD Data Encryption Kit for which it has been issued.
(2) Once the user powers on the Canon MFP/printer, the TOE can confirm whether the Canon MFP/printer it
is using is the “registered device”, thanks to the Device Identification and Authentication function. If the
Canon MFP/printer being used is confirmed as the “registered device”, the TOE generates a
cryptographic key in work memory to be used by the HDD Data Encryption function, using the
Cryptographic Key Management function.
: Process and data flow
HDD Data Encryption Kit
HDD
Assets
TOE
Device Identification
and Authentication
Cryptographic Key
Management
MFP/printer
job functions
MFP/printer
installation
MFP/printer
Startup process
Canon MFP/printer
HDD Data
Encryption
HDD Mirroring
Use of job
functions
Power on
TOE installation
Cryptographic Key
Work memory
Authentication
ID
Seed
information
Flash ROM
: TSF data flow
Assets
User
operation
of
the
Canon
MFP/printer
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
9
(3) When the user uses the Canon MFP/printer’s job functions, such as copying and printing, the TOE can
encrypt and decrypt data writes and reads to/from the HDD, thanks to the HDD Data Encryption function.
The TOE also has a mirroring function that allows data to be written simultaneously to two HDDS and
data to be read from one HDD, while those Canon MFP/printer job functions are being executed. In this
case, the TOE encrypts data writes to both HDDs and decrypts data reads from the one HDD. Note
however, that the TOE can operate in either a single-HDD or dual-HDD configuration.
The TOE provides the security functions summarized below. As can be seen in Figure 2-3, there is no other
way for users to impact the TOE security functions than operating the Canon MFP/printer.
¾ HDD Data Encryption
This function encrypts data writes to the HDD and decrypts data reads from the HDD.
¾ Cryptographic Key Management
This function generates and manages cryptographic keys for use by the HDD Data Encryption function. It
generates cryptographic keys using the seed information that was registered at the time of TOE
installation. Cryptographic keys are stored in volatile work memory and hence disappear when the Canon
MFP/printer is powered off.
¾ Device Identification and Authentication
This function confirms if the Canon MFP/printer with the TOE currently installed is the “registered device”,
using the authentication ID that was registered at the time of TOE installation.
It prohibits any HDD access unless it confirms that the TOE is connected to the “registered device”, which
means if the Canon MFP/printer being used by the user is truly the “registered device”, the user will be
granted unlimited access to the HDD via the TOE.
The TOE provides the general (non-security) function summarized below.
¾ HDD Mirroring
This function enables to store the same data on two HDDs and to use one of the HDDs as a backup of the
other in case of malfunctions. This function operates only in a dual-HDD configuration, and only when the
HDD mirroring function is set to “ENABLE”.
2.4 Assets
The TOE provides functions to protect the Canon MFP/printer built-in HDD from the risk of being removed
and analyzed.
That is, the assets to be protected by the TOE are any data that is written to the HDD as a result of a user’s
use of the Canon MFP/printer.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
10
3. TOE Security Environment
This chapter describes the assumptions, threats and organizational security policies that are applicable to
the TOE.
3.1 Assumptions
There are no assumptions which the TOE assumes.
3.2 Threats
The following assumes that the attack potential of the attacker is low.
T.HDD_ACCESS
A malicious individual may attempt to disclose the data on the HDD by removing and directly accessing the
HDD using a disk analysis tool or another Canon MFP/printer.
T.WRONG_BOARD
A malicious individual may attempt to disclose the data on the HDD by moving the HDD Data Encryption Kit
and the HDD from the “registered device” to another Canon MFP/printer and accessing the HDD via the
HDD Data Encryption Kit.
3.3 Organizational Security Policies
There are no organizational security policies with which the TOE must comply.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
11
4. Security Objectives
4.1 Security Objectives for the TOE
This section describes the security objectives for the TOE to counter the threats and achieve the
organizational security policies.
O.CRYPTO
The TOE shall prevent the data on the HDD from being analyzed even if the HDD is directly accessed using
a disk analysis tool or another Canon MFP/printer, i.e., the TOE shall perform the following processing:
¾ Encrypting data writes to the HDD
¾ Decrypting data reads from the HDD
O.BOARD_AUTH
The TOE shall prevent any attempt to access the HDD via the TOE from any other Canon MFP/printer than
the “registered device” from succeeding, i.e., the TOE shall perform the following processes:
¾ Confirming that it is connected to the “registered device”
¾ Permitting HDD access via itself only when it is connected to the “registered device”
4.2 Security Objectives for the Environment
OE.UNIQUE_INFO
The Canon MFP/printer generates an authentication ID that is unique to each individual device.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
12
5. IT Security Requirements
5.1 TOE Security Requirements
This section describes the security requirements that the TOE must satisfy.
5.1.1 TOE Security Functional Requirements
FCS_CKM.1 Cryptographic key generation
Hierarchical to: No other components.
FCS_CKM.1.1
The TSF shall generate cryptographic keys in accordance with a specified cryptographic key generation
algorithm [assignment: cryptographic key generation algorithm] and specified cryptographic key sizes
[assignment: cryptographic key sizes] that meet the following: [assignment: list of standards].
[assignment: list of standards]
‚ FIPS 186-2
[assignment: cryptographic key generation algorithm]
‚ A FIPS 186-2-based cryptographic key generation algorithm
[assignment: cryptographic key sizes]
‚ 256 bits
Dependencies: [FCS_CKM.2 Cryptographic key distribution or
FCS_COP.1 Cryptographic operation]
FCS_CKM.4 Cryptographic key destruction
FMT_MSA.2 Secure security attributes
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
13
FCS_COP.1 Cryptographic operation
Hierarchical to: No other components.
FCS_COP.1.1
The TSF shall perform [assignment: list of cryptographic operations] in accordance with a specified
cryptographic algorithm [assignment: cryptographic algorithm] and cryptographic key sizes [assignment:
cryptographic key sizes] that meet the following: [assignment: list of standards].
[assignment: list of standards]
‚ FIPS PUB 197
[assignment: cryptographic algorithm]
‚ AES
[assignment: cryptographic key sizes]
‚ 256 bits
[assignment: list of cryptographic operations]
‚ Encryption of data writes to the HDD
‚ Decryption of data reads from the HDD
Dependencies: [FDP_ITC.1 Import of user data without security attributes, or
FCS_CKM.1 Cryptographic key generation]
FCS_CKM.4 Cryptographic key destruction
FMT_MSA.2 Secure security attributes
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
14
FIA_UAU.2 User authentication before any action
Hierarchical to: FIA_UAU.1
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 user.
Refinement: “User” → Registered device
: "Each user"→ Each Canon MFP/Printer
Dependencies: FIA_UID.1 Timing of identification
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
15
FIA_UAU.4 Single-use authentication mechanisms
Hierarchical to: No other components.
FIA_UAU.4.1
The TSF shall prevent reuse of authentication data related to [assignment: identified authentication
mechanism(s)].
[assignment: identified authentication mechanism(s)]
‚ The authentication mechanism employed for registered device authentication
Dependencies: No dependencies.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
16
FIA_UID.2 User identification before any action
Hierarchical to: FIA_UID.1
FIA_UID.2.1
The TSF shall require each user to identify itself before allowing any other TSF-mediated actions on
behalf of that user.
Refinement: “User” → Registered device
: "Each user"→ Each Canon MFP/Printer
Dependencies: No dependencies.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
17
FPT_RVM.1 Non-bypassability of the TSP
Hierarchical to: No other components.
FPT_RVM.1.1
The TSF shall ensure that TSP enforcement functions are invoked and succeed before each function
within the TSC is allowed to proceed.
Dependencies: No dependencies.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
18
5.1.2 TOE Security Assurance Requirements
The TOE assurance level claimed in this ST is EAL3. The assurance components are listed in Table 5-1.
The assurance elements within each assurance component claimed are conformant to CC Part 3.
Note that the ASE class has been adopted such that its assurance requirements must be satisfied
regardless of the target assurance level.
Table 5-1: TOE assurance requirements components
TOE Security Assurance Requirement Component
Configuration management Authorization controls ACM_CAP.3
TOE CM coverage ACM_SCP.1
Delivery and operation Delivery procedures ADO_DEL.1
Installation, generation, and start-up procedures ADO_IGS.1
Development Informal functional specification ADV_FSP.1
Security enforcing high-level design ADV_HLD.2
Informal correspondence demonstration ADV_RCR.1
Guidance documents Administrator guidance AGD_ADM.1
User guidance AGD_USR.1
Life cycle support Identification of security measures ALC_DVS.1
Tests Analysis of coverage ATE_COV.2
Testing: high-level design ATE_DPT.1
Functional testing ATE_FUN.1
Independent testing - sample ATE_IND.2
Vulnerability assessment Examination of guidance AVA_MSU.1
Strength of TOE security function evaluation AVA_SOF.1
Developer vulnerability analysis AVA_VLA.1
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
19
5.2 Security Requirements for the IT Environment
This section describes the security requirements that the IT environment must satisfy.
5.2.1 Security Functional Requirements for the IT Environment
FIA_SOS.2[E] TSF Generation of Secrets
Hierarchical to: No other components.
FIA_SOS.2.1[E]
The TSF shall provide a mechanism to generate secrets that meet [assignment: a defined quality metric].
Refinement: "TSF" --> Canon MFP/printer
[assignment: a defined quality metric]
‚ A unique 32 byte data value defined for each Canon MFP/printer
FIA_SOS.2.2[E]
The TSF shall be able to enforce the use of TSF generated secrets for [assignment: list of TSF functions].
Refinement: "TSF" --> Canon MFP/printer
[assignment: list of TSF functions]
‚ Device Identification and Authentication function
Dependencies: No dependencies.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
20
5.3 Strength of Security Functions
The minimum strength of function level for the TOE security functions is SOF-basic. The security functional
requirements to which the claimed strength of function rating applies are FIA_UAU.2, FIA_UAU.4 and
FIA_UID.2, and the strength of function level for these requirements is SOF-basic.
Of note, the cryptographic algorithm employed by the TOE is outside the scope of the strength of TOE
security functions.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
21
6. TOE Summary Specification
This chapter describes the TOE summary specification.
6.1 TOE Security Functions
This section explains the TOE security functions. As each function description is accompanied by an
indication of the corresponding security functional requirement(s), the security functions described below do
satisfy the TOE security functional requirements described in Section 5.1.1.
6.1.1 HDD Data Encryption Function (F.HDD_CRYPTO)
The HDD Data Encryption function consists of a set of the following security functions.
Security Function Specification SFR
The TOE performs the following cryptographic operations:
Encryption of data writes to the HDD
Decryption of data reads from the HDD
The cryptographic keys and the cryptographic algorithm used for these cryptographic
operations are as follows.
Cryptographic keys of “256 bits” length
The “AES algorithm” that meets FIPS PUB 197
FCS_COP.1
FPT_RVM.1
6.1.2 Cryptographic Key Management Function (F.KEY_MANAGE)
The Cryptographic Key Management function consists of a set of the following security functions.
Security Function Specification SFR
The TOE generates cryptographic keys for use by the HDD Data Encryption function
according to the following specifications:
The algorithm used for cryptographic key generation is a “FIPS 186-2-compliant
cryptographic key generation algorithm”.
The generated cryptographic key has a length of “256 bits”.
Cryptographic key management is conducted as follows:
Upon startup, the TOE reads the seed information stored in the Flash ROM and generates
a cryptographic key.
The TOE stores the generated cryptographic key in the work memory.
The Flash ROM where the seed information is stored cannot be accessed from outside the
TOE. Also, the cryptographic key is stored in volatile work memory and hence disappears
upon power-off of the Canon MFP/printer.
FCS_CKM.1
FPT_RVM.1
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
22
6.1.3 Device Identification and Authentication Function (F.KIT_CHECK)
The Device Identification and Authentication function consists of a set of the following security functions.
Security Function Specification SFR
Upon startup, the TOE confirms that it is connected to the “registered device” using the
authentication ID. To prevent reuse of authentication data related to the authentication
mechanism employed for registered device authentication, a standard challenge-and-
response authentication scheme is used: a pseudo-random number is generated as a
challenge every time the TOE is activated.
[Authentication ID registration]
At the time of installation of the HDD Data Encryption Kit, the TOE receives an
authentication ID from the Canon MFP/printer and saves it to the Flash ROM.
[Identification and authentication procedure]
Upon startup, the TOE generates a pseudo-random number and passes it to the Canon
MFP/printer as a challenge code. The Canon MFP/printer then calculates the response
based on the authentication ID and the challenge and passes it to the TOE. The TOE
performs the same calculation to verify the response.
If the TOE cannot confirm that it is connected to the “registered device”, the TOE prohibits
HDD access.
FIA_UAU.2
FIA_UAU.4
FIA_UID.2
FPT_RVM.1
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
23
6.2 Strength of Security Functions
In this TOE, the only IT security function that is realized by a probabilistic or permutation mechanism and
subject to a strength of function analysis is F.KIT_CHECK, and the strength of function for the IT security
function is SOF-basic.
6.3 Assurance Measures
This section explains the TOE security assurance measures. As shown in Table 6-1, these assurance
measures satisfy the TOE security assurance requirements described in Table 5-1.
Of note, the assurance measure for the ASE class requirements is this Security Target.
Table 6-1: TOE assurance measures
TOE Security Assurance Requirement Component Assurance Measure
Configuration
management
Authorization controls ACM_CAP.3 Canon MFP/Printer Security Chip
Configuration Management Plan 1
Canon MFP/Printer Security Chip
Configuration Management Plan 2
Canon MFP/Printer Security Chip Evaluation
Evidence List
TOE CM coverage ACM_SCP.1
Delivery and
operation
Delivery procedures ADO_DEL.1 Canon MFP/Printer Security Chip Delivery
Procedures 1
Canon MFP/Printer Security Chip Delivery
Procedures 2
Installation, generation,
and start-up procedures
ADO_IGS.1 HDD Data Encryption Kit-C Series Installation
Procedure (Japanese/English)
Development Informal functional
specification
ADV_FSP.1 Canon MFP/Printer Security Chip Firmware
Functional Specification
MBG1360A/B Hardware Specification
Security enforcing high-
level design
ADV_HLD.2 Canon MFP/Printer Security Chip Firmware
High-Level Design
MBG1360A/B Hardware Specification
Informal correspondence
demonstration
ADV_RCR.1 Canon MFP/Printer Security Chip
Representation Correspondence
Guidance
documents
Administrator guidance AGD_ADM.1 HDD Data Encryption Kit-C Series Reference
Guide (Japanese)
HDD Data Encryption Kit-C Series Reference
Guide (English)
HDD Mirroring Kit Reference Guide
(Japanese)
HDD Mirroring Kit Reference Guide (English)
Attached document “Caution” (Japanese)
Attached document “Caution” (English)
User guidance AGD_USR.1
Life cycle
support
Identification of security
measures
ALC_DVS.1 Canon MFP/Printer Security Chip Firmware
Development Security Rules
Tests Analysis of coverage ATE_COV.2 Canon MFP/Printer Security Chip Test
Coverage Analysis
Testing: high-level design ATE_DPT.1 Canon MFP/Printer Security Chip Analysis of
the Depth of Testing
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
24
Functional testing ATE_FUN.1 Canon MFP/Printer Security Chip Test
Specification
Canon MFP/Printer Security Chip Test
Procedures
Canon MFP/Printer Security Chip Test Results
Independent testing -
sample
ATE_IND.2 Canon MFP Security Chip 2.00
Vulnerability
assessment
Examination of guidance AVA_MSU.1 HDD Data Encryption Kit-C Series Installation
Procedure (Japanese/English)
HDD Data Encryption Kit-C Series Reference
Guide (Japanese)
HDD Data Encryption Kit-C Series Reference
Guide (English)
HDD Mirroring Kit Reference Guide
(Japanese)
HDD Mirroring Kit Reference Guide (English)
Attached document “Caution” (Japanese)
Attached document “Caution” (English)
Strength of TOE security
function evaluation
AVA_SOF.1 Canon MFP/Printer Security Chip Vulnerability
Analysis
Developer vulnerability
analysis
AVA_VLA.1
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
25
7. PP Claims
There are no PPs claimed to which this ST is conformant.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
26
8. Rationale
8.1 Security Objectives Rationale
Table 8-1 shows the mapping between the TOE security environment and the security objectives.
Table 8-1: Mapping between TOE security environment and security objectives
TOE security
environment
Security
objective
T.HDD_ACCESS
T.WRONG_BOARD
O.CRYPTO X
O.BOARD_AUTH X
OE.UNIQUE_INFO X
The following describes the rationale to justify the mapping shown in Table 8.1: Mapping between TOE
security environment and security objectives.
T.HDD_ACCESS
T.HDD_ACCESS is a threat that a malicious individual may attempt to disclose the data on the HDD by
removing and directly accessing the HDD using a disk analysis tool or another Canon MFP/printer.
To counter this threat, the data on the HDD must be protected from analysis by way of direct HDD access.
In this TOE, O.CRYPTO ensures that data writes and reads to/from the HDD are encrypted and decrypted
and hence it is impossible to analyze the data on the HDD by way of direct HDD access bypassing the TOE
using a disk analysis tool or another Canon MFP/printer.
As such, this threat can be countered by satisfying the security objective O.CRYPTO.
T.WRONG_BOARD
T.WRONG_BOARD is a threat that a malicious individual may attempt to disclose the data on the HDD by
moving the HDD Data Encryption Kit and the HDD from the “registered device” to another Canon
MFP/printer and accessing the HDD via the HDD Data Encryption Kit.
To counter this threat, the HDD must be protected from access via the TOE from any other Canon
MFP/printer than the “registered device”. Furthermore, if some Canon MFP/printer other than the "registered
device" were to produce an authentication ID identical to that of the "registered device", the malicious user
could connect the HDD Data Encryption Kit and the HDD to this other device , which would expose the HDD
data to the malicious user. For this reason, the Canon MFP/printer must generate an authentication ID that
is unique to each individual device.
In this TOE, O.BOARD_AUTH ensures that the TOE permits HDD access via itself only when and if it
confirms upon startup that it is connected to the “registered device” and hence HDD access via the TOE is
not allowed from any other Canon MFP/printer than the “registered device”. Additionally, OE.UNIQUE_INFO
ensures that the Canon MFP/printer generates an authentication ID that is unique to each individual device.
As such, this threat can be countered by satisfying the security objective O.BOARD_AUTH.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
27
8.2 Security Requirements Rationale
8.2.1 Rationale for Security Functional Requirements
Table 8-2 shows the mapping between the security objectives and the TOE security functional requirements.
Table 8-2: Mapping between security objectives and TOE security functional requirements
Security
objective
TOE security
requirement
O.CRYPTO
O.BOARD_AUTH
OE.UNIQUE_INFO
FCS_CKM.1 X
FCS_COP.1 X
FIA_UAU.2 X
FIA_UAU.4 X
FIA_UID.2 X
FPT_RVM.1 X X
FIA_SOS.2[E] X
The following describes the rationale to justify the mapping shown in Table 8.2: Mapping between security
objectives and TOE security functional requirements.
O.CRYPTO
This security objective requires that HDD writes and reads be encrypted and decrypted.
As for the cryptographic keys to be used for encryption and decryption, FCS_CKM.1 ensures that “256-bit
long cryptographic keys” that meet “FIPS 186-2” are generated in accordance with a “FIPS 186-2-based
cryptographic key generation algorithm”.
As for the actual encryption and decryption operations, FCS_COP.1 ensures that HDD writes are encrypted
and HDD reads are decrypted in accordance with the “AES encryption algorithm” as defined in “FIPS PUB
197” using “256-bit long cryptographic keys”.
Furthermore, FPT_RVM.1 ensures that the cryptographic key generation specified by FCS_CKM.1 and the
cryptographic operation specified by FCS_COP.1 are unfailingly enforced and succeed.
As such, O.CRYPTO can be achieved.
O.BOARD_AUTH
This security objective requires that the TOE permit HDD access via itself only when and if it confirms upon
startup that it is connected to the “registered device”.
FIA_UAU.2 and FIA_UID.2 ensure that the TOE performs identification and authentication of the registered
device and permits HDD access only if it determines that it is the “registered device”. The authentication
mechanism that is used for authentication of the registered device is the “authentication mechanism
employed for registered device authentication”, and FIA_UAU.4 ensures that reuse of authentication data is
prevented.
Furthermore, FPT_RVM.1 ensures that the identification and authentication specified by FIA_UAU.2 and
FIA_UID.2 and the prevention of authentication data reuse specified by FIA_UAU.4 are unfailingly enforced
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
28
and succeed.
As such, O.BOARD_AUTH can be achieved.
OE.UNIQUE_INFO
This security objective specifies that an authentication ID that is unique to each individual device shall be
generated by the Canon MFP/printer.
When the Data Encryption Kit is installed, FIA_SOS.2[E] ensures that an authentication ID is generated
which is a 32 byte data value unique to each individual Canon MFP/printer. This authentication ID is used by
the Device Identification and Authentication function.
Therefore, OE.UNIQUE_INFO is achieved.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
29
8.2.2 Dependencies of TOE Security Functional Requirements
Table 8-3 shows the dependencies of the TOE security functional requirements.
Table 8-3: TOE security functional requirements dependencies
# SFR Hierarchical to Dependencies Refer to Remarks
1 FCS_CKM.1 No other components [FCS_CKM.2
or
FCS_COP.1]
FCS_CKM.4
FMT_MSA.2
2 Since cryptographic keys are
stored in volatile work memory,
they are wiped out when there is
a loss of charge, due to the
Canon MFP/printer being
powered off. Therefore,
FCS_CKM.4 is not required.
There are no security-related
attributes in this TOE, e.g., key
type and expiration period.
Therefore, FMT_MSA.2 is not
applicable.
2 FCS_COP.1 No other components [FDP_ITC.1
or
FCS_CKM.1]
FCS_CKM.4
FMT_MSA.2
1 Since cryptographic keys are
stored in volatile work memory,
they are wiped out when there is
a loss of charge, due to the
Canon MFP/printer being
powered off. Therefore,
FCS_CKM.4 is not required.
There are no security-related
attributes in this TOE, e.g., key
type and expiration period.
Therefore, FMT_MSA.2 is not
applicable.
3 FIA_UAU.2 FIA_UAU.1 FIA_UID.1 5 FIA_UID.2 is hierarchical to
FIA_UID.1.
4 FIA_UAU.4 No other components No dependencies
5 FIA_UID.2 FIA_UID.1 No dependencies
6 FPT_RVM.1 No other components No dependencies
7 FIA_SOS.2[E] No other components No dependencies
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
30
8.2.3 Interactions between TOE Security Functional Requirements
Table 8-4 shows the security functional requirements that are not required to be in an explicit dependent
relationship but have been selected for mutual support purposes.
Table 8-4: Interactions between TOE security functional requirements
No SFR Mutual Support
1 FCS_CKM.1 FPT_RVM.1
2 FCS_COP.1 FPT_RVM.1
3 FIA_UAU.2 FPT_RVM.1
4 FIA_UAU.4 FPT_RVM.1
5 FIA_UID.2 FPT_RVM.1
6 FPT_RVM.1 None
FPT_RVM.1 <Non-bypassibility>
FPT_RMV.1 ensures that the security functional requirements for cryptographic key generation,
cryptographic operation and challenge-and-response authentication are all invoked and succeed before
each function within the TSC is allowed to proceed. The security functional requirements to be covered are
FCS_CKM.1, FCS_COP.1, FIA_UAU.2, FIA_UAU.4 and FIA_UID.2.
As such, since FPT_RVM.1 supports the non-bypassibility of FCS_CKM.1, FCS_COP.1, FIA_UAU.2,
FIA_UAU.4 and FIA_UID.2, the security objectives O.CRYPTO and O.BOARD_AUTH are achieved.
<Domain separation>
In this TOE, there is no subject that accesses an object on behalf of a user and hence no access control or
information flow control is enforced. Therefore, the functional requirement FPT_SEP.1 that protects the TSF
from interference and tampering by untrusted subjects is not required.
<Disabling>
This TOE has no functions related to security management, including the starting and stopping of security
functions, hence, it requires no functional requirement that protects the TSF from disabling of security
functions.
8.2.4 Rationale for Minimum Strength of Function Level
Since the attack potential of an attacker anticipated in the operational environment for the TOE is defined to
be low, the method of attack would be to use some public interface, public information and disk analysis
tools (commercially available ones). Low-level attacks can be countered by such TOE enforcing security
measures as encryption and “registered device” confirmation, therefore, it can be said that the TOE security
objectives are resistant to low-level attacks. As such, since being resistant to low-level attacks, the TOE
security objectives are consistent with the minimum strength of function of SOF-basic.
Also, specific functional requirements (FIA_UAU.2, FIA_UAU.4 and FIA_UID.2) have a strength of function
of SOF-basic and are consistent with the minimum strength of function of SOF-basic.
8.2.5 Rationale for Security Assurance Requirements
This TOE is a commercially available IT product that provides security features to Canon MFPs/printers,
aimed at countering the threat of data leakage through HDD theft by low-level attackers. For that reason, the
TOE is required to ensure resistance against low-level attacks by unspecified persons. Accordingly, in
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
31
addition to the security assurance efforts that are made during the development process, e.g., identification
of external interfaces, specification of function internal structures, confirmation of security functions through
tests, and vulnerability assessment, additional security assurance efforts also need to be made from other
aspects, e.g., development environment and prevention of misuse. Therefore, EAL3 is an appropriate
evaluation assurance level for the TOE.
The entire set of security assurance requirements required in EAL3 is employed, and therefore, all of the
dependencies between the TOE security assurance requirements are satisfied.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
32
8.3 TOE Summary Specification Rationale
8.3.1 Appropriateness of Security Functional Requirements for TOE Summary
Specification
Table 8-5 shows the appropriateness of the mapping between the security functional requirements and the
TOE summary specification.
Table 8-5: Mapping between TOE summary specification and security functional requirements
TOE summary
specification
Security
functional
requirement
F.HDD_CRYPTO
F.KEY_MANAGE
F.KIT_CHECK
FCS_CKM.1 X
FCS_COP.1 X
FIA_UAU.2 X
FIA_UAU.4 X
FIA_UID.2 X
FPT_RVM.1 X X X
The following describes the rationale to justify the mapping shown in Table 8.5: Mapping between TOE
summary specification and security functional requirements.
FCS_CKM.1
FCS_CKM.1 is a functional requirement that “256-bit long cryptographic keys” that meet “FIPS 186-2” be
generated in accordance with a “FIPS 186-2-based cryptographic key generation algorithm”.
F.KEY_MANAGE generates 256-bit long cryptographic keys using a FIP 186-2-compliant cryptographic key
generation algorithm. Therefore, FCS_CKM.1 is achieved.
FCS_COP.1
FCS_COP.1 is a functional requirement that encryption of HDD writes and decryption of HDD reads be
performed in accordance with the “AES encryption algorithm” that is compliant with “FIPS PUB 197” using
“256-bit long cryptographic keys”.
F.HDD_CRYPTO performs encryption of HDD writes and decryption of HDD reads in accordance with the
AES encryption algorithm as defined in FIPS PUB 197 using 256-bit long cryptographic keys. Therefore,
FCS_COP.1 is achieved.
FIA_UAU.2
FIA_UAU.2 is a functional requirement that the TSF require the registered device to be successfully
authenticated before use.
F.KIT_CHECK confirms upon startup of the TOE that the TOE is connected to the “registered device” using a
challenge-and-response authentication scheme. Therefore, FIA_UAU.2 is achieved.
FIA_UAU.4
FIA_UAU.4 is a functional requirement that the TSF prevent reuse of authentication data related to the
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
33
“authentication mechanism employed for registered device authentication”.
F.KIT_CHECK allows the “authentication mechanism employed for registered device authentication” to be
instantiated and achieved as a challenge-and-response authentication process, and the “prevention of reuse
of authentication data” to be achieved by generating a pseudo-random number as a challenge upon each
startup of the TOE. Therefore, FIA_UAU.4 is achieved.
FIA_UID.2
FIA_UID.2 is a functional requirement that the TSF require the registered device to be successfully identified
before use.
F.KIT_CHECK identifies the registered device by performing a challenge-and-response authentication using
the authentication ID that was received from the Canon MFP/printer at the time of installation of the HDD
Data Encryption Kit. Therefore, FIA_UID.2 is achieved.
FPT_RVM.1
FPT_RVM.1 is a functional requirement that the TSP enforcement functions be invoked without being
bypassed.
F.HDD_CRYPTO unifies the paths for HDD writes and reads and hence encrypts/decrypts every data via the
TOE, an encryption chip. Therefore, the non-bypassibility of the TSP is ensured in F.HDD_CRYPTO.
F.KEY_MANAGE generates a cryptographic key for use by F.HDD_CRYPTO when the power button, which
is a physical switch, is pressed. Since there is no other interface to F.KEY_MANAGE than the power button
and its method of use is simply to turn it on or off, F.KEY_MANAGE cannot be bypassed at the time of
power-on of the Canon MFP/printer. Therefore, the non-bypassibility of the TSP is ensured in
F.KEY_MANAGE.
F.KIT_CHECK enforces a challenge-and-response authentication when the power button, which is a
physical switch, is pressed. Since there is no other interface to F.KIT_CHECK than the power button and its
method of use is simply to turn it on or off, F.KIT_CHECK cannot be bypassed at the time of power-on of the
Canon MFP/printer. Therefore, the non-bypassibility of the TSP is ensured in F.KIT_CHECK.
8.3.2 Rationale for Strength of Function Level for Security Functions
The strength of function level for the specific TOE security functional requirements, FIA_UAU.2, FIA_UAU.4
and FIA_UID.2, is SOF-basic.
Also, the strength of function level for the IT security function, F.KIT_CHECK, is SOF-basic.
Therefore, the strength of function level for the specific TOE security functional requirements is consistent
with that for the IT security function.
8.3.3 Rationale for Assurance Measures
As shown in Table 6-1, all the TOE security assurance requirements are met by the set of documents that
are provided as assurance measures.
The following describes the rationale for why the EAL3 assurance requirements are satisfied by the
assurance measures.
ACM_CAP.3 Authorization controls
[Assurance Measures]
y Canon MFP/Printer Security Chip Configuration Management Plan 1
y Canon MFP/Printer Security Chip Configuration Management Plan 2
y Canon MFP/Printer Security Chip Evaluation Evidence List
[Assurance Requirement Rationale]
The assurance measures, “Canon MFP/Printer Security Chip Configuration Management Plan 1”, “Canon
MFP/Printer Security Chip Configuration Management Plan 2” and “Canon MFP/Printer Security Chip
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
34
Evaluation Evidence List”, specify the naming convention, a list of configuration items and the method for
uniquely identifying all configuration items, for TOE version identification purposes. Therefore, the
ACM_CAP.3 assurance requirement is satisfied.
ACM_SCP.1 TOE CM coverage
[Assurance Measures]
y Canon MFP/Printer Security Chip Configuration Management Plan 1
y Canon MFP/Printer Security Chip Configuration Management Plan 2
y Canon MFP/Printer Security Chip Evaluation Evidence List
[Assurance Requirement Rationale]
The assurance measures, “Canon MFP/Printer Security Chip Configuration Management Plan 1”, “Canon
MFP/Printer Security Chip Configuration Management Plan 2” and “Canon MFP/Printer Security Chip
Evaluation Evidence List”, specify the coverage of management of TOE configuration items. Therefore, the
ACM_SCP.1 assurance requirement is satisfied.
ADO_DEL.1 Delivery procedures
[Assurance Measures]
y Canon MFP/Printer Security Chip Delivery Procedures 1
y Canon MFP/Printer Security Chip Delivery Procedures 2
[Assurance Requirement Rationale]
The assurance measures, “Canon MFP/Printer Security Chip Delivery Procedures 1” and “Canon
MFP/Printer Security Chip Delivery Procedures 2”, specify the procedures for keeping the integrity of the
TOE when distributing the TOE to a user’s site. Therefore, the ADO_DEL.1 assurance requirement is
satisfied.
ADO_IGS.1 Installation, generation and start-up procedures
[Assurance Measures]
y HDD Data Encryption Kit-C Series Installation Procedure (Japanese)/HDD Data Encryption Kit-C Series
Installation Procedure (English)
[Assurance Requirement Rationale]
The assurance measure, “HDD Data Encryption Kit-C Series Installation Procedure” (Japanese/English),
specifies the installation procedures and the startup check method that are used for secure configuration of
the TOE. Therefore, the ADO_IGS.1 assurance requirement is satisfied.
ADV_FSP.1 Informal functional specification
[Assurance Measures]
y Canon MFP/Printer Security Chip Firmware Functional Specification
y MBG1360A/B Hardware Specification
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Firmware Functional Specification”, specifies
the specifications of all external interfaces to the TOE security functions. Therefore, the ADV_FSP.1
assurance requirement is satisfied.
ADV_HLD.2 Security enforcing high-level design
[Assurance Measures]
y Canon MFP/Printer Security Chip Firmware High-Level Design
y MBG1360A/B Hardware Specification
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Firmware High-Level Design”, divides the TSF
into subsystems and specifies the specifications of the subsystems and the inter-subsystem interfaces. Also,
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
35
“HERMIT Hardware Manual” describes the hardware information necessary for firmware development.
Therefore, the ADV_HLD.2 assurance requirement is satisfied.
ADV_RCR.1 Informal correspondence demonstration
[Assurance Measures]
y Canon MFP/Printer Security Chip Representation Correspondence
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Representation Correspondence”, describes
the complete correspondence of the TOE security functions at all levels (summary specification – functional
specification – high-level design). Therefore, the ADV_RCR.1 assurance requirement is satisfied.
AGD_ADM.1 Administrator guidance
[Assurance Measures]
y HDD Data Encryption Kit-C Series Reference Guide (Japanese)
y HDD Data Encryption Kit-C Series Reference Guide (English)
y HDD Mirroring Kit Reference Guide (Japanese)
y HDD Mirroring Kit Reference Guide (English)
y Attached document “Caution”(Japanese)
y Attached document “Caution”(English)
[Assurance Requirement Rationale]
The assurance measures, “HDD Data Encryption Kit-C Series Reference Guide” (Japanese) , “HDD Data
Encryption Kit-C Series Reference Guide” (English) , “HDD Mirroring Kit Reference Guide” (Japanese) ,
“HDD Mirroring Kit Reference Guide” (English) , “Attached document “Caution””(Japanese) and “Attached
document “Caution””(English), specify the interfaces available to TOE users, the method of use, including
warnings, to operate the TOE in a secure manner, and the actions to be taken by users in the event of
TOE failure. Therefore, the AGD_ADM.1 assurance requirement is satisfied.
AGD_USR.1 User guidance
[Assurance Measures]
y HDD Data Encryption Kit-C Series Reference Guide (Japanese)
y HDD Data Encryption Kit-C Series Reference Guide (English)
y HDD Mirroring Kit Reference Guide (Japanese)
y HDD Mirroring Kit Reference Guide (English)
y Attached document “Caution”(Japanese)
y Attached document “Caution”(English)
[Assurance Requirement Rationale]
The assurance measures, “HDD Data Encryption Kit-C Series Reference Guide” (Japanese) , ”HDD Data
Encryption Kit-C Series Reference Guide” (English), “HDD Mirroring Kit Reference Guide” (Japanese) ,
“HDD Mirroring Kit Reference Guide” (English) , “Attached document “Caution””(Japanese) and “Attached
document “Caution””(English), specify the interfaces available to TOE users and the method of use,
including warnings, to operate the TOE in a secure manner. Therefore, the AGD_USR.1 assurance
requirement is satisfied.
ALC_DVS.1 Identification of security measures
[Assurance Measures]
y Canon MFP/Printer Security Chip Firmware Development Security Rules
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Firmware Development Security Rules”,
specifies all the physical, procedural, personnel and other security measures that are used to protect the
TOE in its development environment. Therefore, the ALC_DVS.1 assurance requirement is satisfied.
Copyright (C) 2007-2008, Canon Inc. All rights reserved.
36
ATE_COV.2 Analysis of coverage
[Assurance Measures]
y Canon MFP/Printer Security Chip Test Coverage Analysis
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Test Coverage Analysis”, describes the
sufficiency and completeness of the tests on the TOE security functions and external interfaces. Therefore,
the ATE_COV.2 assurance requirement is satisfied.
ATE_DPT.1 Testing: high-level design
[Assurance Measures]
y Canon MFP/Printer Security Chip Analysis of the Depth of Testing
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Analysis of the Depth of Testing”, describes the
sufficiency and completeness of the tests on the TOE subsystems and inter-subsystem interfaces. Therefore,
the ATE_DPT.1 assurance requirement is satisfied.
ATE_FUN.1 Functional testing
[Assurance Measures]
y Canon MFP/Printer Security Chip Test Specification
y Canon MFP/Printer Security Chip Test Procedures
y Canon MFP/Printer Security Chip Test Results
[Assurance Requirement Rationale]
The assurance measures, “Canon MFP/Printer Security Chip Test Specification”, “Canon MFP/Printer
Security Chip Test Procedures” and “Canon MFP/Printer Security Chip Test Results”, describe the test plans
for the TSF, test procedures and test results. Therefore, the ATE_FUN.1 assurance requirement is satisfied.
ATE_IND.2 Independent testing – sample
[Assurance Measures]
y Canon MFP Security Chip 1.50
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP Security Chip 1.50”, reproduces the TOE security function test
environment and provides test resources. Therefore, the ATE_IND.2 assurance requirement is satisfied.
AVA_MSU.1 Examination of guidance
[Assurance Measures]
y HDD Data Encryption Kit-C Series Installation Procedure (Japanese/English)
y HDD Data Encryption Kit-C Series Reference Guide (Japanese)
y HDD Data Encryption Kit-C Series Reference Guide (English)
y HDD Mirroring Kit Reference Guide (Japanese)
y HDD Mirroring Kit Reference Guide (English)
y Attached document “Caution”(Japanese)
y Attached document “Caution”(English)
[Assurance Requirement Rationale]
The assurance measures, “HDD Data Encryption Kit-C Series Installation Procedure” (Japanese/English),
“HDD Data Encryption Kit-C Series Reference Guide” (Japanese) , “HDD Data Encryption Kit-C Series
Reference Guide” (English), “HDD Mirroring Kit Reference Guide” (Japanese) , “HDD Mirroring Kit
Reference Guide” (English) , “Attached document “Caution””(Japanese) and “Attached document
“Caution””(English), describe the method of use of the TOE to help TOE users not place the TOE in a non-
secure state due to misuse. Therefore, the AVA_MSU.1 assurance requirement is satisfied.
AVA_SOF.1 Strength of TOE security function evaluation
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[Assurance Measures]
y Canon MFP/Printer Security Chip Vulnerability Analysis
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Vulnerability Analysis”, describes a strength of
TOE security function analysis for the security mechanisms of the TOE security functions. Therefore, the
AVA_SOF.1assurance requirement is satisfied.
AVA_VLA.1 Developer vulnerability analysis
[Assurance Measures]
y Canon MFP/Printer Security Chip Vulnerability Analysis
[Assurance Requirement Rationale]
The assurance measure, “Canon MFP/Printer Security Chip Vulnerability Analysis”, describes that security
vulnerabilities cannot be exploited in the intended environment for the TOE. Therefore, the AVA_VLA.1
assurance requirement is satisfied.
8.4 PP Claim Rationale
There is no PP referenced by this ST.
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38
(End of Document)