January 2021
Fuji Xerox
ApeosPort-VII
C4422/C4421/C3322/C3321
models with Copy, Print, Fax, Scan and
Overwrite Storage
Security Target
Version 1.09
This document is a translation of the evaluated
and certified security target written in Japanese.
- i -
- Table of Contents -
1. ST INTRODUCTION................................................................................................................1
1.1. ST Reference .....................................................................................................................................................1
1.2. TOE Reference..................................................................................................................................................1
1.3. TOE Overview....................................................................................................................................................2
TOE Type.....................................................................................................................................................................2
Usage and Major Security Features of TOE ..................................................................................................2
Required Non-TOE Hardware and Software..................................................................................................3
1.4. TOE Description...............................................................................................................................................5
Users Assumptions..................................................................................................................................................5
Logical Boundary of the TOE..............................................................................................................................6
Physical Boundary of the TOE ............................................................................................................................8
2. CONFORMANCE CLAIM .....................................................................................................11
2.1. CC Conformance Claim.............................................................................................................................11
2.2. PP claim, Package Claim...........................................................................................................................11
PP Claim...................................................................................................................................................................11
Package Claim.......................................................................................................................................................11
Conformance Rationale.....................................................................................................................................11
3. SECURITY PROBLEM DEFINITION ................................................................................12
3.1. Threats .............................................................................................................................................................12
Assets Protected by TOE....................................................................................................................................12
Threats.....................................................................................................................................................................12
3.2. Organizational Security Policies............................................................................................................13
3.3. Assumptions...................................................................................................................................................14
4. Security Objectives................................................................................................................15
5. EXTENDED COMPONENTS DEFINITION....................................................................16
5.1. Extended Functional Requirements Definition...............................................................................16
Class FAU: Security Audit ..................................................................................................................................16
Class FCS: Cryptographic Support..................................................................................................................17
Class FDP: User Data Protection.....................................................................................................................22
Class FIA: Identification and Authentication............................................................................................24
Class FPT: Protection of the TSF.....................................................................................................................25
6. SECURITY REQUIREMENTS..............................................................................................29
6.1. Notation ..........................................................................................................................................................29
6.2. Security Functional Requirements........................................................................................................29
Class FAU: Security Audit ..................................................................................................................................29
Class FCS: Cryptographic Support..................................................................................................................32
- ii -
Class FDP: User Data Protection.....................................................................................................................40
Class FIA: Identification and Authentication............................................................................................44
Class FMT: Security Management.................................................................................................................46
Class FPT: Protection of the TSF.....................................................................................................................50
Class FTA: TOE Access.........................................................................................................................................51
Class FTP: Trusted Paths/Channels................................................................................................................52
6.3. Security Assurance Requirements........................................................................................................54
6.4. Security Requirement Rationale ...........................................................................................................55
Dependencies of Security Functional Requirements ..............................................................................55
Security Assurance Requirements Rationale..............................................................................................59
7. TOE Summary Specification .............................................................................................60
7.1. Security Functions.......................................................................................................................................60
Identification and Authentication.................................................................................................................62
Security Audit........................................................................................................................................................64
Access Control .......................................................................................................................................................68
Security management........................................................................................................................................70
Trusted Operation................................................................................................................................................72
Data Encryption....................................................................................................................................................73
Trusted Communications..................................................................................................................................79
PSTN Fax-Network Separation........................................................................................................................82
Overwrite Storage ................................................................................................................................................82
8. ACRONYMS AND TERMINOLOGY ..................................................................................83
8.1. Acronyms.........................................................................................................................................................83
8.2. Terminology ...................................................................................................................................................83
9. REFERENCES ...........................................................................................................................88
- iii -
- List of Figures and Tables -
Figure 1 Operational Environment Assumed by TOE.........................................................................................2
Figure 2 TOE Logical Boundary...................................................................................................................................6
Table 1 User Roles .............................................................................................................................................................5
Table 2 Physical Components Constituting the TOE (MFD Main Unit).....................................................9
Table 3 Physical Components Constituting the TOE (Japanese version guidance)..............................9
Table 4 Physical Components Constituting the TOE (English version guidance) ...............................10
Table 5 Assets for User Data......................................................................................................................................12
Table 6 Assets for TSF Data .......................................................................................................................................12
Table 7 Threats................................................................................................................................................................12
Table 8 Organizational Security Policies...............................................................................................................13
Table 9 Assumptions.....................................................................................................................................................14
Table 10 Security Objectives for the TOE Environment .................................................................................15
Table 11 Auditable Events ..........................................................................................................................................30
Table 12 D.USER.DOC Access Control SFP...........................................................................................................41
Table 13 D.USER.JOB Access Control SFP............................................................................................................42
Table 14 List of Security Functions .........................................................................................................................47
Table 15 Security Attributes and Authorized Roles.........................................................................................47
Table 16 Management of TSF Data.......................................................................................................................48
Table 17 Security Management Functions..........................................................................................................49
Table 18 Security Assurance Requirements........................................................................................................54
Table 19 Dependencies of Functional Security Requirements ...................................................................55
Table 20 Security Functional Requirements and the Corresponding TOE Security Functions......60
Table 21 Details of Security Audit Log..................................................................................................................65
Table 22 Security management functions and their operationable UIs...............................................70
Table 23 Methods to destroy keys and key material stored in plaintext...............................................74
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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1. ST INTRODUCTION
This chapter describes Security Target (ST) Reference, TOE Reference, TOE Overview, and TOE
Description.
1.1. ST Reference
This section provides information needed to identify this ST.
ST Title:
Fuji Xerox ApeosPort-VII C4422/C4421/C3322/C3321 models
with Copy, Print, Fax, Scan and Overwrite Storage
Security Target
ST Version: V 1.09
Publication Date: January 20, 2021
Author: Fuji Xerox Co., Ltd.
1.2. TOE Reference
This section provides information needed to identify the TOE.
TOE Identification:
Fuji Xerox ApeosPort-VII C4422/C4421/C3322/C3321 models
with Copy, Print, Fax, Scan and Overwrite Storage
Version: Controller ROM Ver. 1.5.3
The TOE is one of the following products.
Japanese market
Product Version
ApeosPort-VII C4422 models with Copy, Print, Fax, Scan and
Overwrite Storage
Controller ROM Ver. 1.5.3
ApeosPort-VII C4421 models with Copy, Print, Fax, Scan and
Overwrite Storage
ApeosPort-VII C3322 models with Copy, Print, Fax, Scan and
Overwrite Storage
Other markets
Product Version
ApeosPort-VII C4421 models with Copy, Print, Fax, Scan and
Overwrite Storage
Controller ROM Ver. 1.5.3
ApeosPort-VII C3321 models with Copy, Print, Fax, Scan and
Overwrite Storage
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1.3. TOE Overview
TOE Type
The TOE is an MFD that is connected to a wired Local Area Network (LAN) and supports the copy,
scan, print, fax, and document storage and retrieval functions.
Usage and Major Security Features of TOE
Figure 1 Operational Environment Assumed by TOE
The MFD is used in an environment that is connected to a wired Local Area Network (LAN) isolated
from the external network by the firewall.
The MFD can connect to the public telephone line to send and receive fax data.
External
Network
Firewall
General
User
General User Client
-Printer Driver
-Web Browser
TOE
System
Administrator
LAN
System Administrator
Client
-Web Browser
Mail Server
System
Administrator
General User
Audit Server
Public
Telephone Line
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Users use each basic function of the MFD from the control panel of the MFD or web browser or
printer driver of the general user and system administrator clients.
The MFD has the functions to copy, scan, print, fax (send and receive), store and retrieve the
documents handled by users.
To prevent alteration and leakage of these documents, the MFD has the functions to identify and
authenticate users, control access to documents and functions based on user roles, encrypt the
setting data and document data stored in MFD storage, protect the communication data on the
LAN, manage security settings (available only to system administrators), store the usage history of
the security functions of the MFD in the MFD internally and monitor the usage history from an
external audit server at the same time (security audit function), verify the integrity of the TSF
executable code and TSF data, verify the authenticity of the TSF executable code when the code is
updated, and separate the fax line and the LAN, and overwrite residual image data stored in the
storage.
To use overwrite residual image data function, it is necessary to purchase the data overwrite kit
and enable the overwrite storage function.
The products that are included in the TOE support local authentication and remote authentication,
when the remote authentication option is installed. However, only local authentication is used in
the settings of the TOE.
Note：
There are two types of Mailboxes: The Personal Mailbox, which SAs and general users
can create, and the Shared Mailbox, which the Key Operator can create. The guidance
of the TOE prohibits the use of the Shared Mailbox. In this ST, "Mailbox" means
"Personal Mailbox."
The interfaces for users to connect personal storage devices (portable flash memory
devices, etc.) to the MFD are disabled.
Required Non-TOE Hardware and Software
In the operational environment shown in Figure 1, the TOE is an MFD, and there are the following
non-TOE hardware and software.
(1) General user client
The hardware is a general-purpose computer.
When the computer is used as a printer client, the user needs to install a printer driver on the
computer so that a request to print document data can be sent to the MFD.
In order to use the web server function of the MFD, the user needs to use a web browser installed
on the computer.
(2) System administrator client
The hardware is a general-purpose computer.
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A web browser is necessary for a system administrator to refer to and change the TOE settings
and update the TOE firmware.
(3) Mail server
A mail server is necessary for the MFD to send scanned documents via email. The hardware/OS
of the server is a general-purpose computer/server, and an email service that supports the SMTP
protocol protected by TLS needs to be installed.
(4) Audit server
An audit server is necessary to collect audit events occurred on the MFD. The hardware/OS is a
general-purpose computer/server, and the MFD sends security audit logs to the audit server using
HTTPS on the request of the audit server.
In the TOE evaluation, the following shall be used as the hardware and software listed above.
The OS and web browser for (1) general user client and (2) system administrator client shall be
Windows 10 and Microsoft Edge respectively.
(3) mail server shall be Postfix version 2.10.1.
The OS of (4) audit server shall be Windows 10, and the execution environment to retrieve logs
shall be PowerShell version 5.1. The system administrator needs to create a PowerShell script for
log retrieval in accordance with the guidance and install it on the server.
The printer driver used in (1) general user client shall be either of the following printer drivers,
which Fuji Xerox offers for the target MFD models.
For the Japanese market: ART EX Driver (Microsoft®
WHQL Certified Driver)
For other markets: 64-bit Windows Print Driver (PCL)
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1.4. TOE Description
This section describes user roles and the logical and physical boundaries of the TOE.
Users Assumptions
Table 1 specifies the TOE user roles assumed in this ST.
Table 1 User Roles
Name User data type Definition
U.NORMAL General user An identified and authorized
User who is not granted the
administrative role.
U.ADMIN System administrator An identified and authorized
User who is granted the
administrative role.
(In the TOE, the Key Operator
and SAs are U.ADMIN. They
are collectively referred to as
U.ADMIN in this ST.)
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Logical Boundary of the TOE
Figure 2 shows the logical architecture of the TOE.
Among the functions within the logical boundary, the ones without underlines are basic functions
and the ones with underlines are security functions.
Figure 2 TOE Logical Boundary
Basic Functions
(1) Print: The MFD receives a digital document sent from the printer driver of the general user
client. The received document is converted into a hard copy in accordance with the request
from the control panel.
(2) Scan: The MFD scans the document on the scanner in accordance with the request from
the control panel and converts the document into a digital document. The TOE has the
function to send digital documents converted from paper documents by the scan function
TOE
General user
System
administrator
System
administrator
client
・Web browser
General user
client
・Printer driver
・Web browser
Identification and
authentication
Trusted
communications
Access control
Security
management
Logical boundary
Print
Copy
Scan
Mail server
Audit server
Data encryption
Document storage
and retrieval
Security audit
Trusted operation
Storage
Documen
t data
Audit
log
data
Used
docume
nt data
TOE
setting
data
Public
telephone line
Fax
PSTN fax-network
separation
Overwrite Storage
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to the mail server and the function to store these documents in Mailboxes using the
document storage and retrieval function.
(3) Copy: The MFD copies the document on the scanner in accordance with the request from
the control panel.
(4) PSTN fax send: The MFD scans the document on the scanner in accordance with the
request from the control panel and sends the document data to the PSTN fax destination
through PSTN using the standard PSTN fax protocol.
(5) PSTN fax receive: The MFD receives fax document data sent from the machine on the
other end of line through PSTN and stores the data in a specific Mailbox using the
document storage and retrieval function.
(6) Document storage and retrieval: The MFD stores digital documents in Mailboxes and
enables the following functions for stored documents in response to requests sent from the
control panel or general user clients. In the TOE, digital documents that can be stored in a
Mailbox are scanned documents with the scan function, or fax documents received with
the PSTN fax receive.
Print: Print a digital document stored in Mailbox in accordance with the request from the
control panel.
Retrieve: Send documents to general user clients in response to requests sent from general
user clients.
Delete: Delete stored digital documents in accordance with the request from the control
panel or general user clients.
Security Functions
The TOE provides the following security functions to support the basic functions described in
1.4.2.1.
(1) Identification and Authentication
Identifying/authenticating users and granting roles to the users ensure that functions of
the MFD are accessible only to users who have been granted roles by a system
administrator. The user identification and authentication function are also used as the
basis for access control and administrative roles and helps associate specific users with
security-relevant events and records of MFD use. The MFD carries out the identification
and authentication of users.
When a user attempts to be authenticated and fails consecutively multiple times, another
request to authenticate the user is no longer accepted.
When the remote authentication option is additionally installed, the products that are
included in the TOE support local authentication and remote authentication. However,
only local authentication is selected in the TOE settings.
(2) Access Control
Access control ensures that documents, information related to document processing, and
security-relevant data are accessible only to users who have appropriate access
permissions.
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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(3) Data Encryption
Data encryption ensures that the data and communications data stored in the TOE
cannot be accessed by an attacker through an unauthorized interface.
Depending on the policy, data encryption is also used to protect documents and
confidential system information on field-replaceable nonvolatile storage devices and to
protect such data when these devices are removed from the MFD.
The effectiveness of data encryption is assured through the use of internationally
accepted cryptographic algorithms.
(4) Trusted Communications
Trusted communications protect communication data on an internal network, such as
document data, job information, security audit log data, and TOE setting data.
The TOE supports general encrypted communication protocols (TLS/HTTPS and TLS).
(5) Security Management
The security management function ensures that only users who have been identified and
authenticated as system administrators can refer to or change the settings of security
functions of the TOE from the control panel or system administrator client.
(6) Security Audit
Information about when and who carried out which actions and important events, such
as device failure, configuration change, and user operation, are transferred to the audit
server and stored as security audit log data. The security audit log data is encrypted by
the HTTPS protocol when being transferred.
The history of audit log data is stored in the TOE internally, only authorized users as a
system administrator can also download it from a web browser of a system administrator
client.
(7) Trusted Operation
Firmware updates for the MFD are verified before being applied to ensure the
authenticity of the software. The MFD performs self-tests to ensure that its operation is
not disrupted by some detectable malfunctions.
(8) PSTN Fax-Network Separation
With regard to PSTN fax-network separation, the MFD ensures that the PSTN fax modem
is not used to create a data bridge between the PSTN and the LAN.
(9) Overwrite Storage
Used document data stored in the internal storage is overwritten after any of functions,
such as copy, print, and scan, is completed.
Physical Boundary of the TOE
The physical boundary of the TOE is the whole MFD. The TOE does not include options and add-
ons that are not relevant to security, such as finishers. Physical components that constitute the
TOE are listed in Tables 2 to 4.
MFD unit is identified by the model name and function buttons displayed in the control panel after
start-up.
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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Table 2 Physical Components Constituting the TOE (MFD Main Unit)
Market Unit Version Format Delivery method
Other ApeosPort-VII C3321
models with Copy,
Print, Fax, Scan and
Overwrite Storage
Controller ROM Ver.
1.5.3
Hardware on which
firmware in binary
format is installed
On-site
Japan ApeosPort-VII C3322
models with Copy,
Print, Fax, Scan and
Overwrite Storage
Controller ROM Ver.
1.5.3
Hardware on which
firmware in binary
format is installed
On-site
Japan/
Other
ApeosPort-VII C4421
models with Copy,
Print, Fax, Scan and
without Overwrite
Storage
Controller ROM Ver.
1.5.3
Hardware on which
firmware in binary
format is installed
On-site
Japan ApeosPort-VII C4422
models with Copy,
Print, Fax, Scan and
without Overwrite
Storage
Controller ROM Ver.
1.5.3
Hardware on which
firmware in binary
format is installed
On-site
As shown in Table 3 and Table 4, the guidance of this TOE is available in Japanese and English. The
Japansese version for the Japanese market and the English version for other markets are
distributed to users.
Table 3 Physical Components Constituting the TOE (Japanese version guidance)
Form number Format Delivery method Guidance name Hash value
ME8900J1-1 PDF file On-site ApeosPort-VII C4421
User Guide
-
ME8899J1-1 HTML
file
On-site ApeosPort-VII C4422/
C3322
User Guide
-
ME8784J1-
1_20210112
PDF file Web ApeosPort-VII C4422
ApeosPort-VII C4421
ApeosPort-VII C3322
Security Function
Supplementary Guide
95ae3c019b9ee732
832ac3e90904696c
129935e2b149beed
6e2edb793eac34fe
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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Table 4 Physical Components Constituting the TOE (English version guidance)
Form number Format Delivery method Guidance name Hash value
ME8782E2-1 PDF file On-site ApeosPort-VII C4421
ApeosPort-VII C3321
User Guide
-
ME8785E2-
1_20210112
PDF file Web ApeosPort-VII C4421
ApeosPort-VII C3321
Security Function
Supplementary Guide
24af4ec24ad2baa42
9e8683a3a0685c08
12693448f86478a8
06e4fc202cd09d6
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2. CONFORMANCE CLAIM
2.1. CC Conformance Claim
This ST and TOE claim conformance to the following versions of CC:
Common Criteria for Information Technology Security Evaluation
Part 1: Introduction and general model (April 2017 Version 3.1 Revision 5)
Part 2: Security functional components (April 2017 Version 3.1 Revision 5)
Part 3: Security assurance components (April 2017 Version 3.1 Revision 5)
CC Part2 extended
CC Part3 conformant
2.2. PP claim, Package Claim
PP Claim
This ST claims exact conformance to the following HCD-PP.
Title: Protection Profile for Hardcopy Devices
Version: 1.0 dated September 10, 2015
Errata: Protection Profile for Hardcopy Devices – v1.0 Errata #1, June 2017
Package Claim
This Security Target and TOE do not claim package conformance.
Conformance Rationale
This ST and TOE satisfy the conditions required by the PP.
The TOE type conforms to the PP because this ST and TOE satisfy the following conditions required
by the PP and claim exact conformance to the PP.
• Required Uses
Printing, scanning, copying, network communications, administration
• Conditionally Mandatory Uses
PSTN faxing, storage and retrieval, field-replaceable nonvolatile storage.
• Optional Uses
Internal audit log storage, Image Overwrite
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3. SECURITY PROBLEM DEFINITION
This chapter describes the threats, organizational security policies, and the assumptions for the use of
the TOE.
3.1. Threats
Assets Protected by TOE
The TOE protects the following assets.
Table 5 Assets for User Data
Designation User Data type Definition
D.USER.DOC User Document Data Information contained in a User’s
Document, in electronic or hardcopy form
D.USER.JOB User Job Data Information related to a User’s
Document or Document Processing Job
Table 6 Assets for TSF Data
Designation TSF Data type Definition
D.TSF.PROT Protected TSF Data TSF Data for which alteration by a User
who is neither the data owner nor in an
Administrator role might affect the
security of the TOE, but for which
disclosure is acceptable
D.TSF.CONF Confidential TSF Data TSF Data for which either disclosure or
alteration by a User who is neither the
data owner nor in an Administrator role
might affect the security of the TOE
Threats
Table 7 identifies the threats addressed by the TOE.
Table 7 Threats
Designation Definition
T.UNAUTHORIZED_A
CCESS
An attacker may access (read, modify, or delete) User
Document Data or change (modify or delete) User Job Data in
the TOE through one of the TOE’s interfaces.
T.TSF_COMPROMISE An attacker may gain Unauthorized Access to TSF Data in the
TOE through one of the TOE’s interfaces.
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T.TSF_FAILURE A malfunction of the TSF may cause loss of security if the TOE
is permitted to operate.
T.UNAUTHORIZED_U
PDATE
An attacker may cause the installation of unauthorized
software on the TOE.
T.NET_COMPROMISE An attacker may access data in transit or otherwise
compromise the security of the TOE by monitoring or
manipulating network communication.
3.2. Organizational Security Policies
Table 8 describes the organizational security policies the TOE must comply with.
Table 8 Organizational Security Policies
Designation Definition
P.AUTHORIZATION Users must be authorized before performing Document
Processing and administrative functions.
P.AUDIT Security-relevant activities must be audited, and the log of
such actions must be protected and transmitted to an
External IT Entity.
P.COMMS_PROTECTI
ON
The TOE must be able to identify itself to other devices on the
LAN.
P.STORAGE_ENCRYP
TION
(conditionally
mandatory)
If the TOE stores User Document Data or Confidential TSF
Data on Field-Replaceable Nonvolatile Storage Devices, it will
encrypt such data on those devices.
P.KEY_MATERIAL
(conditionally
mandatory)
Cleartext keys, submasks, random numbers, or any other
values that contribute to the creation of encryption keys for
Field-Replaceable Nonvolatile Storage of User Document Data
or Confidential TSF Data must be protected from
unauthorized access and must not be stored on that storage
device.
P.FAX_FLOW
(conditionally
mandatory)
If the TOE provides a PSTN fax function, it will ensure
separation between the PSTN fax line and the LAN.
P.IMAGE_OVERWRIT
E
(optional)
Upon completion or cancellation of a Document Processing
job, the TOE shall overwrite residual image data from its Field-
Replaceable Nonvolatile Storage Devices.
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3.3. Assumptions
Table 9 describes the assumptions for the performance, operation, and use of the TOE.
Table 9 Assumptions
Designation Definition
A.PHYSICAL Physical security, commensurate with the value of the TOE
and the data it stores or processes, is assumed to be provided
by the environment.
A.NETWORK The Operational Environment is assumed to protect the TOE
from direct, public access to its LAN interface.
A.TRUSTED_ADMIN TOE Administrators are trusted to administer the TOE
according to site security policies.
A.TRAINED_USERS Authorized Users are trained to use the TOE according to site
security policies.
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4. Security Objectives
This chapter describes the security objectives for the environment. Table 10 defines the security
objectives for the TOE environment.
Table 10 Security Objectives for the TOE Environment
Designation Definition
OE.PHYSICAL_PROTE
CTION
The Operational Environment shall provide physical security,
commensurate with the value of the TOE and the data it
stores or processes.
OE.NETWORK_PROT
ECTION
The Operational Environment shall provide network security to
protect the TOE from direct, public access to its LAN interface.
OE.ADMIN_TRUST The TOE Owner shall establish trust that Administrators will
not use their privileges for malicious purposes.
OE.USER_TRAINING The TOE Owner shall ensure that Users are aware of site
security policies and have the competence to follow them.
OE.ADMIN_TRAININ
G
The TOE Owner shall ensure that Administrators are aware of
site security policies and have the competence to use
manufacturer’s guidance to correctly configure the TOE and
protect passwords and keys accordingly.
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5. EXTENDED COMPONENTS DEFINITION
Extended components in this section are defined in HCD-PP.
5.1. Extended Functional Requirements Definition
Class FAU: Security Audit
FAU_STG_EXT Extended: External Audit Trail Storage
Family Behavior:
This family defines requirements for the TSF to ensure that secure transmission of audit data from TOE
to an External IT Entity.
Component leveling:
FAU_STG_EXT.1 External Audit Trail Storage requires the TSF to use a trusted channel implementing a
secure protocol.
Management:
The following actions could be considered for the management functions in FMT:
• The TSF shall have the ability to configure the cryptographic functionality.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FAU_STG_EXT.1 Protected Audit Trail Storage
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation,
FTP_ITC.1 Inter-TSF trusted channel
FAU_STG_EXT.1.1 The TSF shall be able to transmit the generated audit data to an External IT Entity
using a trusted channel according to FTP_ITC.1.
Rationale:
The TSF is required that the transmission of generated audit data to an External IT Entity which relies on
a non-TOE audit server for storage and review of audit records. The storage of these audit records and
the ability to allow the administrator to review these audit records is provided by the Operational
Environment in that case. The Common Criteria does not provide a suitable SFR for the transmission of
audit data to an External IT Entity.
FAU_STG_EXT.1 Extended: External Audit Trail Storage interfaces 1
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This extended component protects the audit records, and it is therefore placed in the FAU class with a
single component.
Class FCS: Cryptographic Support
FCS_CKM_EXT Extended: Cryptographic Key Management
Family Behavior:
This family addresses the management aspects of cryptographic keys. Especially, this extended
component is intended for cryptographic key destruction.
Component leveling:
FCS_CKM_EXT.4 Cryptographic Key Material Destruction ensures not only keys but also key materials
that are no longer needed are destroyed by using an approved method.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FCS_CKM_EXT.4 Cryptographic Key Material Destruction
Hierarchical to: No other components.
Dependencies: [FCS_CKM.1(a) Cryptographic Key Generation (for
asymmetric keys), or
FCS_CKM.1(b) Cryptographic key generation
(Symmetric Keys)],
FCS_CKM.4 Cryptographic key destruction
FCS_CKM_EXT.4.1 The TSF shall destroy all plaintext secret and private cryptographic keys and
cryptographic critical security parameters when no longer needed.
Rationale:
Cryptographic Key Material Destruction is to ensure the keys and key materials that are no longer
needed are destroyed by using an approved method, and the Common Criteria does not provide a
suitable SFR for the Cryptographic Key Material Destruction.
FCS_CKM_EXT.4 Extended: Cryptographic Key Material Destruction
interfaces
4
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This extended component protects the cryptographic key and key materials against exposure, and it is
therefore placed in the FCS class with a single component.
FCS_HTTPS_EXT Extended: HTTPS selected
Family Behavior:
Components in this family define requirements for protecting remote management sessions between the
TOE and a Security Administrator. This family describes how HTTPS will be implemented. This is a new
family defined for the FCS Class.
Component leveling:
FCS_HTTPS_EXT.1 HTTPS selected, requires that HTTPS be implemented according to RFC 2818 and
supports TLS.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• Failure of HTTPS session establishment
FCS_HTTPS_EXT.1 HTTPS selected
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_HTTPS_EXT.1.1 The TSF shall implement the HTTPS protocol that complies with RFC 2818.
FCS_HTTPS_EXT.1.2 The TSF shall implement HTTPS using TLS as specified in FCS_HTTPS_EXT.1.
Rationale:
HTTPS is one of the secure communication protocols, and the Common Criteria does not provide a
suitable SFR for the communication protocols using cryptographic algorithms.
This extended component protects the communication data using cryptographic algorithms, and it is
therefore placed in the FCS class with a single component.
FCS_KYC_EXT Extended: Cryptographic Operation (Key Chaining)
FCS_HTTPS_EXT.1 Extended: HTTPS selected
Destruction interfaces
1
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Family Behavior:
This family provides the specification to be used for using multiple layers of encryption keys to ultimately
secure the protected data encrypted on the storage.
Component leveling:
FCS_KYC_EXT.1 Key Chaining, requires the TSF to maintain a key chain and specifies the characteristics
of that chain.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FCS_KYC_EXT.1 Key Chaining
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(e) Cryptographic operation (Key
Wrapping),
FCS_SMC_EXT.1 Extended: Submask Combining,
FCS_COP.1(i) Cryptographic operation (Key
Transport), FCS_KDF_EXT.1 Cryptographic Operation
(Key Derivation), and/or
FCS_COP.1(f) Cryptographic operation (Key
Encryption)].
FCS_KYC_EXT.1.1 The TSF shall maintain a key chain of: [selection: one, using a submask as the BEV or
DEK; intermediate keys originating from one or more submask(s) to the BEV or DEK using the following
method(s): [selection: key wrapping as specified in FCS_COP.1(e), key combining as specified in
FCS_SMC_EXT.1, key encryption as specified in FCS_COP.1(f), key derivation as specified in
FCS_KDF_EXT.1, key transport as specified in FCS_COP.1(i)]] while maintaining an effective strength of
[selection: 128-bit and 256-bit].
Rationale:
Key Chaining ensures that the TSF maintains the key chain, and also specifies the characteristics of that
chain. However, the Common Criteria does not provide a suitable SFR for the management of multiple
layers of encryption key to protect encrypted data.
FCS_KYC_EXT.1 Extended: Key Chaining 1
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This extended component protects the TSF data using cryptographic algorithms, and it is therefore
placed in the FCS class with a single component.
FCS_RBG_EXT Extended: Cryptographic Operation (Random Bit Generation)
Family Behavior:
This family defines requirements for random bit generation to ensure that it is performed in accordance
with selected standards and seeded by an entropy source.
Component leveling:
FCS_RBG_EXT.1 Random Bit Generation requires random bit generation to be performed in accordance
with selected standards and seeded by an entropy source.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FCS_RBG_EXT.1 Random Bit Generation
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_RBG_EXT.1.1 The TSF shall perform all deterministic random bit generation services in accordance
with [selection: ISO/IEC 18031:2011, NIST SP 800-90A] using [selection: Hash_DRBG (any),
HMAC_DRBG (any), CTR_DRBG (AES)].
FCS_RBG_EXT.1.2 The deterministic RBG shall be seeded by an entropy source that accumulates
entropy from [selection: [assignment: number of software-based sources] software-based noise
source(s), [assignment: number of hardware-based sources] hardware-based noise source(s)] with a
minimum of [selection: 128 bits, 256 bits] of entropy at least equal to the greatest security strength,
according to ISO/IEC 18031:2011 Table C.1 “Security strength table for hash functions”, of the keys and
hashes that it will generate.
Rationale:
Random bits/number will be used by the SFRs for key generation and destruction, and the Common
Criteria does not provide a suitable SFR for the random bit generation.
FCS_RBG_EXT.1 Extended: Random Bit Generation 1
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This extended component ensures the strength of encryption keys, and it is therefore placed in the FCS
class with a single component.
FCS_TLS_EXT Extended: TLS selected
Family Behavior:
This family addresses the ability for a server and/or a client to use TLS to protect data between a client
and the server using the TLS protocol.
Component leveling:
FCS_TLS_EXT.1 TLS selected, requires the TLS protocol implemented as specified.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• Failure of TLS session establishment
FCS_TLS_EXT.1 Extended: TLS selected
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(a) Cryptographic Key Generation (for
asymmetric keys)
FCS_COP.1(a) Cryptographic Operation (Symmetric
encryption/decryption)
FCS_COP.1(b) Cryptographic Operation (for signature
generation/verification)
FCS_COP.1(c) Cryptographic Operation (Hash
Algorithm)
FCS_COP.1(g) Cryptographic Operation (for keyed-
hash message authentication)
FCS_RBG_EXT.1 Extended: Cryptographic Operation
(Random Bit Generation)
FCS_TLS_EXT.1.1 The TSF shall implement one or more of the following protocols [selection: TLS 1.0
(RFC 2246), TLS 1.1 (RFC 4346), TLS 1.2 (RFC 5246)] supporting the following cipher suites:
Mandatory cipher suites:
TLS_RSA_WITH_AES_128_CBC_SHA
FCS_TLS_EXT.1 Extended: TLS selected 1
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Optional cipher suites:
[selection:
None
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_ SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_ SHA256
TLS_DHE_RSA_WITH_AES_256_CBC_ SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
].
Rationale:
TLS is one of the secure communication protocols, and the Common Criteria does not provide a suitable
SFR for the communication protocols using cryptographic algorithms.
This extended component protects the communication data using cryptographic algorithms, and it is
therefore placed in the FCS class with a single component.
Class FDP: User Data Protection
FDP_DSK_EXT Extended: Protection of Data on Disk
Family Behavior:
This family is to mandate the encryption of all protected data written to the storage.
Component leveling:
FDP_DSK_EXT.1 Extended: Protection of Data on Disk 1
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FDP_DSK_EXT.1 Extended: Protection of Data on Disk, requires the TSF to encrypt all the Confidential
TSF and User Data stored on the Field-Replaceable Nonvolatile Storage Devices in order to avoid storing
these data in plaintext on the devices.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FDP_DSK_EXT.1 Protection of Data on Disk
Hierarchical to: No other components.
Dependencies: FCS_COP.1(d) Cryptographic operation (AES Data
Encryption/Decryption)
FDP_DSK_EXT.1.1 The TSF shall [selection: perform encryption in accordance with FCS_COP.1(d), use a
self-encrypting Field-Replaceable Nonvolatile Storage Device that is separately CC certified to conform to
the FDE EE cPP] such that any Field- Replaceable Nonvolatile Storage Device contains no plaintext User
Document Data and no plaintext confidential TSF Data.
FDP_DSK_EXT.1.2 The TSF shall encrypt all protected data without user intervention.
Rationale:
Extended: Protection of Data on Disk is to specify that encryption of any confidential data without user
intervention, and the Common Criteria does not provide a suitable SFR for the Protection of Data on
Disk.
This extended component protects the Data on Disk, and it is therefore placed in the FDP class with a
single component.
FDP_FXS_EXT Extended: Fax Separation
Family Behavior:
This family addresses the requirements for separation between PSTN fax line and the LAN to which TOE
is connected.
Component leveling:
FDP_FXS_EXT.1 Fax Separation, requires the fax interface cannot be used to create a network bridge
between a PSTN and the LAN to which TOE is connected.
FDP_FXS_EXT.1 Extended: Fax Separation 1
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Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FDP_FXS_EXT.1 Fax separation
Hierarchical to: No other components.
Dependencies: No dependencies.
FDP_FXS_EXT.1.1 The TSF shall prohibit communication via the fax interface, except transmitting or
receiving User Data using fax protocols.
Rationale:
Fax Separation is to protect a LAN against attack from PSTN line, and the Common Criteria does not
provide a suitable SFR for the Protection of TSF or User Data.
This extended component protects the TSF Data or User Data, and it is therefore placed in the FDP class
with a single component.
Class FIA: Identification and Authentication
FIA_PMG_EXT Extended: Password Management
Family Behavior:
This family defines requirements for the attributes of passwords used by administrative users to ensure
that strong passwords and passphrases can be chosen and maintained.
Component leveling:
FIA_PMG _EXT.1 Password management requires the TSF to support passwords with varying
composition requirements, minimum lengths, maximum lifetime, and similarity constraints.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
FIA PMG EXT.1 Extended: Password Management 1
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The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FIA_PMG _EXT.1 Password management
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_PMG _EXT.1.1 The TSF shall provide the following password management capabilities for User
passwords:
Passwords shall be able to be composed of any combination of upper and lower case letters, numbers,
and the following special characters: [selection: “!”, “@”, “#”, “$”, “%”, “^”, “&”, “*”, “(“, “)”, [assignment:
other characters]];
Minimum password length shall be settable by an Administrator, and have the capability to require
passwords of 15 characters or greater.
Rationale:
Password Management is to ensure the strong authentication between the endpoints of communication,
and the Common Criteria does not provide a suitable SFR for the Password Management.
This extended component protects the TOE by means of password management, and it is therefore
placed in the FIA class with a single component.
Class FPT: Protection of the TSF
FPT_KYP_EXT Extended: Protection of Key and Key Material
Family Behavior:
This family addresses the requirements for keys and key materials to be protected if and when written to
nonvolatile storage.
Component leveling:
FPT_KYP_EXT.1 Extended: Protection of key and key material, requires the TSF to ensure that no
plaintext key or key materials are written to nonvolatile storage.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
FPT_KYP_EXT.1 Extended: Protection of key and key material 1
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The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FPT_KYP_EXT.1 Protection of Key and Key Material
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_KYP_EXT.1.1 The TSF shall not store plaintext keys that are part of the keychain specified by
FCS_KYC_EXT.1 in any Field-Replaceable Nonvolatile Storage Device, and not store any such plaintext
key on a device that uses the key for its encryption.
Rationale:
Protection of Key and Key Material is to ensure that no plaintext key or key material are written to
nonvolatile storage, and the Common Criteria does not provide a suitable SFR for the protection of key
and key material.
This extended component protects the TSF data, and it is therefore placed in the FPT class with a single
component.
FPT_SKP_EXT Extended: Protection of TSF Data
Family Behavior:
This family addresses the requirements for managing and protecting the TSF data, such as cryptographic
keys. This is a new family modelled as the FPT Class.
Component leveling:
FPT_SKP_EXT.1 Protection of TSF Data (for reading all symmetric keys), requires preventing symmetric
keys from being read by any user or subject. It is the only component of this family.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FPT_SKP_EXT.1 Protection of TSF Data
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_SKP_EXT.1 Extended: Protection of TSF Data 1
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FPT_SKP_EXT.1.1 The TSF shall prevent reading of all pre-shared keys, symmetric keys, and private keys.
Rationale:
Protection of TSF Data is to ensure the pre-shared keys, symmetric keys and private keys are protected
securely, and the Common Criteria does not provide a suitable SFR for the protection of such TSF data.
This extended component protects the TOE by means of strong authentication using Pre- shared Key,
and it is therefore placed in the FPT class with a single component.
FPT_TST_EXT Extended: TSF testing
Family Behavior:
This family addresses the requirements for self-testing the TSF for selected correct operation.
Component leveling:
FPT_TST_EXT.1 TSF testing requires a suite of self-testing to be run during initial start-up in order to
demonstrate correct operation of the TSF.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FPT_TST_EXT.1 TSF testing
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_TST_EXT.1.1 The TSF shall run a suite of self-tests during initial start-up (and power on) to
demonstrate the correct operation of the TSF.
Rationale:
TSF testing is to ensure the TSF can be operated correctly, and the Common Criteria does not provide a
suitable SFR for the TSF testing. There is no SFR defined for TSF testing.
This extended component protects the TOE, and it is therefore placed in the FPT class with a single
component.
FPT_TUD_EXT Extended: Trusted Update
FPT_TST_EXT.1 Extended: TSF testing 1
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Family Behavior:
This family defines requirements for the TSF to ensure that only administrators can update the TOE
firmware/software, and that such firmware/software is authentic.
Component leveling:
FPT_TUD_EXT.1 Trusted Update, ensures authenticity and access control for updates.
Management:
The following actions could be considered for the management functions in FMT:
• There are no management actions foreseen.
Audit:
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the
PP/ST:
• There are no auditable events foreseen.
FPT_TUD_EXT.1 Trusted Update
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(b) Cryptographic Operation (for signature
generation/verification), or
FCS_COP.1(c) Cryptographic operation (Hash
Algorithm)].
FPT_TUD_EXT.1.1 The TSF shall provide authorized administrators the ability to query the current
version of the TOE firmware/software.
FPT_TUD_EXT.1.2 The TSF shall provide authorized administrators the ability to initiate updates to TOE
firmware/software.
FPT_TUD_EXT.1.3 The TSF shall provide a means to verify firmware/software updates to the TOE using
a digital signature mechanism and [selection: published hash, no other functions] prior to installing those
updates.
Rationale:
Firmware/software is a form of TSF Data, and the Common Criteria does not provide a suitable SFR for
the management of firmware/software. In particular, there is no SFR defined for importing TSF Data.
This extended component protects the TOE, and it is therefore placed in the FPT class with a single
component.
FPT_TUD_EXT.1 Extended: Trusted Update 1
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6. SECURITY REQUIREMENTS
This chapter describes the security functional requirements, security assurance requirements, and
security requirement rational.
The definitions of terms used in this chapter are as follows.
6.1. Notation
Bold typeface indicates the portion of an SFR that has been completed or refined in HCD-PP, relative to
the original SFR definition in Common Criteria Part 2 or to its Extended Component Definition.
Bold italic typeface indicates the portion of an SFR that has been partially completed or refined in HCD-
PP. It also must be selected and/or completed in this ST.
Underlined bold italic typeface in parentheses that follows underlined bold typeface indicates the
portion of an SFR that has been partially completed in HCD-PP and refined in this ST.
Italic typeface indicates the text within an SFR that must be selected and/or completed in this ST.
Gray italic typeface indicates the text within an SFR that has not been selected in this ST.
Underlined italic typeface indicates the text within an SFR that has been assigned in this ST.
The definition of SFR components followed by (a), (b)… is as described in the PP. SFR components
followed by (a1), (a2)… represent required iterations of iterations.
6.2. Security Functional Requirements
Security functional requirements provided by the TOE are described below.
Class FAU: Security Audit
FAU_GEN.1 Audit data generation
(for O.AUDIT)
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) All auditable events specified in Table 11, [assignment: no
other auditable events].
FAU_GEN.1.2 The TSF shall record within each audit record at least the
following information:
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a) Date and time of the event, type of event, subject identity (if
applicable), and the outcome (success or failure) of the event;
and
b) For each audit event type, based on the auditable event
definitions of the functional components included in the PP/ST,
additional information specified in Table 11, [assignment: no
other relevant information].
Table 11 Auditable Events
Auditable Events Relevant SFR Additional
Information
Job completion FDP_ACF.1 Type of job
Unsuccessful User authentication FIA_UAU.1 None
Unsuccessful User identification FIA_UID.1 None
Use of management functions FMT_SMF.1 None
Modification to the group of Users that
are part of a role
FMT_SMR.1 None
Changes to the time FPT_STM.1 None
Failure to establish session FTP_ITC.1,
FTP_TRP.1(a),
FTP_TRP.1(b)
Reason for
failure
FAU_GEN.2 User identity association
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FIA_UID.1 Timing of identification
FAU_GEN.2.1 For audit events resulting from actions of identified users, the
TSF shall be able to associate each auditable event with the
identity of the user that caused the event.
FAU_SAR.1 Audit review
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FAU_SAR.1.1 The TSF shall provide [assignment: U.ADMIN] with the
capability to read all records from the audit records.
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FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for
the user to interpret the information.
FAU_SAR.2 Restricted audit review
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: FAU_SAR.1 Audit review
FAU_SAR.2.1 The TSF shall prohibit all users read access to the audit records,
except those users that have been granted explicit read-access.
FAU_STG.1 Protected audit trail storage
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FAU_STG.1.1 The TSF shall protect the stored audit records in the audit trail
from unauthorised deletion.
FAU_STG.1.2 The TSF shall be able to prevent unauthorised modifications to
the stored audit records in the audit trail.
FAU_STG.4 Prevention of audit data loss
(for O.AUDIT)
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 Refinement: The TSF shall [selection, choose one of: “ignore
audited events”, “prevent audited events, except those taken
by the authorised user with special rights”, “overwrite the
oldest stored audit records”] and [assignment: no other
actions to be taken] if the audit trail is full.
FAU_STG_EXT.1 Extended: External Audit Trail Storage
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation,
FTP_ITC.1 Inter-TSF trusted channel.
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FAU_STG_EXT.1.1 The TSF shall be able to transmit the generated audit data to
an External IT Entity using a trusted channel according to
FTP_ITC.1.
Class FCS: Cryptographic Support
FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric keys)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(b) Cryptographic Operation (for signature
generation/verification), or
FCS_COP.1(i) Cryptographic operation (Key Transport)]
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_CKM.1.1(a) Refinement: The TSF shall generate asymmetric cryptographic
keys used for key establishment in accordance with
[selection:
• NIST Special Publication 800-56A, “Recommendation for
Pair-Wise Key Establishment Schemes Using Discrete
Logarithm Cryptography” for finite field-based key
establishment schemes;
• NIST Special Publication 800-56A, “Recommendation for
Pair-Wise Key Establishment Schemes Using Discrete
Logarithm Cryptography” for elliptic curve-based key
establishment schemes and implementing “NIST curves” P-
256, P-384 and [selection: P-521, no other curves] (as
defined in FIPS PUB 186-4, “Digital Signature Standard”)
• NIST Special Publication 800-56B, “Recommendation for
Pair-Wise Key Establishment Schemes Using Integer
Factorization Cryptography” for RSA-based key
establishment schemes
] and specified cryptographic key sizes equivalent to, or
greater than, a symmetric key strength of 112 bits.
FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)
(for O.COMMS_PROTECTION, O.STORAGE_ENCRYPTION)
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(a) Cryptographic Operation (Symmetric
encryption/decryption), or
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FCS_COP.1(d) Cryptographic Operation (AES Data
Encryption/Decryption), or
FCS_COP.1(e) Cryptographic Operation (Key Wrapping), or
FCS_COP.1(f) Cryptographic operation (Key Encryption), or
FCS_COP.1(g) Cryptographic Operation (for keyed-hash
message authentication), or
FCS_COP.1(h) Cryptographic Operation (for keyed-hash
message authentication)]
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_RBG_EXT.1 Extended: Cryptographic Operation (Random
Bit Generation)
FCS_CKM.1.1(b) Refinement: The TSF shall generate symmetric cryptographic
keys using a Random Bit Generator as specified in
FCS_RBG_EXT.1 and specified cryptographic key sizes
[selection: 128-bit, 256-bit] that meet the following: No
Standard.
FCS_CKM.4 Cryptographic key destruction
(for O.COMMS_PROTECTION, O.STORAGE_ENCRYPTION,
O.PURGE_DATA)
Hierarchical to: No other components.
Dependencies: [FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric
keys), or
FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)]
FCS_CKM.4.1 Refinement: The TSF shall destroy cryptographic keys in
accordance with a specified cryptographic key destruction
method [selection:
For volatile memory, the destruction shall be executed by
[selection: powering off a device, [assignment: other
mechanism that ensures keys are destroyed]].
For nonvolatile storage, the destruction shall be executed by
a [selection: single, three or more times] overwrite of key
data storage location consisting of [selection: a pseudo
random pattern using the TSF’s RBG (as specified in
FCS_RBG_EXT.1), a static pattern], followed by a [selection:
read-verify, none]. If read-verification of the overwritten
data fails, the process shall be repeated again;
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] that meets the following: [selection: NIST SP800-88, no
standard].
FCS_CKM_EXT.4 Cryptographic Key Material Destruction
(for O.COMMS_PROTECTION, O.STORAGE_ENCRYPTION,
O.PURGE_DATA)
Hierarchical to: No other components.
Dependencies: [FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric
keys), or
FCS_CKM.1(b) Cryptographic key generation (Symmetric
Keys)],
FCS_CKM.4 Cryptographic key destruction
FCS_CKM_EXT.4.1 The TSF shall destroy all plaintext secret and private
cryptographic keys and cryptographic critical security
parameters when no longer needed.
FCS_COP.1(a) Cryptographic Operation (Symmetric encryption/decryption)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(a) Refinement: The TSF shall perform encryption and decryption
in accordance with a specified cryptographic algorithm AES
operating in [assignment: CBC, GCM] and cryptographic key
sizes 128-bits and 256-bits that meets the following:
FIPS PUB 197, “Advanced Encryption Standard (AES)”
[Selection: NIST SP 800-38A, NIST SP 800-38B, NIST SP 800-
38C, NIST SP 800-38D]
FCS_COP.1(b1) Cryptographic Operation (for signature
generation/verification)
(for O.UPDATE VERIFICATION)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric
keys)
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FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(b1) Refinement: The TSF shall perform cryptographic signature
services in accordance with a [selection:
-Digital Signature Algorithm (DSA) with key sizes (modulus)
of [assignment: 2048 bits or greater],
RSA Digital Signature Algorithm (rDSA) with key sizes
(modulus) of [assignment: 2048 bits or greater], or
-Elliptic Curve Digital Signature Algorithm (ECDSA) with key
sizes of [assignment: 256 bits or greater]]
that meets the following [selection:
Case: Digital Signature Algorithm FIPS PUB 186-4, “Digital
Signature Standard”
Case: RSA Digital Signature Algorithm FIPS PUB 186-4,
“Digital Signature Standard”
Case: Elliptic Curve Digital Signature Algorithm FIPS PUB
186-4, “Digital Signature Standard”
The TSF shall implement “NIST curves” P-256, P384 and
[selection: P521, no other curves] (as defined in FIPS PUB
186-4, “Digital Signature Standard”).
].
FCS_COP.1(b2) Cryptographic Operation (for signature
generation/verification)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric
keys)
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(b2) Refinement: The TSF shall perform cryptographic signature
services in accordance with a [selection:
-Digital Signature Algorithm (DSA) with key sizes (modulus)
of [assignment: 2048 bits or greater],
RSA Digital Signature Algorithm (rDSA) with key sizes
(modulus) of [assignment: 2048 bits, 3072 bits], or
-Elliptic Curve Digital Signature Algorithm (ECDSA) with key
sizes of [assignment: 256 bits, 384bits, 521bits]]
that meets the following [selection:
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Case: Digital Signature Algorithm FIPS PUB 186-4, “Digital
Signature Standard”
Case: RSA Digital Signature Algorithm FIPS PUB 186-4,
“Digital Signature Standard”
Case: Elliptic Curve Digital Signature Algorithm FIPS PUB
186-4, “Digital Signature Standard”
The TSF shall implement “NIST curves” P-256, P384 and
[selection: P521, no other curves] (as defined in FIPS PUB
186-4, “Digital Signature Standard”).
].
FCS_COP.1(c1) Cryptographic operation (Hash Algorithm)
(selected in FPT_TUD_EXT.1.3, or with FCS_SNI_EXT.1.1)
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_COP.1.1(c1) Refinement: The TSF shall perform cryptographic hashing
services in accordance with [selection: SHA-1, SHA-256, SHA-
384, SHA-512] that meet the following: [ISO/IEC 10118-
3:2004].
FCS_COP.1(c2) Cryptographic operation (Hash Algorithm)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_COP.1.1(c2) Refinement: The TSF shall perform cryptographic hashing
services in accordance with [selection: SHA-1, SHA-256, SHA-
384, SHA-512] that meet the following: [ISO/IEC 10118-
3:2004].
FCS_COP.1(d) Cryptographic operation (AES Data Encryption/Decryption)
(for O. STORAGE_ENCRYPTION)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)]
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(d) The TSF shall perform data encryption and decryption in
accordance with a specified cryptographic algorithm AES used
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in [selection: CBC, GCM, XTS] mode and cryptographic key
sizes [selection: 128 bits, 256 bits] that meet the following:
AES as specified in ISO/IEC 18033-3, [selection: CBC as
specified in ISO/IEC 10116, GCM as specified in ISO/IEC
19772, and XTS as specified in IEEE1619].
FCS_COP.1(f) Cryptographic operation (Key Encryption)
(selected from FCS_KYC_EXT.1.1)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(f) Refinement: The TSF shall perform key encryption and
decryption in accordance with a specified cryptographic
algorithm AES used in [[selection: CBC, GCM] mode] and
cryptographic key sizes [selection: 128 bits, 256 bits] that
meet the following: [AES as specified in ISO /IEC 18033-3,
[selection: CBC as specified in ISO/IEC 10116, GCM as
specified in ISO/IEC 19772].
FCS_COP.1(g) Cryptographic Operation (for keyed-hash message
authentication)
(selected with FCS_IPSEC_EXT.1.4)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(b) Cryptographic key generation (Symmetric Keys)
FCS_CKM_EXT.4 Extended: Cryptographic Key Material
Destruction
FCS_COP.1.1(g) Refinement: The TSF shall perform keyed-hash message
authentication in accordance with a specified cryptographic
algorithm HMAC-[selection: SHA-1, SHA-224, SHA-256, SHA-
384, SHA-512], key size [assignment: 160, 256, 384], and
message digest sizes [selection: 160, 224, 256, 384, 512] bits
that meet the following: FIPS PUB 198-1, "The Keyed-Hash
Message Authentication Code, and FIPS PUB 180-3, “Secure
Hash Standard.”
FCS_HTTPS_EXT.1 HTTPS selected
(selected in FTP_ITC.1.1, FTP_TRP.1.1)
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Hierarchical to: No other components.
Dependencies: FCS_TLS_EXT.1 Extended: TLS selected
FCS_HTTPS_EXT.1.1 The TSF shall implement the HTTPS protocol that complies
with RFC 2818.
FCS_HTTPS_EXT.1.2 The TSF shall implement HTTPS using TLS as specified in
FCS_TLS_EXT.1.
FCS_KYC_EXT.1 Key Chaining
(for O.STORAGE_ENCRYPTION)
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(e) Cryptographic operation (Key Wrapping), or
FCS_SMC_EXT.1 Extended: Submask Combining, or
FCS_COP.1(f) Cryptographic operation (Key Encryption), or
FCS_KDF_EXT.1 Cryptographic Operation (Key Derivation),
and/or
FCS_COP.1(i) Cryptographic operation (Key Transport)]
FCS_KYC_EXT.1.1 The TSF shall maintain a key chain of: [selection: one, using a
submask as the BEV or DEK; intermediate keys originating from
one or more submask(s) to the BEV or DEK using the following
method(s): [selection: key wrapping as specified in
FCS_COP.1(e), key combining as specified in FCS_SMC_EXT.1,
key encryption as specified in FCS_COP.1(f), key derivation as
specified in FCS_KDF_EXT.1, key transport as specified in
FCS_COP.1(i)]] while maintaining an effective strength of
[selection: 128 bits, 256 bits].
FCS_RBG_EXT.1 Cryptographic Operation (Random Bit Generation)
(for O.STORAGE_ENCRYPTION and O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_RBG_EXT.1.1 The TSF shall perform all deterministic random bit generation
services in accordance with [selection: ISO/IEC 18031:2011,
NIST SP 800-90A] using [selection: Hash_DRBG (any),
HMAC_DRBG (any), CTR_DRBG (AES)].
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FCS_RBG_EXT.1.2 The deterministic RBG shall be seeded by at least one entropy
source that accumulates entropy from [selection:
[assignment:1] software-based noise source(s), [assignment:
number of hardware-based sources] hardware-based noise
source(s)] with a minimum of [selection: 128 bits, 256 bits] of
entropy at least equal to the greatest security strength,
according to ISO/IEC18031:2011 Table C.1 “Security Strength
Table for Hash Functions”, of the keys and hashes that it will
generate.
FCS_TLS_EXT.1 TLS selected
(selected in FTP_ITC.1.1, FTP_TRP.1.1)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric
keys)
FCS_COP.1(a) Cryptographic Operation (Symmetric
encryption/decryption)
FCS_COP.1(b) Cryptographic Operation (for signature
generation/verification)
FCS_COP.1(c) Cryptographic Operation (Hash Algorithm)
FCS_COP.1(g) Cryptographic Operation (for keyed-hash
message authentication)
FCS_RBG_EXT.1 Extended: Cryptographic Operation (Random
Bit Generation)
FCS_TLS_EXT.1.1 The TSF shall implement one or more of the following
protocols [selection: TLS 1.0 (RFC 2246), TLS 1.1 (RFC 4346),
TLS 1.2 (RFC 5246)] supporting the following cipher suites:
Mandatory Ciphersuites:
TLS_RSA_WITH_AES_128_CBC_SHA
Optional Ciphersuites:
[selection:
None
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_ SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_ SHA256
TLS_DHE_RSA_WITH_AES_256_CBC_ SHA256
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TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
].
Class FDP: User Data Protection
FDP_ACC.1 Subset access control
(for O.ACCESS_CONTROL and O.USER_AUTHORIZATION)
Hierarchical to: No other components.
Dependencies: FDP_ACF.1 Security attribute-based access control
FDP_ACC.1.1 Refinement: The TSF shall enforce the User Data Access Control
SFP on subjects, objects, and operations among subjects and
objects specified in Table 12 and Table 13.
FDP_ACF.1 Security attribute-based access control
(for O.ACCESS_CONTROL and O.USER_AUTHORIZATION)
Hierarchical to: No other components.
Dependencies: FDP_ACC.1 Subset access control
FMT_MSA.3 Static attribute initialization
FDP_ACF.1.1 Refinement: The TSF shall enforce the User Data Access
Control SFP to objects based on the following: subjects, objects,
and attributes specified in Table 12 and Table 13.
FDP_ACF.1.2 Refinement: The TSF shall enforce the following rules to
determine if an operation among controlled subjects and
controlled objects is allowed: rules governing access among
controlled subjects and controlled objects using controlled
operations on controlled objects specified in Table 12 and
Table 13.
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FDP_ACF.1.3 Refinement: The TSF shall explicitly authorize access of
subjects to objects based on the following additional rules:
[assignment: none].
FDP_ACF.1.4 Refinement: The TSF shall explicitly deny access of subjects to
objects based on the following additional rules: [assignment:
none].
Table 12 D.USER.DOC Access Control SFP
"Create" "Read" "Modify" "Delete"
Print
Operation: Submit a
document to be
printed
View image or
Release
printed
output
Modify
stored
document
Delete
stored
document
Job owner (note 1) denied
U.ADMIN denied
U.NORMAL denied denied denied
Unauthenticated denied denied denied denied
Scan Operation: Submit a
document for
scanning
View scanned
image
Modify
stored
image
Delete
stored
image
Job owner (note 2) denied
U.ADMIN denied
U.NORMAL denied denied denied
Unauthenticated denied denied denied denied
Copy Operation: Submit a
document for
copying
View scanned
image or
Release
printed copy
output
Modify
stored
image
Delete
stored
image
Job owner (note 2) denied
U.ADMIN denied
U.NORMAL denied denied denied
Unauthenticated denied denied denied denied
Fax send Operation: Submit a
document to
send as a fax
View scanned
image
Modify
stored
image
Delete
stored
image
Job owner (note 2) denied
U.ADMIN denied
U.NORMAL denied denied denied
Unauthenticated denied denied denied denied
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Fax receive Operation: Receive a fax
and store it
View fax
image or
Release
printed fax
output
Modify
image of
received
fax
Delete
image of
received
fax
Fax owner (note 3) denied
U.ADMIN (note 4) denied
U.NORMAL (note 4) denied denied denied
Unauthenticated (note 4) denied denied denied
Storage/Re
trieval
Operation: Store document Retrieve
stored
document
Modify
stored
document
Delete
stored
document
Job owner (note 1) denied
U.ADMIN (note 5) denied (note 5)
U.NORMAL denied denied denied
Unauthenticated denied denied denied denied
Table 13 D.USER.JOB Access Control SFP
"Create" * "Read" "Modify" "Delete"
Print
Operation: Create print job View print
queue/log
Modify
print job
Cancel
print job
Job owner (note 1)
U.ADMIN
U.NORMAL denied denied
Unauthenticated denied denied denied denied
Scan Operation: Create scan job View scan
status/log
Modify
scan job
Cancel
scan job
Job owner (note 2) denied
U.ADMIN denied
U.NORMAL denied denied
Unauthenticated Denied denied denied denied
Copy Operation: Create copy job View copy
status/log
Modify
copy job
Cancel
copy job
Job owner (note 2)
U.ADMIN denied
U.NORMAL denied denied
Unauthenticated denied denied denied denied
Fax send Operation: Create fax send
job
View fax job
status/log
Modify fax
send job
Cancel fax
send job
Job owner (note 2) denied
U.ADMIN denied
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U.NORMAL denied denied
Unauthenticated denied denied denied denied
Fax receive Operation: Create fax
receive job
View fax
receive
status/log
Modify fax
receive job
Cancel fax
receive job
Fax owner (note 3) denied
U.ADMIN (note 4) denied
U.NORMAL (note 4) denied denied
Unauthenticated (note 4) denied denied denied
Storage/Re
trieval
Operation: Create storage /
retrieval job
View storage
/ retrieval
log
Modify
storage /
retrieval job
Cancel
storage /
retrieval
job
Job owner (note 1) denied
U.ADMIN denied
U.NORMAL denied denied
Unauthenticated denied denied denied denied
Note 1: Job Owner is identified by a credential or assigned to an authorized User as part of the process
of submitting a print or storage Job.
Note 2: Job Owner is assigned to an authorized User as part of the process of initiating a scan, copy, fax
send, or retrieval Job.
Note 3: Job Owner of received faxes is assigned by configuration. Ownership of received faxes is assigned
to a specific user.
Note 4: PSTN faxes are received from outside of the TOE, they are not initiated by Users of the TOE.
Note 5: Key Operator can operate the DOC/JOB of all users, while SA can operate the DOC/JOB of his/her
own only.
FDP_DSK_EXT.1 Protection of Data on Disk
(for O.STORAGE_ENCRYPTION)
Hierarchical to: No other components.
Dependencies: FCS_COP.1(d) Cryptographic operation (AES Data
Encryption/Decryption).
FDP_DSK_EXT.1.1 The TSF shall [selection: perform encryption in accordance with
FCS_COP.1(d), use a self-encrypting Field-Replaceable
Nonvolatile Storage Device that is separately CC certified to
conform to the FDE EE cPP], such that any Field- Replaceable
Nonvolatile Storage Device contains no plaintext User
Document Data and no plaintext Confidential TSF Data.
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FDP_DSK_EXT.1.2 The TSF shall encrypt all protected data without user
intervention.
FDP_FXS_EXT.1 Fax separation
(for O.FAX_NET_SEPARATION)
Hierarchical to: No other components.
Dependencies: No dependencies.
FDP_FXS_EXT.1.1 The TSF shall prohibit communication via the fax interface,
except transmitting or receiving User Data using fax protocols.
FDP_RIP.1(a) Subset residual information protection
(for O.IMAGE_OVERWRITE)
Hierarchical to: No other components.
Dependencies: No dependencies.
FDP_RIP.1.1(a) Refinement: The TSF shall ensure that any previous
information content of a resource is made unavailable by
overwriting data upon the deallocation of the resource from
the following objects: D.USER.DOC.
Class FIA: Identification and Authentication
FIA_AFL.1 Authentication failure handling
(for O.USER_I&A)
Hierarchical to: No other components.
Dependencies: FIA_UAU.1 Timing of authentication
FIA_AFL.1.1 The TSF shall detect when [selection: [assignment: 5], an
administrator configurable positive integer within [assignment:
range of acceptable values]] unsuccessful authentication
attempts occur related to [assignment: User authentication
(with local authentication)].
FIA_AFL.1.2 When the defined number of unsuccessful authentication
attempts has been [selection: met, surpassed], the TSF shall
[assignment: Identification and authentication of relevant user
is inhibited until TOE is cycled.].
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FIA_ATD.1 User attribute definition
(for O.USER_AUTHORIZATION)
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_ATD.1.1 The TSF shall maintain the following list of security attributes
belonging to individual users: [assignment: User Identifier, User
Role].
FIA_PMG_EXT.1 Password Management
(for O.USER_I&A)
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_PMG_EXT.1.1 The TSF shall provide the following password management
capabilities for user passwords:
・ Passwords shall be able to be composed of any combination
of upper and lower case letters, numbers, and the following
special characters: [selection: “!”, “@”, “#”, “$”, “%”, “^”, “&”,
“*”, “(“, “)”, [assignment: ” (space)”, “””, “’”, “+”, “,”, “-“, “/”, “:”,
“;”, “<”, “=”, “>”, “?”, “[“, “¥”, “]”, “_”, “`”, “{“, “|”, “}”, “~”]];
・ Minimum password length shall be settable by an
Administrator, and have the capability to require
passwords of 15 characters or greater;
FIA_UAU.1 Timing of authentication
(for O.USER_I&A)
Hierarchical to: No other components.
Dependencies: FIA_UID.1 Timing of identification
FIA_UAU.1.1 Refinement: The TSF shall allow [assignment: storing the fax
data received from public telephone line] on behalf of the
user to be performed before the user is authenticated.
FIA_UAU.1.2 The TSF shall require each user to be successfully
authenticated before allowing any other TSF-mediated
actions on behalf of that user.
FIA_UAU.7 Protected authentication feedback
(for O.USER_I&A)
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Hierarchical to: No other components.
Dependencies: FIA_UAU.1 Timing of authentication
FIA_UAU.7.1 The TSF shall provide only [assignment: ●] to the user while
the authentication is in progress.
FIA_UID.1 Timing of identification
(for O.USER_I&A and O.ADMIN_ROLES)
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_UID.1.1 Refinement: The TSF shall allow [assignment: storing the fax
data received from public telephone line] on behalf of the
user to be performed before the user is identified.
FIA_UID.1.2 The TSF shall require each user to be successfully identified
before allowing any other TSF-mediated actions on behalf
of that user.
FIA_USB.1 User-subject binding
(for O.USER_I&A)
Hierarchical to: No other components.
Dependencies: FIA_ATD.1 User attribute definition
FIA_USB.1.1 The TSF shall associate the following user security attributes
with subjects acting on the behalf of that user: [assignment:
User Identifier, User Role].
FIA_USB.1.2 The TSF shall enforce the following rules on the initial
association of user security attributes with subjects acting
on the behalf of users: [assignment: none].
FIA_USB.1.3 The TSF shall enforce the following rules governing changes
to the user security attributes associated with subjects
acting on the behalf of users: [assignment: none].
Class FMT: Security Management
FMT_MOF.1 Management of security functions behavior
(for O.ADMIN_ROLES)
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Hierarchical to: No other components.
Dependencies: FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MOF.1.1 Refinement: The TSF shall restrict the ability to [selection:
determine the behavior of, disable, enable, modify the
behavior of] the functions [assignment: List of security
functions in Table 14] to U.ADMIN.
Table 14 List of Security Functions
Function Operation
User Authentication enable, disable
Auditing enable, disable
Trusted communications enable, disable,
modify the behavior
Storage Data Encryption enable, disable
Overwrite Storage enable, disable,
modify the behavior
Firmware update enable, disable
Self Test enable, disable
FMT_MSA.1 Management of security attributes
(for O.ACCESS_CONTROL and O.USER_AUTHORIZATION)
Hierarchical to: No other components.
Dependencies: FDP_ACC.1 Subset access control
FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MSA.1.1 Refinement:The TSF shall enforce the User Data Access
Control SFP to restrict the ability to [selection:
change_default, query, modify, delete, [assignment:
creation]] the security attributes [assignment: the security
attributes listed in Table 15] to [assignment: the roles listed
in Table 15].
Table 15 Security Attributes and Authorized Roles
Security attributes Operation Role
User identifier (Key Operator case) modify Key Operator
User identifier (General case) modify,
delete, creation
U.ADMIN
User Role (Key Operator case) query Key Operator
User Role (General case) query, modify U.ADMIN
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FMT_MSA.3 Static attribute initialization
(for O.ACCESS_CONTROL and O.USER_AUTHORIZATION)
Hierarchical to: No other components.
Dependencies: FMT_MSA.1 Management of security attributes
FMT_SMR.1 Security roles
FMT_MSA.3.1 Refinement:The TSF shall enforce the User Data Access
Control SFP to provide [selection, choose one of: restrictive,
permissive, [assignment: none]] default values for security
attributes that are used to enforce the SFP.
FMT_MSA.3.2 Refinement:The TSF shall allow the [selection: U.ADMIN, no
role] to specify alternative initial values to override the
default values when an object or information is created.
FMT_MTD.1 Management of TSF data
(for O.ACCESS CONTROL)
Hierarchical to: No other components.
Dependencies: FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MTD.1.1 Refinement: The TSF shall restrict the ability to perform the
specified operations on the specified TSF Data to the
roles specified in Table 16.
Table 16 Management of TSF Data
Data Operation Authorized Role(s)
TSF Data owned by U.NORMAL or associated with documents or jobs owned by
U.NORMAL.
U.NORMAL password modify U.ADMIN, the
owning
U.NORMAL.
TSF Data not owned by a U.NORMAL
Key Operator password modify U.Admin (Key
Operator)
SA password modify U.ADMIN
Data on use of password entered from
MFD control panel in user
authentication
query, modify U.ADMIN
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Data on minimum user password
length
query, modify U.ADMIN
Data on Private Charge Print query, modify U.ADMIN
Data on access denial due to
authentication failure
query, modify U.ADMIN
Data on Customer Engineer operation
restriction
query, modify U.ADMIN
Data on date and time query, modify U.ADMIN
Data on Auto Clear query, modify U.ADMIN
Data on Report Print query, modify U.ADMIN
Software, firmware, and related configuration data
Controller ROM modify U.ADMIN
FMT_SMF.1 Specification of Management Functions
(for O.USER_AUTHORIZATION, O.ACCESS_CONTROL,
and O.ADMIN_ROLES)
Hierarchical to: No other components.
Dependencies: No dependencies.
FMT_SMF.1.1 The TSF shall be capable of performing the following
management functions: [assignment: Security
Management Functions listed in Table 17].
Table 17 Security Management Functions
Management Functions Operation
Registration of U.NORMAL/SA query, modify, delete
creation
Data on user authentication query, modify
Key Operator identifier modify
Key Operator password modify
Data on use of password entered from MFD
control panel in user authentication
query, modify
Data on Private Charge Print query, modify
Data on trusted communications query, modify
Data on date and time query, modify
Data on auditing query, modify
Data on storage data encryption query, modify
Data on Overwrite Storage query, modify
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Data on Customer Engineer operation
restriction
query, modify
Data on Self Test query, modify
Data on access denial due to authentication
failure
query, modify
Data on minimum user password length query, modify
Data on Auto Clear query, modify
Data on firmware update query, modify
Data on Report Print query, modify
Controller ROM modify
FMT_SMR.1 Security roles
(for O.ACCESS_CONTROL, O.USER_AUTHORIZATION, and
O.ADMIN_ROLES)
Hierarchical to: No other components.
Dependencies: FIA_UID.1 Timing of identification
FMT_SMR.1.1 Refinement: The TSF shall maintain the roles U.ADMIN
(U.ADMIN, SA, Key Operator), U.NORMAL.
FMT_SMR.1.2 The TSF shall be able to associate users with roles.
Class FPT: Protection of the TSF
FPT_KYP_EXT.1 Protection of Key and Key Material
(for O.KEY_MATERIAL)
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_KYP_EXT.1.1 Refinement: The TSF shall not store plaintext keys that are part
of the keychain specified by FCS_KYC_EXT.1 in any Field-
Replaceable Nonvolatile Storage Device.
FPT_SKP_EXT.1 Protection of TSF Data
(for O.COMMS PROTECTION)
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_SKP_EXT.1.1 The TSF shall prevent reading of all pre-shared keys, symmetric
keys, and private keys.
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FPT_STM.1 Reliable time stamps
(for O.AUDIT)
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_STM.1.1 The TSF shall be able to provide reliable time stamps.
FPT_TST_EXT.1 TSF testing
(for O.TSF_SELF_TEST)
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_TST_EXT.1.1 The TSF shall run a suite of self-tests during initial start-up (and
power on) to demonstrate the correct operation of the TSF.
FPT_TUD_EXT.1 Trusted Update
(for O.UPDATE_VERIFICATION)
Hierarchical to: No other components.
Dependencies: FCS_COP.1(b) Cryptographic Operation (for signature
generation/verification),
FCS_COP.1(c) Cryptographic operation (Hash Algorithm).
FPT_TUD_EXT.1.1 The TSF shall provide authorized administrators the ability to
query the current version of the TOE firmware/software.
FPT_TUD_EXT.1.2 The TSF shall provide authorized administrators the ability to
initiate updates to TOE firmware/software.
FPT_TUD_EXT.1.3 The TSF shall provide a means to verify firmware/software
updates to the TOE using a digital signature mechanism and
[selection: published hash, no other functions] prior to
installing those updates.
Class FTA: TOE Access
FTA_SSL.3 TSF-initiated termination
(for O.USER_I&A)
Hierarchical to: No other components.
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Dependencies: No dependencies.
FTA_SSL.3.1 The TSF shall terminate an interactive session after a
[assignment:
Auto Clear time for the control panel: 10 to 900 seconds
Login timeout for the Web UI: one to 240 minutes
There is no inactive time with printer driver
].
Class FTP: Trusted Paths/Channels
FTP_ITC.1 Inter-TSF trusted channel
(for O.COMMS_PROTECTION, O.AUDIT)
Hierarchical to: No other components.
Dependencies: [FCS_IPSEC_EXT.1 Extended: IPsec selected, or FCS_TLS_EXT.1
Extended: TLS selected, or FCS_SSH_EXT.1 Extended: SSH
selected, or FCS_HTTPS_EXT.1 Extended: HTTPS selected].
FTP_ITC.1.1 Refinement: The TSF shall use [selection: IPsec, SSH, TLS,
TLS/HTTPS] to provide a trusted communication channel
between itself and authorized IT entities supporting the
following capabilities: [selection: authentication server,
[assignment: Audit Log Server, Mail Server]] that is logically
distinct from other communication channels and provides
assured identification of its end points and protection of the
channel data from disclosure and detection of modification of
the channel data.
FTP_ITC.1.2 Refinement: The TSF shall permit the TSF, or the authorized IT
entities, to initiate communication via the trusted channel
FTP_ITC.1.3 Refinement: The TSF shall initiate communication via the
trusted channel for [assignment: mail service, and audit
transmission service].
FTP_TRP.1(a) Trusted path (for Administrators)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: [FCS_IPSEC_EXT.1 Extended: IPsec selected, or
FCS_TLS_EXT.1 Extended: TLS selected, or
FCS_SSH_EXT.1 Extended: SSH selected, or
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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FCS_HTTPS_EXT.1 Extended: HTTPS selected].
FTP_TRP.1.1(a) Refinement: The TSF shall use [selection, choose at least one
of: IPsec, SSH, TLS, TLS/HTTPS] to provide a trusted
communication path between itself and remote administrators
that is logically distinct from other communication paths and
provides assured identification of its end points and protection
of the communicated data from disclosure and detection of
modification of the communicated data.
FTP_TRP.1.2(a) Refinement: The TSF shall permit remote administrators to
initiate communication via the trusted path
FTP_TRP.1.3(a) Refinement: The TSF shall require the use of the trusted path for
initial administrator authentication and all remote
administration actions.
FTP_TRP.1(b) Trusted path (for Non-administrators)
(for O.COMMS_PROTECTION)
Hierarchical to: No other components.
Dependencies: [FCS_IPSEC_EXT.1 Extended: IPsec selected, or
FCS_TLS_EXT.1 Extended: TLS selected, or
FCS_SSH_EXT.1 Extended: SSH selected, or
FCS_HTTPS_EXT.1 Extended: HTTPS selected].
FTP_TRP.1.1(b) Refinement : The TSF shall use [selection, choose at least one
of: IPsec, SSH, TLS, TLS/HTTPS] to provide a trusted
communication path between itself and remote users that is
logically distinct from other communication paths and provides
assured identification of its end points and protection of the
communicated data from disclosure and detection of
modification of the communicated data.
FTP_TRP.1.2(b) Refinement: The TSF shall permit [selection: the TSF, remote
users] to initiate communication via the trusted path
FTP_TRP.1.3(b) Refinement: The TSF shall require the use of the trusted path for
initial user authentication and all remote user actions.
Fuji Xerox VII C4422/C4421/C3322/C3321 Security Target
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6.3. Security Assurance Requirements
The requirements for the TOE security assurance are described in Table 18.
Table 18 Security Assurance Requirements
Assurance Class
Assurance
Components
Assurance
Components
Description
Security Target
Evaluation
ASE_CCL.1 Conformance claims
ASE_ECD.1 Extended components
definition
ASE_INT.1 ST introduction
ASE_OBJ.1 Security objectives for the
operational environment
ASE_REQ.1 Stated security requirements
ASE_SPD.1 Security Problem Definition
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_IND.1
Independent testing –
Conformance
Vulnerability
assessment
AVA_VAN.1 Vulnerability survey
The rationale for choosing these security assurance requirements is that they define a minimum security
baseline that is based on the anticipated threat level of the attacker, the security of the Operational
Environment in which the TOE is deployed, and the relative value of the TOE itself.
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6.4. Security Requirement Rationale
Dependencies of Security Functional Requirements
Table 19 describes the functional requirements that security functional requirements depend on
and those that do not and the reason why it is not problematic even if dependencies are not
satisfied.
Table 19 Dependencies of Functional Security Requirements
Functional
Requirements
Dependencies of Functional Requirements
Requirement and its
name
Requirement
specified in PP
Un-fulfilled
requirement
and its
rationale
Fulfil
ment
FAU_GEN.1
Audit data generation
FPT_STM.1 - OK
FAU_GEN.2
User identity association
FAU_GEN.1
FIA_UID.1
- OK
FAU_STG_EXT.1
Extended: External audit trail
storage
FAU_GEN.1
FTP_ITC.1
- OK
FCS_CKM.1(a)
Cryptographic key generation
(asymmetric keys)
[FCS_COP.1(b), or
FCS_COP.1(i)]
FCS_CKM_EXT.4
- OK
FAU_SAR.1
Audit review
FAU_GEN.1 - OK
FAU_SAR.2
Restricted audit review
FAU_SAR.1 - OK
FAU_STG.1
Protected audit trail storage
FAU_GEN.1 - OK
FAU_STG.4
Prevention of audit data loss
FAU_STG.1 - OK
FCS_CKM.1(b)
Cryptographic key generation
(symmetric keys)
[FCS_COP.1(a), or
FCS_COP.1(d), or
FCS_COP.1(e), or
FCS_COP.1(f), or
FCS_COP.1(g), or
FCS_COP.1(h)]
FCS_CKM_EXT.4
FCS_RBG_EXT.1
- OK
FCS_CKM.4
Cryptographic key destruction
[FCS_CKM.1(a), or
FCS_CKM.1(b)]
- OK
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Functional
Requirements
Dependencies of Functional Requirements
Requirement and its
name
Requirement
specified in PP
Un-fulfilled
requirement
and its
rationale
Fulfil
ment
FCS_CKM_EXT.4
Extended: Cryptographic key
material destruction
[FCS_CKM.1(a), or
FCS_CKM.1(b)]
FCS_CKM.4
- OK
FCS_COP.1(a)
Cryptographic operation
(symmetric
encryption/decryption)
FCS_CKM.1(b)
FCS_CKM_EXT.4
- OK
FCS_COP.1(b)
Cryptographic operation
(signature
generation/verification)
FCS_CKM.1(a)
FCS_CKM_EXT.4
- OK
FCS_COP.1(c)
Cryptographic operation (hash
algorithm)
None - OK
FCS_COP.1(d)
Cryptographic operation (AES
data encryption/decryption)
CS_CKM.1(b)
FCS_CKM_EXT.4
- OK
FCS_COP.1(f)
Cryptographic operation (key
encryption)
CS_CKM.1(b)
FCS_CKM_EXT.4
- OK
FCS_COP.1(g)
Cryptographic operation (for
keyed-hash message
authentication)
CS_CKM.1(b)
FCS_CKM_EXT.4
- OK
FCS_HTTPS_EXT.1
Extended: HTTPS selected
FCS_TLS_EXT.1 - OK
FCS_KYC_EXT.1
Extended: Key chaining
[FCS_COP.1(e), or
FCS_SMC_EXT.1, or
FCS_COP.1(i), or
FCS_KDF_EXT.1, and/or
FCS_COP.1(f)]
- OK
FCS_RBG_EXT.1
Extended: Cryptographic
operation (random bit
generation)
None -
FCS_TLS_EXT.1
Extended: TLS selected
FCS_CKM.1(a)
FCS_COP.1(a)
- OK
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Functional
Requirements
Dependencies of Functional Requirements
Requirement and its
name
Requirement
specified in PP
Un-fulfilled
requirement
and its
rationale
Fulfil
ment
FCS_COP.1(b)
FCS_COP.1(c)
FCS_COP.1(g)
FCS_RBG_EXT.1
FDP_ACC.1
Subset access control
FDP_ACF.1 - OK
FDP_ACF.1
Security attribute-based access
control
FDP_ACC.1
FMT_MSA.3
- OK
FDP_DSK_EXT.1
Extended: Protection of data
on disk
FCS_COP.1(d) - OK
FDP_FXS_EXT.1
Extended: Fax separation
None -
FDP_RIP.1(a)
Subset residual information
protection
None -
FIA_AFL.1
Authentication failure handling
FIA_UAU.1 - OK
FIA_ATD.1
User attribute definition
None -
FIA_PMG_EXT.1
Extended: Password
management
None -
FIA_UAU.1
Timing of authentication
FIA_UID.1 - OK
FIA_UAU.7
Protected authentication
feedback
FIA_UAU.1 - OK
FIA_UID.1
Timing of authentication
None -
FIA_USB.1
User-subject binding
FIA_ATD.1 - OK
FMT_MOF.1
Management of security
functions behavior
FMT_SMF.1
FMT_SMR.1
- OK
FMT_MSA.1 FDP_ACC.1 - OK
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Functional
Requirements
Dependencies of Functional Requirements
Requirement and its
name
Requirement
specified in PP
Un-fulfilled
requirement
and its
rationale
Fulfil
ment
Management of security
attributes
FMT_SMF.1
FMT_SMR.1
FMT_MSA.3
Static attribute initialization
FMT_MSA.1
FMT_SMR.1
- OK
FMT_MTD.1
Management of TSF data
FMT_SMF.1
FMT_SMR.1
- OK
FMT_SMF.1
Specification of management
functions
None -
FMT_SMR.1
Security roles
FIA_UID.1 - OK
FPT_KYP_EXT.1
Extended: Protection of key
and key material
None -
FPT_SKP_EXT.1
Extended: Protection of TSF
data
None -
FPT_STM.1
Reliable time stamps
None -
FPT_TST_EXT.1
Extended: TSF testing
None -
FPT_TUD_EXT.1
Extended: Trusted update
FCS_COP.1(b)
FCS_COP.1(c)
- OK
FTA_SSL.3
TSF-initiated termination
None -
FTP_ITC.1
Inter-TSF trusted channel
[FCS_IPSEC_EXT.1, or
FCS_TLS_EXT.1, or
FCS_SSH_EXT.1, or
FCS_HTTPS_EXT.1]
- OK
FTP_TRP.1(a)
Trusted path (for
administrators)
[FCS_IPSEC_EXT.1, or
FCS_TLS_EXT.1, or
FCS_SSH_EXT.1, or
FCS_HTTPS_EXT.1]
- OK
FTP_TRP.1(b)
Trusted path (for non-
administrators)
[FCS_IPSEC_EXT.1, or
FCS_TLS_EXT.1, or
FCS_SSH_EXT.1, or
FCS_HTTPS_EXT.1]
- OK
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Security Assurance Requirements Rationale
The rationale for choosing these security assurance requirements is that they define a minimum
security baseline that is based on the anticipated threat level of the attacker, the security of the
Operational Environment in which the TOE is deployed, and the relative value of the TOE itself. The
assurance activities throughout the ST are used to provide tailored guidance on the specific
expectations for completing the security assurance requirements.
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7. TOE Summary Specification
This chapter describes the summary specifications of the security functions provided by the TOE.
7.1. Security Functions
Table 20 shows security functional requirements and the corresponding TOE security functions.
The security functions described in this section satisfy the TOE security functional requirements specified
in section 6.1 of this ST.
Table 20 Security Functional Requirements and the Corresponding TOE Security Functions
Security functions
Identification
and
authentication
Security
audit
Access
control
Security
management
Trusted
operation
Data
encryption
Trusted
communications
PSTN
Fax-Network
Separation
Overwrite
Storage
SFRs
FAU_GEN.1 
FAU_GEN.2 
FAU_STG_EXT.1 
FAU_SAR.1 
FAU_SAR.2 
FAU_STG.1 
FAU_STG.4 
FCS_CKM.1(a) 
FCS_CKM.1(b) 
FCS_CKM.4 
FCS_CKM_EXT.4 
FCS_COP.1(a) 
FCS_COP.1(b1) 
FCS_COP.1(b2) 
FCS_COP.1(c1) 
FCS_COP.1(c2) 
FCS_COP.1(d) 
FCS_COP.1(f) 
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Security functions
Identification
and
authentication
Security
audit
Access
control
Security
management
Trusted
operation
Data
encryption
Trusted
communications
PSTN
Fax-Network
Separation
Overwrite
Storage
SFRs
FCS_COP.1(g) 
FCS_HTTPS_EXT.1 
FCS_KYC_EXT.1 
FCS_RBG_EXT.1  
FCS_TLS_EXT.1 
FDP_ACC.1 
FDP_ACF.1 
FDP_DSK_EXT.1 
FDP_FXS_EXT.1 
FDP_RIP.1(a) 
FIA_AFL.1 
FIA_ATD.1 
FIA_PMG_EXT.1 
FIA_UAU.1 
FIA_UAU.7 
FIA_UID.1 
FIA_USB.1 
FMT_MOF.1 
FMT_MSA.1 
FMT_MSA.3 
FMT_MTD.1  
FMT_SMF.1  
FMT_SMR.1 
FPT_KYP_EXT.1 
FPT_SKP_EXT.1 
FPT_STM.1 
FPT_TST_EXT.1 
FPT_TUD_EXT.1 
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Security functions
Identification
and
authentication
Security
audit
Access
control
Security
management
Trusted
operation
Data
encryption
Trusted
communications
PSTN
Fax-Network
Separation
Overwrite
Storage
SFRs
FTA_SSL.3 
FTP_ITC.1 
FTP_TRP.1(a) 
FTP_TRP.1(b) 
Identification and Authentication
The identification and authentication function is the function to identify and authenticate a user
by having the user enter a user ID and password from the control panel, CWIS and printer driver of
the user client so that only certain authorized users are granted permissions to use the functions of
the MFD.
User information registered in the MFD is used for identification and authentication.
(1) FIA_AFL.1 Authentication failure handling
The TOE authenticates users before they access the TOE. The TOE has the function to
handle authentication failures when a user attempts to be authenticated. This function
detects failed local authentication attempts made by the user. When the number of
consecutive failed authentication attempts of the user reaches 5, which is set as the
maximum allowable number of failures, the TOE does not accept an identification and
authentication request of the user until the TOE is turned off and on again.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
Printer driver
External audit server
(2) FIA_ATD.1 User attribute definition
FIA_USB.1 User-subject binding
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The TOE defines a user ID and a role as attributes for each user and assign the attributes
to an identified and authenticated user.
【TSFI related to FIA_ATD.1】
Management functions of control panel
Management functions of CWIS
【TSFI related to FIA_USB.1】
Identification and authentication of control panel
Identification and authentication of CWIS
External audit server
(3) FIA_PMG_EXT.1 Password Management
In the TOE, when a Key Operator’s password is changed and when the password of a user
authenticated by local authentication is newly created or changed, it is possible to create
a password by combining the following characters.
Characters that can be used for a password:
Upper- and lower-case letters, numbers, and the following special characters:
“!”, “@”, “#”, “$”, “%”, “^”, “&”, “*”, “(”, “)”, “(space)”, “””, “’”, “+”, “,”, “-“, “/”, “:”, “;”, “<”, “=”,
“>”, “?”, “[”, “¥”, “]”, “_”, “`”, “{“, “|”, “}”, “~”
A system administrator can set the required minimum length of the password to a
number between 0 to 63. Based on this setting, the TOE can set a lower limit of the
password length to 15.
【Related TSFI】
Management functions of control panel
Management functions of CWIS
(4) FIA_UAU.1 Timing of authentication
FIA_UID.1 Timing of identification
The TOE supports local authentication as the user identification and authentication
method.
There are four types of interfaces that require user identification and authentication: the
control panel, web browser of the user client, printer driver, and audit server.
The TOE prompts a user to enter his/her ID and password via a web browser of the user
client or the control panel before permitting him/her to operate the MFD function. The
entered user ID and password are verified against the user data registered in the TOE.
The audit server prepares a PowerShell script in which system administrators’ IDs and
passwords are written, and the script is executed on the audit server. Executing the script
sends the IDs and passwords from the audit server to the TOE via https, and the TOE
performs identification and authentication using the received IDs and passwords.
When Private Print is performed, identification and authentication are performed based
on the ID and password assigned to the print data sent from the client computer.
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The identification (FIA_UID.1) and authentication (FIA_UAU.1) are simultaneously
performed, and the operation on the TOE is allowed only when both identification and
authentication succeed.
When receiving fax data via the public telephone line, the TOE receives the fax data
without user identification and authentication.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
Printer driver
External audit server
Public phone line
(5) FIA_UAU.7 Protected authentication feedback
The TOE provides the function to display the same number of bullets (●) as the password
characters entered on the control panel or web browser in order to hide the password at
the time of user authentication.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
(6) FTA_SSL.3 TSF-initiated termination
The TOE clears the login information (authentication session) and prompts a user to re-
authenticate if CWIS has not been accessed from a web browser for a specified period of
time (settable from one to 240 mins).
In addition, when there is no operation from the control panel for a specified period of
time (the settable time ranges from 10 to 900 seconds), the setting on the control panel
is cleared and the screen returns to the authentication screen.
The session with the printer driver is not retained. The session ends immediately after a
print request is processed.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
Security Audit
The security audit function offers a means to track and log the activities of all TOE users (when
and who carried out which actions) and important events (device failure, configuration change,
user operation, etc.) according to the Security Audit Log setting configured by a system
administrator in system administrator mode.
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(1) FAU_GEN.1 Audit data generation
FAU_GEN.2 User identity association
The TOE records auditable events shown in Table 21, such as job completion, failed user
identification and authentication attempts, and use of security management functions
by identified and authenticated users, in the audit log. The date and time when the event
occurred, the type of the event, the user who caused the event (if known), and the result
of the event are recorded in the audit data of each event.
When the TOE records a defined auditable event in the audit log file, the TOE associates
the event with the identification information of the user who caused the event.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
Printer driver
Management functions of control panel
Management functions of CWIS
Power button
Copy, print, scan, fax, scanned document storage to Mailbox, and document retrieval
functions of control panel
Job management and log display functions of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
Public phone line
Table 21 Details of Security Audit Log
Auditable Events Names of auditable events to be
logged
Description
Start-up and
shutdown of the
audit functions
System Status/ Started normally
(cold boot),
System Status/ Started normally
(warm boot),
Shutdown requested
Job completion Job Status/ Completed,
Job Status/ Canceled by User
Print
Copy
Scan
Fax
Mailbox
[“Mailbox” means a
storage and retrieval job.]
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Unsuccessful User
authentication
Unsuccessful User
identification
(control panel, CWIS,
and audit server)
Login/ Failed
(Invalid UserID),
Login/ Failed
(Invalid Password)
Unsuccessful User
authentication
Unsuccessful User
identification
(printer driver)
Job Status/ Print /Aborted
Use of management
functions
Device Settings/ View Security
Setting
Device Settings/ Change Security
Setting
Device Settings/ Switch
Authentication Mode
Device Settings/ Edit User
[“ID”, “Password”, and “Name” are
recorded as modified attributes.]
Device Settings/ Add User
Device Settings/ Delete User
Device Config/ Software
Audit Policy/ Audit Log/ Enable,
Audit Policy/ Audit Log/ Disable
Modification to the
group of Users that
are part of a role
Device Settings/ Edit User
[When “Role” attribute is modified,
the modification is recorded.]
Changes to the time Device Settings / Adjust Time
Failure to establish
session (TLS)
Communication / Trusted
Communication
Failed [Protocol,
destination and the reason
of failure are recorded]
(2) FAU_SAR.1 Audit review
After logging in to the CWIS, the system administrator can read all the information
recorded in the security audit log data by using the CWIS.
Security audit log data is downloaded as a tab-delimited text file. When downloading the
security audit log data, TLS communication must be enabled.
【Related TSFI】
Management functions of CWIS
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(3) FAU_SAR.2 Restricted audit review
The function to read the security audit log data is restricted to the authenticated system
administrator. Also, the security audit log data can be accessed only from the web
browser and can not be accessed from the control panel.
【Related TSFI】
Management functions of CWIS
(4) FAU_STG.1 Protected audit trail storage
Access to the security audit log data is for reading only, there is no delete or modify
function. This protects the security audit log data from unauthenticated deletion and
modification.
【Related TSFI】
Management functions of CWIS
(5) FAU_STG.4 Prevention of audit data loss
The audit log target events are stored in the storage device in the TOE internally. The
storage device can store up to 15,000 events. When the security audit log data becomes
full, the oldest recorded audit data is overwritten and new audit data is recorded without
loss.
【Related TSFI】
Identification and authentication of control panel
Identification and authentication of CWIS
Printer driver
Management functions of control panel
Management functions of CWIS
Power button
Copy, print, scan, scanned document storage to Mailbox, fax, and document retrieval
functions of control panel
Job management and log display functions of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
Public phone line
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(6) FAU_STG_EXT.1 Extended: External Audit Trail Storage
The security audit log data is sent to an external audit server as a tab-delimited text file
by the request from the server. When an external audit server requests the TOE to send
the security audit log data, the TOE sends all stored data to the server. When sending to
an external audit server, the data is encrypted with TLS/HTTPS.
Only authenticated system administrators can retrieve security audit log data.
The maximum number of audit log target events temporarily stored in the TOE internally
and the behavior when the events exceed the maximum number are described in (5)
FAU_STG.4.
【Related TSFI】
External audit server
(7) FPT_STM.1 Reliable time stamps
The TOE provides the function to issue the time stamp using TOE’s clock function when
the defined auditable event is recorded in the audit log file.
As specified in FMT_MTD.1, only system administrators can change the clock setting.
【Related TSFI】
Follow the related TSFI of FAU_GEN.1, FAU_GEN.2
Access Control
Only the authenticated and identified user can use the following functions. Available functions
depend on the interface that accesses the TSF.
a) Functions controlled by the MFD control panel
Copy, fax (send), scan, document storage and retrieval, print (This print function requires
the Accounting System preset on printer driver. A user must be authenticated on the
control panel.), device condition display, job status and log display, and referring to /
changing the TOE setting data (system administrators only)
b) Functions controlled by CWIS
Device condition display, job status and log display, function to retrieve document data
from Mailbox, and referring to / changing the TOE setting data (system administrators
only), and firmware update function (only system administrator)
c) Functions that use the printer driver of the user client
When a user sends a print request from the printer driver of the user’s client in which the
Accounting System is preset, the MFD decomposes the received data into bitmap data
and stores the data in the internal repository as private print according to the user ID if
the identification and authentication are successful.
(1) FDP_ACC.1 Subset access control
FDP_ACF.1 Security attribute based access control
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The TOE controls access to the jobs and document data of each basic function in
accordance with Tables 12 and 13. For the notes in brackets at the ends of the following
sentences, refer to the notes of Tables 12 and 13.
The user who started each function is assigned as the owner of the job and document
data of the function and only the owner or system administrators can access the job and
document data. However, only system administrators can access the data of a fax that is
being received and the data that is being transmitted from the client computer.
Regarding the print function, a user ID, which will be used to identify the user of the
function, is included in the print data sent by the client computer. The owner of the print
job is identified with the user ID (note 1).
Regarding scan, copy, and fax send functions’ jobs, the user associated with the user ID
that is used to log in on the control panel is assigned as the job owner (note 2).
Regarding fax jobs that are in progress, system administrators are assigned as the job
owners because the user who started the fax send feature cannot be identified. (note 3)
Regarding the stored data of a received fax, the user ID associated with the Mailbox that
stores the data is assigned as the owner (note 3).
Because Jobs and data of received faxes are sent from outside of the TOE, no TOE user
can create jobs or data of received faxes. (note 4)
The document storage and retrieval function enable the function to store/retrieve
scanned documents or fax received documents to/from the Mailbox. Regarding the scan
function, the user must be logged in beforehand. When a user stores scanned documents
in a Mailbox, the Key Operator can select a Mailbox from all Mailboxes, while a general
user and SA can only select the user’s own Mailbox. After selecting the Mailbox to store
scanned documents, the user scans the documents. The user who owns the selected
Mailbox becomes the owner of the scanned documents (note 1). Only the owner of the
data stored in the Mailbox or the Key Operator can retrieve, print (and select the number
of copies and the paper size) and delete the stored data. Although SAs are included in
system administrators, they cannot access the data in the Mailboxes of other users (note
5). The print, scan, copy, fax send, fax receive, and the document storage and retrieval
functions do not provide the function of editing document data.
The function to modify the scan jobs of scan, fax send, and fax receive are not provided.
【Related TSFI】
Printer driver
Copy, print, scan, scanned document storage to Mailbox, fax and document retrieval
functions of control panel
Function of control panel to display the job status and log
Function of CWIS to display the job status and log
Function of CWIS to retrieve document data from Mailbox
Public phone line
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Security management
(1) FMT_MOF.1 Management of security functions behavior
FMT_MTD.1 Management of TSF data
FMT_SMF.1 Specification of Management Functions
FMT_MSA.1 Management of security attributes
FMT_MSA.3 Static attribute initialization
FMT_SMR.1 Security roles
The TOE provides identified and authenticated system administrators with user interfaces
to refer to and change settings of security management functions shown in Table 22 that
are related to the TOE security functions and to customize detailed settings of each
function.
Identified and authenticated general users can only change their own passwords.
As shown above, the required security management functions are satisfied.
As in Table 12 and Table 13, the TOE sets the ID of the user who started each basic
function as the default value of the ID of the owner of the job and document data of
each function. For details, refer to “7.1.3. Access Control (1) FDP_ACC.1 Subset access
control FDP_ACF.1 Security attribute based access control.”
The TOE associates the roles of the Key Operator, SA, system administrator, and general
user to the legitimate users and maintains the association.
In the TOE, the default value of the user role, which is a security attribute, is the general
user.
【TSFI related to FMT_MOF.1,FMT_MSA.1, andFMT_SMR.1】
Management functions of control panel
Management functions of CWIS
【TSFI related to FMT_MTD.1 andFMT_SMF.1】
Management functions of control panel
Management functions of CWIS
Firmware update function of CWIS
【TSFI related to FMT_MSA.3】
Printer driver
Management functions of control panel
Management functions of CWIS
Copy, scan, and scanned document storage to Mailbox, and fax functions of control panel
Public phone line
Table 22 Security management functions and their operationable UIs
Security management item Control panel CWIS
Refer to the setting of Overwrite Storage, enable/disable it, and
set the number of passes (overwrite procedure)
 
Refer to the setting of Storage Data Encryption and
enable/disable it
 -
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Refer to the setting of the use of password entered from MFD
control panel in user authentication and enable/disable it
 -
Refer to the setting of access denial due to authentication
failure of the user, enable/disable it, and set the allowable
number of failures
 
Set the ID and the password of the Key Operator (Only the Key
Operator is privileged.)
 
Refer to the setting of the ID of a user and change the ID and
password
Refer to the assigned role of the user and set SA or general user
as the role
 
Refer to and set the minimum password length  
Refer to the setting of communication data encryption,
enable/disable it, and configured the detailed settings.
 
Refer to the setting of TLS certificate and create/update the
certificate
- 
Refer to the setting of User Authentication and enable/disable
Local Authentication
 
Refer to the setting of PrivatePrint and configure the settings of
store/print
 -
Refer to and set date and time  -
Refer to the setting of Self Test and enable/disable it  
Refer to the setting of firmware update and enable/disable it  
Refer to and set Auto Clear of Control Panel and CWIS  
Refer to the setting of Report Print and select whether to allow
only the system administrators / all users to use the function
 -
Refer to and configure the setting of Customer Engineer
Operation Restriction (enable/disable the function and set
password for maintenance)
 
Refer to the setting of the security audit function and
enable/disable it (When enabled, the security audit log data
can be sent to the audit server as a tab-separated text file.)
- 
(2) FPT_SKP_EXT.1 Protection of TSF Data
The TOE stores a KEK (Key Encryption Key) in plaintext in NVRAM2, but the TOE does not
provide an interface to read the KEK to any users. The circuit board which NVRAM2 is
soldered to is not for storage.
A DEK (Data Encryption Key) is encrypted with KEK in AES-CBC and is stored in NVRAM1
and HDD. The one in HDD is a backup.
When the TOE is turned on, the encrypted DEK stored in NVRAM1 is decrypted with a KEK
stored in NVRAM2. While the TOE is in operation, the DEK is stored in DRAM in plaintext.
The TOE does not provide an interface to read the plaintext DEK stored in DRAM to any
users. The plaintext DEK stored in DRAM is destroyed when the TOE is turned off.
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Certificates with secret keys used for TLS communications, etc. are encrypted with the
mechanism described in 7.1.6 (15) and stored in the NVRAM1. The interface to read the
secret keys is not provided to any users.
The TLS session key and TLS EC Diffie-Hellman secret key used for communication are
stored in the DRAM in plaintext, but the interface to read the plaintext session keys
stored in the DRAM is not provided to any users. The plaintext session key is destroyed
when the TOE is turned off.
【Related TSFI】
None
Trusted Operation
(1) FPT_TST_EXT.1 TSF testing
The TSF consists of two firmware: Controller ROM. Verification of the integrity of these
two firmware guarantees the proper operation of the TSF.
When the TOE is turned on, Controller ROM respectively calculate 4 bytes checksums to
verify whether the checksums match the specified value. When an error occurs, an error
message is displayed on the control panel, and the TOE cancels the startup. The TOE
operates health tests described in [1]11.3 on the DRBG. When the test is failed, the TOE
displays an error message on the control panel and cancels the startup. The specifications
of the DRBG is described in 7.1.6.
【Related TSFI】
Power button
(2) FPT_TUD_EXT.1 Trusted Update
FMT_MTD.1 Management of TSF data
FMT_SMF.1 Specification of Management Functions
The system administrators can see the current version of the firmware that configures the
TOE on the control panel by operating it or on paper by printing the configuration report.
Only identified and authenticated system administrators can update the firmware by
sending a binary file that contains Controller ROM to the TOE from the web browser of a
system administrator’s client computer.
When the TOE receives a binary file that contains firmware sent from the web browser of
a system administrator’s client computer, the TOE verifies the digital signature attached
to the binary file. When the verification fails, the update is cancelled, an error message is
displayed ont the control panel, and the TOE stops. The digital signature attached to the
binary file is a RSASSA-PKCS1-v1.5 digital signature that is made by hashing the binary
file with SHA-256 and encrypting the hash value with a 2048-bit secret key. Therefore, in
order to verify the digital signature, 1) decrypt the digital signature attached to the
binary file with the RSA public key for firmware signature verification, 2) hash the binary
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file with SHA-256, and 3) compare the decrypted value and the hash value. When the
two values are the same, verification is successful and if not, verification is failed.
【TSFI related to FPT_TUD_EXT.1】
Function of control panel to confirm the firmware version
Firmware update function of CWIS
【TSFI related to FMT_MTD.1 and FMT_SMF.1】
Management functions of control panel
Management functions of CWIS
Firmware update function of CWIS
Data Encryption
(1) FCS_CKM.1(a) Cryptographic Key Generation (for asymmetric keys)
An elliptic curve key described in [2] is used as the asymmetric key for the key
establishment (EC Diffie-Hellman) in TLS encrypted communication. Methods to
generate an elliptic curve key shall follow [3] 5.6.1.2.2 and [2] Appendix B.4.2. TLS EC
Diffie-Hellman secret key is a random number generated by AES-256 CTR DRBG
described in (14) seeded with values generated by Linux /dev/random. Supported elliptic
curves are P-256, P-384, and P-521 as described in [2] Appendix D, and the elliptic curve
to be used is decided in TLS negotiation.
The TOE uses an elliptic curve key described in [2] or an RSA key described in [4] as the
asymmetric key for the TLS server certificate. These asymmetric keys are generated on
the user request from CWIS. Methods to generate an elliptic curve key shall follow [3]
5.6.1.2.2 and [2] Appendix B.4.2. Methods to generate an RSA key shall follow [4] 6.3.1.3.
The prime number used in the procedure shall be generated following [2] B.3.3.
Supported elliptic curves are P-256, P-384, and P-521 as described in [2] Appendix D, and
supported RSA key sizes are 2048-bit and 3072-bit. The user selects one and requests to
generate a key on CWIS. AES-256 CTR DRBG described in (14) is used to generate
random probable primes.
The TOE does not make any changes to the above key generation methods and does not
use any other methods.
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
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Firmware update function of CWIS
(2) FCS_CKM.1(b) Cryptographic Key Generation (symmetric keys)
The TOE uses random numbers that consist of arbitrary number of bits for the DEK and
the session keys for trusted communications. Specifically, a 256-bit number for the DEK, a
256-bit number for the KEK to encrypt the DEK, a 128 to 256-bit number (depends on the
encryption method decided in the negotiation) for the master key of TLS session keys are
generated. For random number generation, AES-256 CTR DRBG described in (14) is used.
The DRBG is called when the key chain described in (12) is generated and when the TLS
communication session starts.
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Power button
Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(3) FCS_CKM.4 Cryptographic key destruction
FCS_CKM_EXT.4 Cryptographic Key Material Destruction
The TOE destroys plaintext keys and key materials when they are no longer needed (*).
Table 23 shows keys and key materials that are stored in the TOE in plaintext and how
they are destroyed. The values of these keys and materials are copied to the working
memory of RAM and used when an encryption is performed. The copied data on RAM is
deleted when the TOE is turned off because it is no longer needed.
(*) The DEK is stored in NVRAM1 and HDD, but it is not destroyed because it is encrypted
as described in (10). The asymmetric key for TLS server certificate described in (1) is
stored in the NVRAM1, but it is not destroyed because it is encrypted with the mechanism
described in (15). The public key used for the verification of firmware signature is not
destroyed because it is not classified as any of the following: secret key, private
cryptographic key, or cryptographic critical security parameter.
【Related TSFI】
Management functions of control panel
Power button
Table 23 Methods to destroy keys and key material stored in plaintext
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(4) FCS_COP.1(a) Cryptographic Operation (Symmetric encryption/decryption)
The TOE supports AES-CBC described in [5] and AES-GCM (128-bit and 256-bit) described
in [6] for the symmetric encryption/decryption of TLS. AES follows [7].
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(5) FCS_COP.1(b1) Cryptographic Operation (for signature generation/verification)
The TOE supports RSA digital signature described in [2] for the verification of the
authenticity of the firmware update. The key size is 2048-bit. The format of the signature
follows RSASSA-PKCS1-v1.5 described in [2] 5.5 (f).
【Related TSFI】
Firmware update function of CWIS
(6) FCS_COP.1(b2) Cryptographic Operation (for signature generation/verification)
When verifying the target of TLS communication and digital signature
generation/verification, the TOE generates RSA digital signatures and elliptic curve digital
signatures described in [2] and verifies with them. Supported RSA key sizes are 2048-bit
Key type Storage Destruction method and reason
KEK (Key Encryption
Key)
NVRAM2 Overwritten once with the random value
generated using DRBG described in (14) when
restore to factory settings is requested from the
administrator menu on the control panel.
Restore to factory settings means destroying all
data on the disk and since it is not necessary to
decrypt the target partition with the same
encryption key after destroying the data, DEK
and KEK are not required.
TLS session key RAM
(volatile)
Destroyed when the TOE is turned off.
Since the TOE closes a valid TLS session when it
is powered off, TLS session key and TLS EC
Diffie-Hellman secret key are not needed.
TLS EC Diffie-
Hellman secret key
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and 3072-bit. Supported NIST elliptic curves are P256, P384, and P521. The format of the
RSA digital signature follows RSASSA-PKCS1-v1.5 described in [2] 5.5 (f). The methods of
generation and verification of the elliptic curve digital signature follows [2] 6.4. For these,
the signature methods to be used are determined respectively by negotiation with the
communication partner during TLS communication, and by the user’s specification at the
time of digital signature generation.
【Related TSFI】
Management functions of CWIS
Scan function of control panel
(7) FCS_COP.1(c1) Cryptographic operation (Hash Algorithm)
The TOE uses SHA-256 for the hash calculation of firmware update image data when
verifying the authenticity of the firmware update. The TOE compares the SHA-256 hash
value and the value of the signature decrypted with RSA to verify the signature. The hash
algorithm follows [8].
【Related TSFI】
Firmware update function of CWIS
(8) FCS_COP.1(c2) Cryptographic operation (Hash Algorithm)
The TOE supports SHA1/SHA256/SHA384 for the hash calculation of keyed-hash
message authentication method described in (11). The hash algorithm used for
communication is determined by negotiation with the communication partner. In
addition, the TOE supports SHA256/SHA384/SHA512 for hash calculation for digital
signature generation/verification, and the hash algorithm to be used determined by
user’s specification at the time of signature generation.
The hash calculation of keyed-hash message authentication method in TLS and the hash
calculation of digital signature generation/verification are independent and can be freely
combined.
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(9) FCS_COP.1(d) Cryptographic operation (AES Data Encryption/Decryption)
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The TOE supports AES described in [9] as the encryption method of the storage
encryption and supports CBC described in [10] as the block cipher mode. The key size is
256-bit. The sector number of the storage and the DEK are used to calculate the IV.
【Related TSFI】
Printer Driver
Copy, print, scan, scanned document storage to Mailbox, fax, and document retrieval
functions of control panel
Job status and log display of control panel
Function of CWIS to retrieve document data from Mailbox
Public phone line
(10) FCS_COP.1(f) Cryptographic operation (Key Encryption)
As described in (12), the TOE encrypts DEK (256-bit) using AES described in [9]. The key
size is 256-bit. Supported block cipher mode is CBC described in [10]. IV is a random
number generated by AES-256 CTR DRBG described in (14).
As described in (12), the TOE encrypts DEK (256 bit) when the TOE is turned on for the
first time without DEK chain.
【Related TSFI】
Power button
(11) FCS_COP.1(g) Cryptographic Operation (for keyed-hash message authentication)
The TOE supports the following for the keyed-hash message authentication of TLS.
Key size (bit): 160, 256, and 384
Hash: SHA-1, SHA-256, and SHA-384
Message digest size (bit): 160, 256, and 384
The hash algorithm follows [11], and the keyed-hash message authentication algorithm
(HMAC) follows [12].
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(12) FCS_KYC_EXT.1 Key Chaining
In the TOE, the DEK and the KEK, which encrypts the DEK, are in a key chain. When the
TOE is turned on without DEK chain (more specifically, when the TOE is turned on for the
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first time in the factory, or when the TOE is turned on for the first time after the operation
to restore factory settings is performed from the system administrator menu on the
control panel), the TOE generates the DEK and KEK using DRBG described in (14). The
DEK is encrypted with KEK as described in (10) and stored in NVRAM1 and HDD, and the
KEK is stored in NVRAM2 in plaintext. When the TOE is turned on subsequently, the TOE
decrypts the encrypted DEK stored in NVRAM1 with the KEK retrieved from NVRAM2 as
described in (10). The key size of both DEK and KEK is 256-bit. As described in (14), DRBG
supplies sufficient entropy, so the strength of both DEK and KEK is 256-bit, which means
that the 256-bit strength is maintained in the key chain.
【Related TSFI】
Power button
(13) FPT_KYP_EXT.1 Protection of Key and Key Material
As described in (12), when the TOE is turned on for the first time without DEK chain, the
TOE generates a DEK and a KEK using DRBG described later, stores the DEK encrypted
with KEK in NVRAM1 and HDD, and stores the KEK in NVRAM2 in plaintext. The DEK and
KEK are not stored in other storage. NVRAM2 is not a Field-Replaceable Nonvolatile
Storage Device, so plaintext keys that are part of the keychain specified by (12) is not
stored in any Field-Replaceable Nonvolatile Storage Device.
【Related TSFI】
Power button
(14) FCS_RBG_EXT.1 Cryptographic Operation (Random Bit Generation)
For random number generation, the TOE uses AES-256 CTR DRBG that follows [1]10.2.1.
This DRBG has derivation function and reseed function, but does not have prediction
resistance function. It uses a random number generated by Linux kernel /dev/random as
the seed. Linux Random Number Generator (LRNG), which provides /dev/random, and the
read noise of the clock counter, which is input in LRNG, are included in the entropy pool
of DRBG. The noise is created by a software so that the clock counter reads at random
timings. DRBG uses the seed provided by /dev/random as the entropy input and nonce,
but the amount of entropy is more than 256-bit × 1.5, which is sufficient according to [1]
8.6.7.
The TOE generates the DEK and the master key of TLS session keys using the DRBG.
As described in (12), the DRGB is activated in order to generate the DEK when TOE is
turned on for the first time without DEK chain.
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
Power button
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Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(15) FDP_DSK_EXT.1 Protection of Data on Disk
The TOE encrypts/decrypts each data block in the storage device.
More precisely, for the storage device partition that is to be encrypted, the TOE applies
data decryption/encryption through the read/write operation of a file or metadata, and
reads/writes data blocks from/to that partition.
Encryption method follows FCS_COP.1(d). The storage devices containing the encryption
target partition are NVRAM1 and HDD, both of which are field-replaceable. There are no
field-replaceable devices except for the NVRAM1 and HDD.
After Storage Data Encryption is enabled by the administrator, the encryption/decryption
described above starts to be performed when the TOE is turned on for the first time. As
described in (12), the DEK to be used for encryption/decryption is generated when the
TOE is turned on without an cryptographic key chain.
All plaintext user data and plaintext secret TSF data are encrypted because they are
written in the partitions to be encrypted on the NVRAM1 and HDD. The partitions not to
be encrypted on the NVRAM1 and HDD store only program images, control parameters,
and the DEK encrypted with KEK in the method specified in (10). Plaintext user document
data and plaintext secret TSF data is not stored in those partitions. As described in (12),
the DEK is encrypted when the TOE is turned on without a cryptographic key chain.
NVRAM2, which stores the plaintext KEK, is not a field-replaceable storage device.
【Related TSFI】
Printer driver
Management functions of CWIS
Power button
Copy, print, scan, scanned document storage to Mailbox, fax, and document retrieval
functions of control panel
Job status and log display of control panel
Function of CWIS to retrieve document data from Mailbox
Public phone line
Trusted Communications
(1) FCS_HTTPS_EXT.1 HTTPS selected
There is a setting that forces a secure channel using HTTPS for all communication traffic
of the TOE with the web browser and audit server. Only system administrators can
change this setting, and it is performed on CWIS. The specifications of HTTPS follow [13].
When the TOE receives a request to connect to CWIS from the web browser of a client
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computer, the TOE and the client computer establish the TLS negotiation and start
HTTPS communication. Identification, authentication, and all remote operation on the
TOE through CWIS of the client computer are performed via HTTPS communication.
When the audit server requests to retrieve the security audit log data, the TOE sends the
data to the audit server via HTTPS communication.
【Related TSFI】
Identification and authentication of CWIS
Management functions of CWIS
Function of CWIS to display the JOB status and log
Function to retrieve document data from Mailbox of CWIS
External audit server
Firmware update function of CWIS
(2) FCS_TLS_EXT.1 TLS selected
The supported TLS communication is TLS 1.2 described in [14].
The cipher suite to be used in the TLS communication is negotiated while the client and
server are connected with TLS. In TLS communication, the TOE can be a client or a server
depending on the function in operation. For example, the TOE acts as a server when
accessing CWIS. The TOE acts as a client when sending scanned documents via email.
The TOE selects an appropriate cipher suite that the TOE supports from the cipher suites
suggested by the client. Cipher suites supported by the TOE are as follows:
TLS_RSA_WITH_AES_128_CBC_SHA
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Management functions of CWIS
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Scan function of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
External audit server
Firmware update function of CWIS
(3) FTP_ITC.1 Inter-TSF trusted channel
The TOE supports the following trusted communication protocols for the communication
of the TOE with the audit server and the mail server. This ensures identification of the end
points and protection of the channel data from disclosure and modification.
Audit server: TLS/HTTPS
Mail server: TLS
【Related TSFI】
Scan function of control panel
External audit server
(4) FTP_TRP.1(a) Trusted path (for Administrators)
The TOE supports the following trusted communication protocols for each interface to
access the TOE from the remote computers of system administrators. This ensures
identification of the TOE’s end points and protection of the channel data from disclosure
and modification.
CWIS: TLS/HTTPS
【Related TSFI】
Identification and authentication of CWIS
Management functions of CWIS
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
Firmware update function of CWIS
(5) FTP_TRP.1(b) Trusted path (for Non-administrators)
The TOE supports the following trusted communication protocols for each interface to
access the TOE from the remote computers of non-administrators. This ensures
identification of the TOE’s end points and protection of the channel data from disclosure
and modification.
CWIS: TLS/HTTPS
Printing with the printer driver: TLS
【Related TSFI】
Identification and authentication of CWIS
Printer driver
Function of CWIS to display the JOB status and log
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Function of CWIS to retrieve document data from Mailbox
PSTN Fax-Network Separation
(1) FDP_FXS_EXT.1 Fax separation
The TOE is equipped with a fax modem function, which enables the TOE to send/receive
fax data through the public phone line.
The only supported protocol is ITU-T G3 mode.
Only the fax documents of the user are allowed to be sent/received with the fax interface.
The TOE is not equipped with a data modem function, so external data communication
commands cannot be received, which means the TOE cannot be accessed by
unauthorized means from the fax line. Also, the TOE does not offer the function to deliver
data between the public phone line and the internal network, so the data received
through the public phone line is not sent to the internal network.
【Related TSFI】
Public phone line
Overwrite Storage
(2) FDP_RIP.1(a) Subset residual information protection
When the Overwrite Storage is enabled to be conducted after each job by a system
administrator, the TOE overwrites the used document data stored in the internal HDD
after each job of copy, print, scan, and fax is finished.
The document data used by the document storage function is deleted when an operation
to print, retrieve or delete the data from mailbox is carried out. After that, the TOE
overwrites the data.
Overwrite Storage has two options: one pass overwrite procedure (overwrite with zero)
and three pass overwrite procedure (overwrite with zero / one / random number and
verification). However, when the data encryption function is enabled, the data for
overwrite (zero / one / random number) to be physically written to the storage is
encrypted. A list of used document data to be overwritten and deleted is on the internal
HDD, and the TOE checks the list when it is turned on. If used document data that has
not been deleted is found on the list, Overwrite Storage is performed.
【Related TSFI】
Power button
Copy, Print, Scan, fax, and document data retrieval functions of control panel
Job status and log display of control panel
Function of CWIS to display the JOB status and log
Function of CWIS to retrieve document data from Mailbox
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8. ACRONYMS AND TERMINOLOGY
8.1. Acronyms
The following acronyms are used in this ST:
Acronym Definition
CC Common Criteria
CWIS CentreWare Internet Services
DRAM Dynamic Random Access Memory
FIPS PUB Federal Information Processing Standard publication
IIT Image Input Terminal
MFD Multi Function Device
NVRAM Non Volatile Random Access Memory
PDL Page Description Language
PP Protection Profile
SFP Security Function Policy
SFR Security Functional Requirement
SMTP Simple Mail Transfer Protocol
ST Security Target
TOE Target of Evaluation
TSF TOE Security Function
8.2. Terminology
The following terms are used in this ST:
Term Definition
Destruction Destruction is to delete the target so that the location of the target cannot be
traced from the file system and volatile memory.
KEK Abbreviation of Key Encryption Key. In this ST, KEK is a cryptographic key to
encrypt the DEK.
DEK Abbreviation of Data Encryption Key. In this ST, DEK is a cryptographic key for
storage.
Flash memory SD or eMMC.
Web UI A service that allows users to control the TOE through the web browser of the
user client.
Mailbox A location to store scanned documents, received fax documents.
Computers on the network can retrieve the stored documents from the Mailbox.
Private Print
(Private Charge
Print)
A print function that temporarily stores bitmap data (decomposed print data) in
the storage of the MFD and then print out in accordance with the authenticated
user’s instruction from the control panel.
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Used document
data
The remaining data in the storage of the MFD after deletion. After a document
stored in the storage is used, only its file is deleted, and the data inside remains.
Document data A collective term for all the data, including image data, transmitted across the
MFD when any of copy, print, scan, fax, or document storage functions is used
by a general user (U.NORMAL) or an SA.
Scanned
document
The document data converted into digital format by “Scan” function.
This TOE has the function to send a scanned document to a mailserver and to
store it in the Mailbox by “Document storage and retrieval” function.
Fax received
document
The digital document data received by fax function and handled in this TOE.
With this TOE, the received fax data can be stored in a preset Mailbox by the
setting at the time of installation.
Security audit log
data
The chronologically recorded data of auditable events including important
events of the TOE, such as device failure, configuration change, and user
operation. These events are traced and recorded based on when and who
operated what function.
User role A role assigned to an identified and authenticated user. The TOE defines the Key
Operator role, SA role, and general user role.
Key Operator role The authority required for the Key Operator to use the TOE.
SA role The authority required for an SA to use the TOE.
U.NORMAL role The authority required for a general user (U.NORMAL) to use the TOE.
User identifier Information to identify users. User ID.
Key Operator
identifier
A user ID with the Key Operator role.
Key Operator An authorized user who maintains the MFD and performs settings of the
security functions of the TOE.
SA An authorized user who maintains the MFD and performs settings of the
security functions of the TOE. An SA account is created by the Key Operator or
an SA who is already registered.
U.ADMIN A collective term for Key Operator and SA.
CWIS
(CentreWare
Internet Services)
CWIS is a service that allows the user to access the TOE via the web browser of
the client computer. The user can confirm the status of the TOE, change settings
of the TOE, and request retrieval and printing of documents.
CWIS operates on a standard web browser of Windows.
User
authentication
A function to identify the user before he/she uses each TOE function so that the
TOE can limit the access to the TOE functions.
When the remote authentication option is installed, user authentication
supports two modes (local authentication and remote authentication). The TOE
uses local authentication.
Local
Authentication
A mode to perform user authentication of the TOE using the user information
registered in the MFD.
Remote
Authentication
A mode to perform user authentication of the TOE using the user information
registered in the external authentication server.
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Storage data
encryption
A function to encrypt the storage that stores some of the assets under
protection.
Decompose
function
A function to analyze the data written in PDL and convert the data into bitmap
data.
Decompose
The action of analyzing the data written in PDL and converting the data into
bitmap data by using the decompose function.
System
administrator
mode
An operation mode that enables a system administrator to refer to and rewrite
TOE device operation settings and security function settings in order to adjust
those settings in accordance with the operational environment. System
administrator mode is distinguished from the operation mode that enables a
general user to use the MFD functions.
Auto Clear
A function to automatically log out after a specified period of time passes
without any operations performed on the control panel or CWIS.
Customer
Engineer
Customer service engineer, an engineer who maintains and repairs the MFD.
Attacker
A person who accesses the TOE or protected property by unauthorized means.
Includes users who attempt access by disguising themselves as authenticated
users.
Control panel
A panel on which buttons, lamps, and a touch-screen display, which are
necessary for MFD operations, are arranged.
General user
client
A client for a general user.
System
administrator
client
A client for a system administrator. A system administrator can refer to and
change the TOE setting data of the MFD via web browser.
Printer driver
A software to convert the data on a general user client into print data written in
page description language (PDL), a readable format for MFD. Used on the user
client.
Print data
The data written in PDL, a readable format for MFD. Print data is converted into
bitmap data by the decompose function of the TOE.
Bitmap data
The decomposed data of the data read by the copy function and the print data
transmitted sent by the print function from a user client to MFD. Bitmap data is
stored to the storage after being compressed in a unique process.
Original
document
Texts, images and photos to be read on IIT by the copy function.
TOE setting data
The data created by the TOE or for the TOE and may affect the TOE security
functions. Included in the TSF data.
Cryptographic key
256-bit data which is automatically generated. When document data is stored
to the storage device, it is encrypted with the cryptographic key.
Network A general term to indicate both external and internal networks.
External network
The network which cannot be managed by the organization that manages the
TOE. This does not include the internal network.
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Internal network
Channels between the MFD and the trusted remote servers and client
computers. The channels are located in the network of the organization that
owns the TOE. The network is protected from the security risks coming from the
external network.
Public telephone
line/network
Line/network for sending/receiving fax data.
Fax data Sent/received data in the public telephone line for faxes.
Certificate Defined in ITU-T recommendation X.509. A certificate includes the data for user
authentication (name, distinguished name, organization which the user belongs
to, etc.), public key, expiry date, serial number, signature, etc.
Data on minimum
user password
length
Minimum user password length to set the user password on the MFD control
panel.
Included in the TOE setting data.
Key Operator
password
Password data for Key Operator authentication. Included in the TOE setting
data.
SA password Password data for SA authentication. Included in the TOE setting data.
U.Normal
password
Password data for general user (U.NORMAL) authentication. Included in the TOE
setting data.
Data on access
denial due to
authentication
failures
The data on whether to enable/disable access denial due to authentication
failure. They also incorporate the data on the allowable number of the failures
before access denial. Included in the TOE setting data.
Data on auditing The data on whether to enable/disable the function to trace/record auditable
events including important events of the TOE, such as device failure,
configuration change, and user operation based on when and who operated
what function. Included in the TOE setting data.
Data on user
authentication
The data on whether to enable/disable the authentication function. The
authentication function is performed using the user authentication information
when copy, scan, fax, and print functions of MFD are performed. It also
incorporates the data on the authentication method. Included in the TOE
setting data.
Data on use of
password
entered from MFD
control panel in
user
authentication
The data on whether to enable/disable the use of password when the user
authentication is performed on the control panel. Included in the TOE setting
data.
Data on Private
Charge Print
The setting data on whether to store the received print data to Private Print area
or print it out. Included in the TOE setting data.
Data on trusted
communications
Data on whether the general encrypted communication protocols (TLS/HTTPS
and TLS) are enabled/disabled and their detailed settings and certificate,
authentication passwords, encryption keys, and shared keys to protect
communication data in the internal network such as document data, job
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information, security audit log data, and TOE setting data. Included in the TOE
setting data.
Data on Customer
Engineer
operation
restriction
The data on whether to enable/disable the Customer Engineer Operation
Restriction function and the data on the maintenance password. Included in the
TOE setting data.
Data on Overwrite
Storage
The data on whether to enable/disable the functions related to Overwrite
Storage. Included in the TOE setting data.
Data on storage
data encryption
The data on whether to enable/disable the functions related to storage data
encryption. Included in the TOE setting data.
Data on date and
time
The time zone / summer time information and the present time data. Included
in the TOE setting data.
Data on Auto
Clear
The data on whether to enable/disable the functions of Auto Clear and the
timing to clear on the control panel and CWIS. Included in the TOE setting data.
Data on Self Test The data on whether to enable/disable the Self Test function. Included in the
TOE setting data.
Data on Report
Print
The data on whether to enable/disable the Report Print function. Included in the
TOE setting data.
Data on Firmware
update
The setting data on firmware update functions. Setting data of Firmware
Update. Included in the TOE setting data.
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9. REFERENCES
[1] E. Barker , J. Kelsey, “SP 800-90A Rev.1 Recommendation for Random Number
Generation UsingDeterministic Random Bit Generators,” June 2015.
[2] National Institute of Standards and Technology, “FIPS 186-4 Digital Signature
Standard (DSS),” July 2013.
[3] E. Barker, L. Chen, A. Roginsky, A. Vassilev , R. Davis, “SP 800-56A Rev. 3
Recommendation for Pair-Wise Key-Establishment Schemes Using Discrete
Logarithm Cryptography,” April 2018.
[4] E. Barker, L. Chen, A. Roginsky, A. Vassilev, R. Davis , S. Simon, “SP 800-56B Rev.
2 Recommendation for Pair-Wise Key-Establishment Using Integer Factorization
Cryptography,” March 2019.
[5] M. Dworkin, “SP 800-38A Recommendation for Block Cipher Modes of Operation:
Methods and Techniques,” December 2001.
[6] M. Dworkin, “SP 800-38D Recommendation for Block Cipher Modes of Operation:
Galois/Counter Mode (GCM) and GMAC,” November 2007.
[7] National Institute of Standards and Technology, “FIPS 197 Announcing the
ADVANCED ENCRYPTION STANDARD (AES),” November 2001.
[8] “ISO/IEC 10118-3:2004,” March 2004.
[9] “ISO/IEC 18033-3:2010,” December 2010.
[10] “ISO/IEC 10116:2017,” July 2017.
[11] National Institute of Standards and Technology, “FIPS 180-3 Secure Hash Standard
(SHS),” March 2012.
[12] National Institute of Standards and Technology, “FIPS 198-1 The Keyed-Hash
Message Authentication Code (HMAC),” July 2008.
[13] “RFC2818 HTTP Over TLS,” May 2000.
[14] “RFC5246 The Transport Layer Security (TLS) Protocol Version 1.2,” August 2008.