Issue 1.53 (2018-10-10) i
Copyright © Huawei Technologies Co., Ltd.
CC Security Target Lite
for Huawei OptiX OSN 1800 V V100R006C20
software management component
Issue 1.53
Date 2018-10-10
Issue 1.53 (2018-10-10) ii
Copyright © Huawei Technologies Co., Ltd.
HUAWEI TECHNOLOGIES CO., LTD
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Issue 1.53 (2018-10-10) iii
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OptiX OSN 1800 V V100R006C20
Security Target Lite About This Document
Issue 1.53 (2018-10-10) ii
Copyright © Huawei Technologies Co., Ltd.
About This Document
Purpose
This Security Target is for the evaluation of OptiX OSN 1800 V V100R006C20 software
management component, consisting of unified transmission software (UTS), and underlying
OS. The software is part of OptiX OSN 1800 V.
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
OptiX OSN 1800 V V100R006C20
Security Target Lite Contents
Issue 1.53 (2018-10-10) iii
Copyright © Huawei Technologies Co., Ltd.
Contents
About This Document....................................................................................................................... ii
1 Introduction....................................................................................................................................1
1.1 ST Identification ...........................................................................................................................................................1
1.2 TOE Identification ........................................................................................................................................................1
1.3 Product overview..........................................................................................................................................................2
1.4 TOE Type and TOE Overview......................................................................................................................................4
1.5 TOE Description...........................................................................................................................................................6
1.5.1 Architectural overview of OptiX OSN 1800 V..........................................................................................................6
1.5.2 Scope of Evaluation...................................................................................................................................................7
1.5.3 Summary of Security Features.................................................................................................................................10
2 CC Conformance Claims ...........................................................................................................15
2.1 CC Conformance Claim .............................................................................................................................................15
3 Security Problem Definition.....................................................................................................16
3.1 Asset ...........................................................................................................................................................................16
3.2 Threats ........................................................................................................................................................................16
3.3 Organizational Security Policies.................................................................................................................................17
3.4 Assumptions................................................................................................................................................................17
4 Security Objectives.....................................................................................................................19
4.1 Security Objectives for the TOE.................................................................................................................................19
4.2 Security Objectives for the Operational Environment................................................................................................19
4.3 Rationale for Security Objectives...............................................................................................................................20
5 Extended Components Definition...........................................................................................23
5.1 FCS_RNG Generation of random numbers................................................................................................................23
6 Security Requirements for the TOE ........................................................................................24
6.1 Conventions................................................................................................................................................................24
6.2 Security Functional Requirements..............................................................................................................................24
6.2.1 Security Audit (FAU)...............................................................................................................................................24
6.2.2 Cryptographic Support (FCS)..................................................................................................................................26
6.2.3 User Data Protection (FDP).....................................................................................................................................30
6.2.4 Identification and Authentication (FIA)...................................................................................................................32
OptiX OSN 1800 V V100R006C20
Security Target Lite Contents
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6.2.5 Security Management (FMT) ..................................................................................................................................33
6.2.6 Protection of the TSF (FPT) ....................................................................................................................................35
6.2.7 TOE access (FTA)....................................................................................................................................................35
6.2.8 Trusted Path/Channels (FTP)...................................................................................................................................35
6.3 Security Functional Requirements Rationale..............................................................................................................37
6.3.1 Coverage..................................................................................................................................................................37
6.3.2 Sufficiency...............................................................................................................................................................39
6.3.3 Security Requirements Dependency Rationale........................................................................................................40
6.3.4 Justification for unsupported dependencies .............................................................................................................43
6.4 Security Assurance Requirements...............................................................................................................................44
6.5 Security Assurance Requirements Rationale ..............................................................................................................44
7 TOE Summary Specification ....................................................................................................45
7.1 Authentication.............................................................................................................................................................45
7.2 Authorization ..............................................................................................................................................................47
7.3 Auditing ......................................................................................................................................................................50
7.4 Communication Security ............................................................................................................................................51
7.5 Management Traffic Flow Control .............................................................................................................................54
7.6 Security Management .................................................................................................................................................54
7.7 Time............................................................................................................................................................................56
7.8 Cryptographic functions .............................................................................................................................................57
A Abbreviations, Terminology and References.......................................................................61
A.1 Abbreviations.............................................................................................................................................................61
A.2 Terminology...............................................................................................................................................................62
A.3 References..................................................................................................................................................................62
OptiX OSN 1800 V V100R006C20
Security Target Lite Figures
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Figures
Figure 1-1 Position of the transmission network on the entire communication network.................................. 2
Figure 1-2 Position of the OptiX OSN 1800 V on the entire network.............................................................. 4
Figure 1-3 TOE constitution ............................................................................................................................. 5
Figure 1-4 System architecture of the OptiX OSN 1800 V .............................................................................. 6
Figure 1-5 TOE logical scope ........................................................................................................................... 9
Figure 1-6 The TOE in its operational environment....................................................................................... 10
OptiX OSN 1800 V V100R006C20
Security Target Lite Tables
Issue 1.53 (2018-10-10) vi
Copyright © Huawei Technologies Co., Ltd.
Tables
Table 1-1 Chassis of OptiX OSN 1800 series................................................................................................... 2
Table 1-2 Groups of accounts...........................................................................................................................11
Table 1-3 Classification of ACL...................................................................................................................... 12
Table 1-4 ACL parameters .............................................................................................................................. 13
Table 4-1 Mapping objectives to threats and OSPs......................................................................................... 20
Table 4-2 Mapping objectives for the environment to assumptions................................................................ 22
Table 6-1 AES operating modes supported by the TOE for symmetric de- and encryption ........................... 27
Table 6-2 Mapping SFRs to objectives ........................................................................................................... 37
Table 6-3 SFR sufficiency analysis................................................................................................................. 39
Table 6-4 Dependencies between TOE security functional requirements....................................................... 41
Table 7-1 SFR to TSF mapping....................................................................................................................... 46
Table 7-2 Correspondence of user groups and command levels ..................................................................... 48
Table 7-3 SFR to TSF mapping....................................................................................................................... 48
Table 7-4 SFR to TSF mapping....................................................................................................................... 51
Table 7-5 SFR to TSF mapping....................................................................................................................... 52
Table 7-6 SFR to TSF mapping....................................................................................................................... 54
Table 7-7 SFR to TSF mapping....................................................................................................................... 55
Table 7-8 SFR to TSF mapping....................................................................................................................... 56
Table 7-9 SFR to TSF mapping....................................................................................................................... 58
OptiX OSN 1800 V V100R006C20
Security Target Lite 1 Introduction
Issue 1.53 (2018-10-10) 1
Copyright © Huawei Technologies Co., Ltd.
1 Introduction
This Security Target is for the evaluation of OptiX OSN 1800 V V100R006C20 software
management component, consisting of unified transmission software (UTS), and underlying
OS(Operation System). The software is part of OptiX OSN 1800 V.
1.1 ST Identification
Title: Security Target Lite for Huawei OptiX OSN 1800 V V100R006C20 software
management component
Version: 1.53
Date: 2018-10-10
Developer: Huawei Technologies Co., Ltd.
1.2 TOE Identification
Name: Huawei OptiX OSN 1800 V V100R006C20 software management component
Version: V100R006C20
Developer: Huawei Technologies Co., Ltd.
VRC versions are defined as follows:
 V version is the version of the software or hardware platform that a product bases.
 R version is released for customer at a specific time. It is a collection of features that is
embodied in the form of a product.
 C version is the customized version developed based on the R version to fast meet
customer demands.
The TOE is part of the OptiX OSN 1800 V software which is the software running on the
OptiX OSN 1800 V device. The TOE only consists of the unified transmission software
(UTS), and underlying OS as described in the following chapters and is referred as OptiX
OSN 1800 V software management component in this ST.
OptiX OSN 1800 V V100R006C20
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The OptiX OSN 1800 V device is targeted for metro edge node applications. It supports OTN,
packet, and TDM services and can interconnect existing WDM equipment for the service
extension purpose.
The identifier for chassis hardware used for testing of the software TOE is OptiX OSN 1800V
chassis (see Table 1-1).
Table 1-1 lists the available chassis of OptiX OSN 1800 V.
Table 1-1 Chassis of OptiX OSN 1800 series
Chassis Product Version
OptiX OSN 1800 V V100R006C20
The identifier for the System Control and Communication unit hardware revision used for
testing of the software TOE is TNZ5UXCMS.
1.3 Product overview
Transmission networks (including SDH, and WDM/OTN networks) transparently transmit
client services from one place to another. For example, as shown in Figure 1-1, Ethernet
services are transmitted from LAN switch to SDH equipment, then to OTN equipment, and
finally to core routers for routing. During the transmission, transmission equipment
encapsulates client services into signals of certain rates, performs error control, and monitors
the quality of the signals. To achieve transparent transmission, the transmission equipment
does not process client services transmitted from other equipment.
Figure 1-1 Position of the transmission network on the entire communication network
BRAS
Lanswitch ADSL
modem
OTN
Core Router
Node B
SDH SDH
SDH
Core Router Core Router
Core Router
Node B
ADSL
modem
ADSL
modem
Lanswitch
SDH
SDH
SDH
SDH
OTN
OTN
OTN
Transmission Network
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Located at the transmission layer of a communication network, Huawei transmission
equipment provides large-capacity and high-reliability transparent transmission tunnels, and is
almost invisible to end users. The transmission tunnels are not prone to external attacks, since
the TOE is only the management component and, therefore, its TSF provide no measure of
protecting transmission traffic.
A Metropolitan Area Network is generally a communication network built within a city,
which is divided into three layers:
 the access layer of the metropolitan area network,
 the aggregation layer of the metropolitan area network, and
 the core layer of the metropolitan area network.
The access layer of the metropolitan area network is mainly responsible for the access control
of the services of individual and enterprise users. The aggregation layer of the metropolitan
area network is to converge the massive user traffic and connect the access layer and core
layer of metropolitan area network. The role of the core layer of the metropolitan area
network is to provide the export of the metropolitan area network, connect with all backbone
networks, and connect with the Internet Data Center of the city. Backbone networks are
high-speed networks used to connect multiple regions’ networks such as metropolitan area
networks or other backbone networks.
The OptiX OSN 1800V device is mainly applicable to the access layer of the metropolitan
area network and the aggregation layer of the metropolitan area network, which is responsible
for accessing and converging the services of individual and enterprise users into metropolitan
area networks. Services such as OTN, Packet, and SDH services are processed at the access
layer and then sent to the convergence node on the metro transmission network. In this
manner, the OptiX OSN 1800 V works with the current OptiX WDM equipment to extend the
services to the access layer. On a network with a small capacity, the OptiX OSN 1800 V is
also applicable to the backbone layer.
The OptiX OSN 1800 V uses dense wavelength division multiplexing (DWDM) and coarse
wavelength division multiplexing (CWDM) technologies to groom wavelengths at each node.
The OptiX OSN 1800 V features easy capacity expansion, flexible service access, high
bandwidth utilization, and high reliability.
The OptiX OSN 1800 V can form an MS-OTN network with the OptiX OSN 8800, OptiX
OSN 9800, or OptiX OSN 1800 II. Figure 1-2 shows the position of the OptiX OSN 1800 V
on the entire network.
OptiX OSN 1800 V V100R006C20
Security Target Lite 1 Introduction
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Figure 1-2 Position of the OptiX OSN 1800 V on the entire network
OSN 1800V OSN 9800
OSN 1800V
ODUk/Packet ODUk/Packet
OSN 8800
OSN 9800
OSN 9800
Metro Access Metro Aggregation Core/Backbone
OSN 1800V
OSN 1800V
OSN 1800V
OSN 1800V
OSN 1800V
OSN 1800V
OSN 1800II
1.4 TOE Type and TOE Overview
The OptiX OSN 1800 V device is transmission equipment and is mainly applicable to the
access layer of the metropolitan area network and the aggregation layer of the metropolitan
area network . It is generally deployed in the upstream of wired broadband and mobile carrier
facilities, which consists of software and hardware.
The hardware is composed of cabinet, chassis, power unit, and boards. The cabinet is used to
install chassis and power units. The power unit is used to supply power to the chassis. The
chassis provides the board slot to insert boards.
Boards are the core unit of processing and management in transmission equipment, consisting
of SCC (System Control and Communication) unit and service unit, consisting of OTN line
board, Optical layer board, Packet board, and TDM board etc.
The SCC (System Control and Communication) unit is the center of the system. It
collaborates with the EMS (Element Management System) to centralize control and manage
all service units of the system and implement inter-equipment communication. All service
units are centrally managed and controlled by the SCC unit, in which independent control and
management software is running. The EMS manages OptiX equipment using a GUI interface.
The GUI interface complies with a special management protocol defined by Huawei
exclusively for OptiX equipment.
The OptiX OSN 1800 V software is deployed in the SCC unit and service units, which is
responsible for the system management and control and service transmission.
The TOE type is a transmission software platform, which is part of the OptiX OSN 1800 V
software. It consists of the Unified Transmission Software (UTS) component, which is the
platform software, and the underlying OS for the System Control and Communication unit
(TNZ5UXCMS) as shown in figure 1-3. These components provide the core control and
management services of the device.
OptiX OSN 1800 V V100R006C20
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The non-TOE SW components include system and service attribute management, service
schedule and protect, optical Layer protocol, service warning and performance, and service
control and monitor.
Figure 1-3 TOE constitution
The UTS is responsible for managing and controlling the whole OptiX OSN 1800 V software,
communication, and security features in OptiX OSN 1800 V. The UTS is relying on the
underlying OS. The OS is responsible for processes scheduling management, file system
management, memory management, IPC module (Inter Process communication), and drivers
etc. Because the UTS mainly provides the security feature of the TOE, the aspects evaluated
are the unified transmission software (UTS), and underlying OS of the OptiX OSN 1800 V.
To counter the security threats of OptiX OSN 1800 V, the unified transmission software (UTS)
deployed in SCC unit provides many security measures to mitigate security risks effectively.
The main security features are:
1. Identification and authentication of administrative users
2. Authorization
3. Auditing
4. Communication Security
5. Access Control
6. Cryptographic functions
7. Security functionality management
The detailed description of above security features is in the chap.1.5.
Hardware Platform
OptiX OSN 1800 V
DCN Network
GE/FE
Local maintenance
terminal
remote maintenance
terminal
OS
TOE
UTS
OptiX OSN 1800 V software
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Security Target Lite 1 Introduction
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1.5 TOE Description
This chapter provides an architectural overview of OptiX OSN 1800 V device including a
detailed description of the physical architecture and the software architecture, the definition of
the TOE subject to evaluation and a summary of security functions provided by the TOE.
1.5.1 Architectural overview of OptiX OSN 1800 V
This section will introduce OptiX OSN 1800 V from a physical architectural point of view
and a software architectural point of view.
1.5.1.1 Physical Architecture of OptiX OSN 1800 V
The OptiX OSN 1800 V is transmission equipment and is mainly applicable to the access
layer of the metropolitan area network and the aggregation layer of the metropolitan area
network. Services such as OTN, Packet, and SDH services are processed at the metro access
layer and then sent to the convergence node on the metro transmission network.
The OptiX OSN 1800 V device consists of the hardware and the software.
The hardware is composed of cabinet, chassis, power unit, and boards. The cabinet is used to
install chassis and power units. The power unit is used to supply power to the chassis. The
chassis provides the board slot to insert boards.
Boards are the core unit of processing and management in transmission equipment, consisting
of SCC (System Control and Communication) unit and service unit, consisting of OTN line
board, Optical layer board, Packet board, and TDM board etc.
Figure 1-4 System architecture of the OptiX OSN 1800 V
The service units are responsible for signal amplifying, optical transpondering, optical
multiplexing and demultiplexing, optical add and drop multiplexing etc., in which a board
software is running.
The SCC (System Control and Communication) unit is the center of the system. It
collaborates with the EMS to centralize control and manage all service units of the system and
implement inter-equipment communication. All service units are centrally managed and
OptiX OSN 1800 V V100R006C20
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controlled by the SCC unit, in which independent control and management software is
running.
The OptiX OSN 1800 V software is deployed in the SCC unit and service units. The part of
the OptiX OSN 1800 V software deployed in the SCC unit includes UTS and other service
application components. UTS is a platform software, which is responsible for managing and
controlling the all software units, and is responsible for communication with external
management network entities including EMS (Element Management System), RADIUS
server, SFTP server and syslog server etc., and provide all security features to ensure the
security of the OptiX OSN 1800 V device.
The UTS is relying on the underlying OS. The OS is responsible for processes scheduling
management, file system management, memory management, IPC module (Inter Process
communication), and drivers etc.
1.5.1.2 Software Architecture of OptiX OSN 1800 V
In terms of the software, OptiX OSN 1800 V’s software architecture consists of two logical
planes to support centralized controlling and management and transparent transmission
mechanism:
 Data plane
 Control and management plane
The control and management plane is the core of the entire system. It controls and manages
the system. The control and management unit processes protocols and signals, configures and
maintains the system status, and reports and controls the system status.
The data plane is responsible for high speed processing and non-blocking forwarding of data
packets. It encapsulates or decapsulates packets, transparently transmits them, and collects
statistics.
The unified transmission software (UTS) and the underlying OS are the control and
management core that runs on the SCC unit, which is responsible for managing and
controlling the whole OptiX OSN 1800 V software, communication, and security features in
OptiX OSN 1800 V.
OptiX OSN 1800 V handles L0, L1, and L2 traffic transmissions, which are handled by the
service units without additional security related control or management functionality.
1.5.2 Scope of Evaluation
This section will define the scope of the part of OptiX OSN 1800 V comprising the TOE to be
evaluated.
1.5.2.1 Physical scope
The TOE is a 'software only', TOE consists of the unified transmission software (UTS) and
underlying OS of the OptiX OSN 1800 V, but not the hardware, which the UTS and
underlying OS is running on. This will be discussed in more detail in the next chapter. In
addition, the software package, signature file, and the guidance documentation are delivered
in CD-ROM:
OptiX OSN 1800 V V100R006C20
Security Target Lite 1 Introduction
Issue 1.53 (2018-10-10) 8
Copyright © Huawei Technologies Co., Ltd.
Type Delivery Item Version
Softwa
re
OptiX OSN 1800 V100R006C20SPC300 Software.zip
SHA-256 checksum:
2acd6990d24786dc7b27b35e6111b3e97e7203b53a2a648af7
fdf302bdb6f8bc
V100R006C20SP
C300
Softwa
re
Signat
ure File
OptiX OSN 1800 V100R006C20SPC300 Software.zip.asc -
Produc
t
Guidan
ce
OSN 1800 V & 1800 I II Compact V100R006C20
Deploying Your Network
Issue 03
CC Huawei Optix OSN 1800V Software V100R006C20 -
AGD_OPE
V0.5
CC Huawei Optix OSN 1800V Software V100R006C20 -
AGD_PRE_Production
V0.4
CC Huawei Optix OSN 1800V Software V100R006C20 -
AGD_PRE_User
V1.1
Huawei OptiX OSN 1800 V V100R006C20 Software
Configuration and Reference
V0.7
1.5.2.2 Logical scope
The TOE boundary from a logical point of view is represented by the elements that are
displayed with a red frame within the rectangle in the figure below. The TOE only consists of
unified transmission software (UTS), and the underlying OS, see red frame in Figure 1-5. As
shown in Figure 1-4, the SCC unit hosts the TOE. The TOE is running on the eight cores of
the CPU. The service unit (including OTN line board, Optical layer board, Packet board, and
TDM board etc) does not contain parts of the TOE. The TOE provides several security
functions, which are described in more detail in chap.1.5.3 .
OptiX OSN 1800 V V100R006C20
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Figure 1-5 TOE logical scope
Figure 1-5 reflects also the basic structure of the TOE with respect to subsystems.
The TOE provides all the security functions.
The TOE also controls the flow of management network traffic between network interfaces by
matching information contained in the headers of network packets against routing table in
forwarding engine.
System control and security management are performed either through LMT which is
connected to the Management plane of the TOE directly via the GE/FE Ethernet port or
through RMT via a secure channel enforcing TLS1.1/1.2 via the GE/FE port on the SCC unit
through the DCN network.
1.5.2.3 Non-TOE Hardware and Software
Based on physical scope and logical scope described so far, a list of configuration is to be
added:
 For management via the ETH interface, authentication is always enabled. Authentication
mode is Authentication, Authorization, Accounting (‘AAA’, i.e. username and password).
Length of password is no less than 8 characters.
 Service of FTP have to be disabled to use the TOE in the certified configuration.
The environment for TOE comprises the following components:
 Local PCs (WebLCT) used by administrators to connect to the TOE for access through
interfaces on SCC unit via a secure channel of TLS, or non-secure channel. Access will
be performed using a command line terminal.
 Remote PCs used by administrators to connect to the TOE for access through interfaces on
Hardware Platform
OptiX OSN 1800 V
ETH
TCP/IP Protocol Stack
ACL
TLS1.1/TLS1.2 SFTP Client
Security Management
Account and
Password
Management
RADIUS Client Security Log
Operation Log
OS
UTS
TOE
SYSLOG Client
NTPv3 Client
OptiX OSN 1800 V software
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SCC unit within the TOE via a secure channel of TLS.
 Since the TOE is part of the OptiX OSN 1800 V device, and it can only operate as part of
the device, which means that all non-TOE parts of the device are also required.
Furthermore, the TOE requires an EMS (Element Management System, it typically runs
the U2000 rich user interface management software), a syslog server and an SFTP Server,
as shown in the following figure. A Radius server is optional and may be used instead of
local authentication.
Figure 1-6 The TOE in its operational environment
1.5.3 Summary of Security Features
1.5.3.1 Identification and authentication
The TOE can authenticate administrative users by user name and password.
The TOE provides a local authentication mode, or can optionally enforce authentication
decisions obtained from a Radius server in the IT environment.
In local authentication mode, accounts and passwords are saved on the local equipment and
authenticated using the local account and password by the local equipment during login. In
RADIUS authentication mode, accounts and passwords are saved on the RADIUS server and
authenticated by the RADIUS server. During login, the accounts and passwords are forwarded
to the RADIUS server, using the RADIUS protocol and the RADIUS server checks the
validity of accounts and passwords.
User authentication is always enforced for EMS sessions via TLS sessions. The use of TLS
connection is always required for accessing the TOE via RMT. For LMT no logically secured
communication channel is required.
Syslog
server
EMS
(Equipment
Management System)
Radius
server
Transport Network
DCN
Network
SFTP
server
TOE
OptiX OSN 1800 V
WebLCT
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1.5.3.2 Authorization
Authorization indicates that devices assign operation authorities to accounts according to their
validity.
The TOE controls access by the group-based authorization framework with predefined role
groups for management. Five hierarchical access groups are offered and can be assigned to
individual user accounts.
Only authenticated users can execute commands of the TOE. Only one user group level can
be assigned to a user account. So the user group level of a user is unambiguous at any time.
All authenticated users of the TOE are administrative users of some kind belonging to one of
the user groups defined below. There are no authenticated non-administrative users.
Accounts are managed in groups and each group represents a specific authority assigned to
the accounts in the group. Table 1-2 lists the groups and their definition. For example, the
accounts of the "administrator" group are authorized to perform all security management and
advanced diagnosis operations. When an account is created, it is authorized to perform certain
operations and is not allowed to perform unauthorized operations. If an account attempts to
perform any unauthorized operation, an error message is displayed and the attempt is logged.
Both administrator and super administrator accounts belong to the administrator level and
both have the privilege to create other administrator or super administrator accounts. The
super administrator is a special administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging operations.
Table 1-2 Groups of accounts
Group Authority
Monitor This group has the lowest authority. The accounts of this group
are authorized to issue query commands and modify some of their
own attributes.
Operator The accounts of this group are authorized to query the system
information and perform some configuration operations.
Maintenance The accounts of this group are authorized to perform all
maintenance operations, including the authority of Operator group
and general maintenance and diagnosis operations
Administrator The accounts of this group are used for security management and
are authorized to perform all query and configuration operations.
Especially, administrators can create super administrator account.
Super administrator The accounts in this group are authorized to perform all
operations of Administrator group and the advanced diagnosis
(debug) operation.
Note: user level in the following content is same as user group; in CC terminology, these are
considered roles.
1.5.3.3 Auditing
Logs record routine maintenance events of the TOE. Administrators can find security
vulnerabilities and risks by checking logs. Considering security, the TOE provides security
logs and operation logs.
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Security logs record operation events related to account management, such as modification of
passwords and addition of accounts.
Operation logs record events related to system configurations, such as modification of
equipment IP addresses and addition of services.
The TOE provides a Syslog solution to resolve the problem of limited equipment storage
space. Both security logs and operation logs can be saved on an external Syslog server.
1.5.3.4 Communication Security
The TOE provides communication security by implementing the TLS protocol. TLS version
1.1 and 1.2 are implemented. TLS certificates are required for establishing TLS encryption
channels. The TLS certificates are managed and issued by carriers. SFTP (description as
below) is used to load TLS certificates onto TOE before establish TLS communications. The
TOE acts as server during the TLS communication established between the TOE and EMS,
that is to say, the EMS will validate the certificate from the TOE. The TOE does not provide
path validation capabilities for X.509 certificates.
The TOE provides an SFTP client for secure file downloading and uploading. Users can use
the SFTP client for fault collection, log uploading, and uploading and downloading of a file
and a database etc. In this application, the TOE serves as a client and the SFTP server is
deployed outside the equipment network and is provided by the carrier.
The SFTP authentication policy is determined by the SFTP server. The TOE supports
password authentication and key authentication. The password authentication indicates that an
SFTP client logs in to a server using an account name and a password. The key authentication
indicates that an SFTP server authenticates a client using the RSA key. For the key
authentication, users need to generate the RSA key on the TOE first and upload the public key
to the SFTP server. The length of the RSA key ranges from 2048 to 4096 bits and is specified
by users.
The TOE uses passphrases to protect private keys on an SFTP client for cryptographic
authentication. When users generate key pairs, they are allowed to indicate the passphrases.
1.5.3.5 Access Control
The TOE provides Access Control List (ACL) for filtering incoming information flows to
management interfaces. An administrator can set deny IP addresses and ports, to limit data
from specific IP addresses and to filter data from specific communication ports. The ACL
function protects equipment from network attacks by controlling data of access requests from
unauthorized IP addresses and ports. The administrator can create, delete, and modify ACL
rules.
Table 1-3 Classification of ACL
Item Feature
Basic ACL Rules are defined based on the source IP address.
Advanced
ACL
Rules are defined based on the source IP address of a data packet,
destination IP address of a data packet, protocol type of the IP bearer
network, and protocol features. The protocol features include source port
of the TCP protocol, destination port of the TCP protocol, and ICMP
protocol type.
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Table 1-4 ACL parameters
Parameter Value Range Description
ACL rule ID 0–0xFFFFFFFF Indicates the ACL rule ID. The value
0xFFFFFFFF indicates that the ACL rule is
automatically allocated by the ACL protocol
or is manually assigned.
ACL
operation
type
Permit and deny Indicates the ACL operation type. The values
are as follows:
 Deny: If a received message does not
comply with a rule in an ACL, the
message is discarded.
 Permit: If a received message complies
with a rule in an ACL, the message is
discarded.
Source IP
address
Source IP address The source IP address and the source
wildcard determine the addresses to which
an access control rule is applicable.
Source
wildcard
0–0xFFFFFFFF The value 0 represents a bit that must be
exactly matched and the value 1 represents a
bit that is ignored.
Sink IP
address
Sink IP address The destination IP address and the sink
wildcard determine the addresses to which
an access control rule is applicable.
Sink wildcard 0–0xFFFFFFFF The value 0 represents a bit that must be
exactly matched and the value 1 represents a
bit that is ignored.
Protocol type TCP, UDP, ICMP, and IP Set this parameter to UDP or TCP when
filtering packets at a UDP or a TCP port. Set
this parameter to ICMP when filtering
packets of the ICMP protocol and code type.
The value IP indicates that the protocol type
is not concerned.
Source port 0–65535 or 0xFFFFFFFF
(0xFFFFFFFF indicates
that this parameter is not
concerned)
This parameter is available only when
Protocol type is set to TCP or UDP.
Sink port 0–65535 or 0xFFFFFFFF
(0xFFFFFFFF indicates
that this parameter is not
concerned)
This parameter is available only when
Protocol type is set to TCP or UDP.
ICMP
protocol type
ICMP protocol type This parameter is available only when
Protocol type is set to ICMP. The value 255
indicates that this parameter is not
concerned.
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Parameter Value Range Description
ICMP code
type
ICMP code type This parameter is available only when
Protocol type is set to ICMP. The value 255
indicates that this parameter is not
concerned.
1.5.3.6 Cryptographic functions
The TOE does not offer cryptographic services, but uses cryptographic mechanisms in the
implementation of its communication security functions (TLS, SFTP) and I&A functions
(certificates, SFTP public key authentication). The TOE is capable of generating the necessary
keys (AES, RSA) or importing them into the TOE. For key generation, the TOE can use its
own deterministic random number generator, which is seeded from the hardware TPM of its
platform.
Details of the algorithms, key lengths and modes of operation are provided in section 7.8 .
1.5.3.7 Security functionality management
Security functionality management include not only authentication, access level, but also
managing security related data consisting of configuration profile and runtime parameters.
According to security functionality management, customized security is provided.
The functions mainly include:
 Management of user accounts and user attributes, including user credentials.
 Management of authentication failure policy
 Access control management, including the association of users and corresponding
privileged functionalities.
 Enabling/disabling trusted channels for local and remote access to the TOE’s
management interfaces
 Management of ACLs and ACL attributes and parameters like IP addresses or address
ranges
 Configuration of network addresses for services used by the TOE, like NTP, Syslog,
RADIUS, SFTP
 Management of the TOE’s time
All security management functions (i.e. commands related to security management) require
sufficient user level for execution (see description of access control for details, chap. 1.5.3.2 ).
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2 CC Conformance Claims
2.1 CC Conformance Claim
This ST is CC Part 2 extended [CC], extended by security functional components as defined
in chap. 5, and CC Part 3 conformant [CC]. The version of [CC] is 3.1R5.
The ST claims conformance to the EAL2 assurance package.
No conformance to a Protection Profile is claimed.
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3 Security Problem Definition
3.1 Asset
The assets to be protected are the information stored, processed or generated by the TOE.
Including below:
1. Audit data: The data which is provided by the TOE during security audit logging
2. Auth data: The data which is used by the TOE to identify and authenticate the external
entities which interact with the TOE.
3. Crypto data: The data which is used by the TOE for digital signature handling and
encryption/decryption purposes.
4. Control data: The data which is used by the TOE for system software, patches update,
and identity checking purposes
5. Configuration data for the TOE, which is used for configuration data of security feature
and functions
6. Management Traffic data, which is the management information exchanged between the
TOE and the EMS from authorized users.
3.2 Threats
This section specifies the threats that are addressed by the TOE and the TOE environment.
As a result, the following threats have been identified:
T.UnwantedManagementTraffic The traffic here only refers to the traffic on management
interfaces, that means, the Unwanted Network Traffic threat only exists on the management
plane. The Unwanted network traffic may originate from an attacker and result in an overload
of the management interfaces, which may cause a failure of the TOE to respond to system
control and normal management operations. As a consequence, the TOE might be unable to
provide some of the TSF while under attack and in particular security management
functionality to update configuration data for the TOE. Subsequently, backup of audit
information before local storage space is exceeded and old audit information is overwritten by
new audit events could be affected. Therefore, Audit data and Configuration data for the TOE
are assets that could be affected by this threat, too.
T.UnauthenticatedAccess An unauthenticated person may attempt to bypass the security of
the TOE so as to access and use security functions and/or non-security functions provided by
the TOE. This could affect all assets as defined in chap. 3.1 .
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T.UnauthorizedAccess A user with restricted action and information access authorization
gains access to unauthorized commands or information. This threat also includes data leakage
to non-intended person or device. This could affect all assets as defined in chap. 3.1 .
T.Intercept A remote attacker is able to intercept, modify and re-use management
information assets that are exchanged between the TOE and EMS. This comprises Auth data
(in particular authentication data of administrative users), Crypto data (regarding this threat
mainly data related to session keys used for secure communication), and Configuration Data
for the TOE. All these assets could be affected by this threat.
3.3 Organizational Security Policies
This section specifies one organizational security policy (OSP) to be met by the TOE and the
TOE environment.
OSP.Accountability The users of the TOE shall be held accountable for their
security-relevant actions within the TOE.
3.4 Assumptions
This section specifies the assumptions on the TOE environment that are necessary for the
TOE to meet its security objectives.
A.Certificates It is assumed that digital certificates that are generated externally by trusted
certification authorities are of good quality i.e. meeting corresponding standards and
providing sufficient security strength through the use of appropriate cryptographic
mechanisms and cryptographic parameters. This applies for the cryptographic mechanisms
and parameters contained in the certificate and as well for the mechanisms and parameters
used to sign the certificate. It is assumed that administrators examine the quality of the
certificates besides verifying the integrity and authenticity before importing them. Especially
certificates signed with weak hashing algorithms are assumed to be not imported into the
TOE.
A.PhysicalProtection It is assumed that the TOE and its operational environment (i.e. the
complete system including attached peripherals, such as a board, and CF card inserted in the
transmission equipment) are protected against unauthorized physical access. It is also
assumed that the local management network, including the RADIUS server, syslog server, and
locally attached management terminals (LMT) together with all related communication lines
are operated in the same physically secured environment as the TOE. Remote management
terminals (RMTs) need to be physically protected on the same level as the TOE but they do
not necessarily have to be kept in the same physical environment. The communication lines
between any RMT and the TOE are protected by cryptographic means and do not need any
physical protection. It is assumed that all RMTs as well as peripherals like RADIUS server or
syslog server are connected to the TOE via the same segregated management network (see
also A.NetworkSegregation).
A.NetworkElements It is assumed that the operational environment provides securely and
correctly working network devices as resources that the TOE needs to cooperate with. This
applies e.g. to the EMS used for TOE management, Syslog servers, SFTP servers and Radius
servers for obtaining authentication and authorization decisions.
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A.NetworkSegregation It is assumed that the operational environment provides segregation
of networks by deploying the management interface in TOE into an independent local
network.
A.NoEvil It is assumed that personnel working as authorized administrators shall be carefully
selected for trustworthiness and trained for proper operation of the TOE. These administrative
users will be competent, and not careless or willfully negligent or hostile, and will follow and
abide by the instructions provided by the TOE documentation.
A.Time It is assumed that external clock used by the NTP client is reliable.
A.Hardware It is assumed that the underlying hardware of OptiX OSN 1800 V, which is
outside the scope of the TOE, works correctly.
A.RNG It is assumed that the TPM, which provides the seed to the RNG, is reliable and
therefore provides a seed value of sufficient entropy.
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4 Security Objectives
4.1 Security Objectives for the TOE
The following objectives must be met by the TOE:
 O.DataFilter The TOE shall ensure that only allowed management traffic goes through
the TOE.
 O.Authorization The TOE shall implement different authorization roles that can be
assigned to users in order to restrict the functionality that is available to them.
 O.Authentication The TOE must authenticate users before access to data and security
functions is granted.
 O.Audit The TOE shall provide functionality to generate audit records for
security-relevant administrator actions.
 O.Communication The TOE must implement logical protection measures for network
communication between the TOE and LMT/RMT from the operational environment.
 O.SecurityManagement The TOE shall provide functionality to manage security
functions provided by the TOE.
4.2 Security Objectives for the Operational Environment
 OE.Certificates Digital certificates that are generated externally by trusted certification
authorities shall be of good quality i.e. meeting corresponding standards and providing
sufficient security strength through the use of appropriate cryptographic mechanisms and
cryptographic parameters. This applies for the cryptographic mechanisms and parameters
contained in the certificate and as well for the mechanisms and parameters used to sign
the certificate. Administrators shall examine the quality of the certificates besides
verifying the integrity and authenticity before importing them. Especially certificates
signed with weak hashing algorithms shall not be imported into the TOE.
 OE.PhysicalProtection The TOE and its operational environment (i.e. the complete
system including attached peripherals, such as a board, and CF card inserted in the
transmission equipment) shall be protected against unauthorized physical access. The
local management network, including the RADIUS server, syslog server, and locally
attached management terminals (LMT) together with all related communication lines
shall be operated in the same physically secured environment as the TOE. Remote
management terminals (RMTs) shall be physically protected on the same level as the
TOE but they do not necessarily have to be kept in the same physical environment. The
communication lines between any RMT and the TOE are protected by cryptographic
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means and do not need any physically protection. All RMTs as well as peripherals like
RADIUS server or syslog server shall be connected to the TOE via the same segregated
management network (see also OE.NetworkSegregation).
 OE.NetworkElements The operational environment shall provide securely and correctly
working network devices as resources that the TOE needs to cooperate with. The
behavior of such network devices provided by the operational environment shall be
secure and correct. This applies e.g. to EMS used for TOE management, Syslog servers,
SFTP servers and Radius servers for obtaining authentication and authorization
decisions.
 OE.NetworkSegregation The operational environment shall provide segregation of
networks by deploying the management interface in TOE into an independent local
network.
 OE.NoEvil Personnel working as authorized administrators shall be carefully selected
for trustworthiness and trained for proper operation of the TOE. These administrative
users shall be competent, and not careless or willfully negligent or hostile, and shall
follow and abide by the instructions provided by the TOE documentation.
 OE.Time The external clock used by the NTP client shall be reliable.
 OE.Hardware The underlying hardware of OptiX OSN 1800 V, which is outside the
scope of the TOE, shall work correctly.
 OE.RNG The TPM, which provides the seed to the RNG, shall be reliable and therefore
provides a seed value of sufficient entropy.
4.3 Rationale for Security Objectives
The following table provides a mapping of TOE objectives to threats, showing that each
objective is at least covered by one threat.
Table 4-1 Mapping objectives to threats and OSPs
Threat / OSP Security Objectives Rationale for Security Objectives
T.UnwantedManage
mentTraffic
O.DataFilter
O.SecurityManagement
This threat is countered by O.DataFilter
ensuring that unwanted traffic is filtered
and cannot deplete the network resources.
The filter rules can be configured by
authorized users with sufficient user level
(O.SecurityManagement).
T.UnauthenticatedA
ccess
O.Authentication
O.Audit
O.SecurityManagement
The threat of unauthenticated access to the
TOE is countered by requiring the TOE to
implement an authentication mechanism
for its users (O.Authentication).
Authentication mechanisms can be
configured by users with sufficient user
level (O.SecurityManagement). In
addition, login attempts are logged
allowing detection of attempts and
possibly tracing of culprits (O.Audit).
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Threat / OSP Security Objectives Rationale for Security Objectives
T.UnauthorizedAcce
ss
O.Authorization
O.Audit
O.SecurityManagement
The threat of unauthorized access is
countered by requiring the TOE to
implement an access control mechanism
(O.Authorization).
Access control mechanisms (including
user levels) can be configured by users
with sufficient user level
(O.SecurityManagement).
In addition, actions are logged allowing
detection of attempts and possibly tracing
of culprits (O.Audit).
T. Intercept O.Communication
O.SecurityManagement
The threat of eavesdropping is countered
by requiring communications security via
TLS and SFTP for communication
between EMS and the TOE
(O.Communication).
Management of secure communication
channels can be performed by users with
sufficient user level
(O.SecurityManagement).
OSP.Accountability O.Authentication
O.Audit
Accountability for security-relevant
actions is achieved by generating audit
records for those events (O.Audit).
Attributing security-relevant events to
their originators requires users to be
properly identified and authenticated
(O.Authentication)
The following table provides a mapping of the objectives for the operational environment to
assumptions, showing that each objective is covered exactly by one assumption. The
objectives for the environment are mirrored by the assumptions. Therefore, the mapping is
trivial.
A. Certificates is upheld by OE.Certificates, which is a rephrasing of the assumption.
A. PhysicalProtection is upheld by OE.PhysicalProtection, which is a rephrasing of the
assumption.
A.NetworkElements is upheld by OE.NetworkElements, which is a rephrasing of the
assumption.
A.NetworkSegregation is upheld by OE.NetworkSegregation, which is a rephrasing of the
assumption.
A.NoEvil is upheld by OE.NoEvil, which is a rephrasing of the assumption.
A.Hardware is upheld by OE.Hardware, which is a rephrasing of the assumption.
A.Time is upheld by OE.Time, which is a rephrasing of the assumption.
A.RNG is upheld by OE.RNG, which is a rephrasing of the assumption.
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Table 4-2 Mapping objectives for the environment to assumptions
Environmental Objective Threat /Assumption
OE.Certificates A.Certificates
OE.PhysicalProtection A.PhysicalProtection
OE.NetworkElements A.NetworkElements
OE.NetworkSegregation A.NetworkSegregation
OE.NoEvil A.NoEvil
OE.Hardware A.Hardware
OE.Time A.Time
OE.RNG A.RNG
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5 Extended Components Definition
There is one extended component defined which refers to random number generation and is
taken from chap. 3.1 [AIS20].
5.1 FCS_RNG Generation of random numbers
Family Behaviour
This family defines quality requirements for the generation of random numbers that are
intended to be used for cryptographic purposes.
Component levelling:
FCS_RNG.1 Generation of random numbers, requires that the random number generator
implements defined security capabilities and that the random numbers meet a defined quality
metric.
Management: FCS_RNG.1
There are no management activities foreseen.
Audit: FCS_RNG.1
There are no actions defined to be auditable.
FCS_RNG.1 Random number generation
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_RNG.1.1 The TSF shall provide a [selection: physical, non-physical true,
deterministic, hybrid physical, hybrid deterministic] random number generator that
implements: [assignment: list of security capabilities].
FCS_RNG.1.2 The TSF shall provide random numbers that meet [assignment: a defined
quality metric].
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6 Security Requirements for the TOE
6.1 Conventions
The following conventions are used for the completion of operations:
 Strikethrough indicates text removed as a refinement
 (underlined text in parentheses) indicates additional text provided as a refinement.
 Bold text indicates the completion of an assignment.
 Italicised and bold text indicates the completion of a selection.
 Iteration/Identifier indicates an element of the iteration, where Identifier distinguishes the different
iterations.
6.2 Security Functional Requirements
6.2.1 Security Audit (FAU)
6.2.1.1 FAU_GEN.1 Audit Data Generation
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) The following auditable events recorded to operation logs:
i. user activity
1. login, logout
2. system and service configuration operation requests (i.e. configuration of the
device after start-up)
3. system security configuration.
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The following auditable events recorded to security logs:
ii. user management
1. add, delete, modify users
2. user password change
3. user group level change
4. user lock and unlock
Application Note: Changes to user levels are covered by c.ii.3. user group level change.
Command levels are fixed and cannot be modified. Audit functionality shall be enabled by
default during start-up of the device. The audit functionality cannot be shut down manually.
The audit functionality can only be shut down by shutdown of the OptiX OSN 1800 V itself.
In that case there is only an audit record generated for the shutdown of the device but not the
audit functionality in particular.
FAU_GEN.1.2 The TSF shall record within each audit record at least the following
information:
a) Date and time of the event, type of event, subject identity (if applicable), and the
outcome (success or failure) of the event; and
b) For each audit event type, based on the auditable event definitions of the functional
components included in the PP/ST, Operation Type (if applicable), Operation Object
(if applicable), Access IP Address (if applicable), User Name (if applicable).
Application Note: The term ‘if applicable’ shall be read as ‘whenever an event can be
associated with the specified information’. For example, if an event can be associated with a
User ID, then the event shall be audited and the audit information shall contain the User ID. If
the event cannot be associated with the User ID, the event shall be audited and the audit
information shall not contain User ID information. If multiple conditional information can be
associated with an event (e.g. interface and User ID can be associated with an event), all the
conditional information shall be contained in the audit information when auditing the event.
6.2.1.2 FAU_GEN.2 User Identity Association
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 causes the event.
6.2.1.3 FAU_SAR.1 Audit Review
FAU_SAR.1.1 The TSF shall provide Administrators and Super administrators with
the capability to read all information from the audit records.
FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the user
to interpret the information.
6.2.1.4 FAU_SAR.2 Restricted Audit Review
FAU_SAR.2.1 The TSF shall prohibit all users read access to the audit records, except
those users that have been granted explicit read-access.
6.2.1.5 FAU_STG.1 Protected Audit Trail Storage
FAU_STG.1.1 The TSF shall protect the stored audit records in the audit trail from
unauthorized deletion.
FAU_STG.1.2 The TSF shall be able to prevent unauthorized modifications to the stored
audit records in the audit trail.
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6.2.1.6 FAU_STG.3 Action in Case of Possible Audit Data Loss
FAU_STG.3.1 The TSF shall overwrite the oldest records if the audit trail exceeds the
size of the storage device.
Application Note: The audit trail is recorded in log file on the storage media (FLASH), the
size of log file is fixed.
6.2.2 Cryptographic Support (FCS)
6.2.2.1 FCS_CKM.1/DH Cryptographic key generation
FCS_CKM.1.1/DH The TSF shall generate cryptographic keys in accordance with a
specified cryptographic key generation algorithm diffie-hellman-group14-sha1 and specified
cryptographic key sizes 2048bits that meet the following: [NIST Special Publication
800-56A], [RFC 4253], [RFC 3526], [RFC 4346], [RFC 5246], [PKCS#3] for SSH/TLS.
Application Note: When establish SSH/TLS communications, the TOE generates a shared
secret value with the peer during the DH key agreement. The shared secret value is used to
derive session keys used for encryption and decryption, and generation and verification of
integrity protection information for SSH/TLS communication. The key generation is
performed according to [RFC 4253].
6.2.2.2 FCS_CKM.1/RSA Cryptographic key generation
FCS_CKM.1.1/RSA The TSF shall generate cryptographic keys in accordance with a
specified cryptographic key generation algorithm RSA and specified cryptographic key sizes
2048 bits to 4096 bits that meet the following: [FIPS 186-4], chap. 5.1, RSA key pairs for
RSASSA-PKCS1-V1_5 using CRT, chap. 6.3.
Application Note: The RSA Key Pair generation algorithm meets [FIPS 186-4], chap. 5.1 and
adapts method in Appendix B.3.3. The TOE uses RSA keygen method to generate ‘SSH host
key’ which is used as client key within the SFTP protocol.
6.2.2.3 FCS_CKM.2 Cryptographic key distribution
FCS_CKM.2.1 The TSF shall distribute cryptographic keys in accordance with a
specified cryptographic key distribution method:
 diffie-hellman-group14-sha1 that meets the following: [NIST Special Publication
800-56A], [RFC 4253], [RFC 3526], [RFC 4346], [RFC 5246], [PKCS#3] for
SSH and TLS.
 RSA-based key establishment scheme that meets the following: [NIST SP
800-56B] for TLS.
Application Note: When establish SSH/TLS communications, the TOE generates a shared
secret value with the peer during the DH key agreement or RSA key exchange. The shared
secret value is used to derive session keys used for encryption and decryption, and generation
and verification of integrity protection information for SSH/TLS communication. The key
generation is performed according to [RFC 4253].
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6.2.2.4 FCS_CKM.4/DH Cryptographic key destruction
FCS_CKM.4.1/DH The TSF shall destroy cryptographic keys in accordance with a
specified cryptographic key destruction method deallocation of the resource that meets the
following: none.
Application Note: Whenever a Trusted Channel is terminated for whatever reason, all
temporary session keys are erased from the volatile memory by the post-processing routines
associated with the Trusted Channel. These session keys are generated by FCS_CKM.1/DH
6.2.2.5 FCS_CKM.4/RSA Cryptographic key destruction
FCS_CKM.4.1/RSA The TSF shall destroy cryptographic (RSA) keys in accordance with
a specified cryptographic key destruction method full flash erase by overwriting with 1 that
meets the following: none
Application Note: This SFR was refined to RSA keys in the non-volatile memory only. The
RSA Keys will be stored in flash memory of the SCC board. The private key cannot be
exported. OptiX OSN1800V provides a manual method to erase all the data on flash at a time
(i.e. full flash erase by overwriting the whole flash memory with '1'). All the data in the flash
memory including RSA Keys and the configuration DB will be erased, and the equipment
returns to the factory reset status.
According to A.PhysicalProtection, the OptiX OSN1800V device is deployed in a secured
environment. Therefore, the key destruction mechanism for RSA keys in non-volatile memory
is intended to be used when the TOE is leaving the secured area (e.g. when decommissioned)
to destroy residual information. There is no destruction mechanism to selectively destroy RSA
keys during regular use of the TOE.
6.2.2.6 FCS_COP.1/AES Cryptographic operation
FCS_COP.1.1/AES The TSF shall perform symmetric de- and encryption in accordance
with a specified cryptographic algorithm AES, with operating modes, keysizes and underlying
standards as defined in the following table.
Table 6-1 AES operating modes supported by the TOE for symmetric de- and encryption
AES operating mode Cryptographic key sizes
[bits]
Meeting the standards
GCM mode 128, 256 [FIPS 197], [NIST SP 800-38D]
CTR mode 128, 192, 256 [FIPS 197], [NIST SP 800-38A]
CBC mode 128, 256 [FIPS 197], [NIST SP 800-38A]
Application Note: AES-128, 192, 256 in CTR mode is used for encryption and decryption
within SSH communication. AES-128/256 in CBC mode is not supported within SSH
communication.
AES-128/256 in GCM mode is used for encryption and decryption within TLS
communication.
AES-128/256 in CBC mode is used for encryption and decryption within TLS
communication.
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6.2.2.7 FCS_COP.1/RSA Cryptographic operation
FCS_COP.1.1/RSA The TSF shall perform asymmetric authentication in accordance with a
specified cryptographic algorithm RSA and cryptographic key sizes 2048 to 4096bits that
meet the following: RSA Cryptography Standard ([PKCS#1 V2.1],
RSASSA-PKCS1-v1_5 for SSH and TLS).
Application Note: RSA with key size of 2048 to 4096bits according to PKCS#1 V2.1,
RSASSA-PKCS1-v1_5 is used for asymmetric authentication of the TOE (as SFTP client) for
SSH according to chap. 6.6 [RFC 4253], ssh-rsa as well as 'publickey' authentication of the
TOE (as SFTP client) to the server for SSH according to chap. 7 [RFC 4252].
RSA with key size of 2048 to 4096bits according to PKCS#1 V2.1, RSASSA-PKCS1-v1_5 is
used for asymmetric authentication of TLS. (TLS cipher suites refer to 6.2.8.1)
Certificates used by TLS are imported by users into the TOE. Therefore, the TOE does not
provide path validation capabilities for X.509 certificates. It is assumed that the weak RSA
key (size less than 2048 bits) and hashing algorithms will not to be imported into the TOE. If
the hashing algorithms specified in the certificates are not supported by the TOE, the TLS
communication will not be established successfully.
6.2.2.8 FCS_COP.1/HMAC-SHA1 Cryptographic operation
FCS_COP.1.1/HMAC-SHA1 The TSF shall perform data integrity generation and
verification in accordance with a specified cryptographic algorithm HMAC-SHA1 and
cryptographic key sizes 160 bits that meet the following: [RFC 2104], [FIPS 198-1].
Application Note: HMAC-SHA1 is used for integrity protection of SSH communication.
6.2.2.9 FCS_COP.1/HMAC-SHA1-96 Cryptographic operation
FCS_COP.1.1/HMAC_SHA1-96 The TSF shall perform data integrity generation and
verification in accordance with a specified cryptographic algorithm HMAC-SHA1-96 and
cryptographic key sizes 160 bits that meet the following: [RFC 2104], [FIPS 198-1].
Application Note: HMAC-SHA1-96 is used for integrity protection of SSH communication.
HMAC-SHA1-96 is cryptographic key sizes of 160 bit that is truncated to 96 bit.
6.2.2.10 FCS_COP.1/HMAC-SHA256 Cryptographic operation
FCS_COP.1.1/HMAC-SHA256 The TSF shall perform keyed-hash message
authentication in accordance with a specified cryptographic algorithm HMAC-SHA256 and
cryptographic key sizes 256bits that meet the following: [RFC 2104], [FIPS 180-4].
Application Note: HMAC-SHA256 is used in the TLS communication according to [RFC
4346] and [RFC 5246].
6.2.2.11 FCS_COP.1/HMAC-SHA384 Cryptographic operation
FCS_COP.1.1/HMAC-SHA384 The TSF shall perform keyed-hash message
authentication in accordance with a specified cryptographic algorithm HMAC-SHA384 and
cryptographic key sizes 384bits that meet the following: [RFC 2104], [FIPS 180-4].
Application Note: HMAC-SHA384 is used in the TLS communication according to [RFC
4346] and [RFC 5246].
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6.2.2.12 FCS_COP.1/SHA1 Cryptographic operation
FCS_COP.1.1/SHA1 The TSF shall perform hashing in accordance with a specified
cryptographic algorithm SHA1 and cryptographic key sizes None that meet the following:
[FIPS 180-3].
Application Note: SHA1 is used for hashing within SSH communication.
6.2.2.13 FCS_COP.1/SHA256 Cryptographic operation
FCS_COP.1.1/SHA256 The TSF shall perform hashing in accordance with a specified
cryptographic algorithm SHA256 and cryptographic key sizes None that meet the following:
[FIPS 180-4].
Application Note: SHA256 is used in TLS communication.
6.2.2.14 FCS_COP.1/SHA384 Cryptographic operation
FCS_COP.1.1/SHA384 The TSF shall perform hashing in accordance with a specified
cryptographic algorithm SHA384 and cryptographic key sizes None that meet the following:
[FIPS 180-4].
Application Note: SHA384 is used in TLS communication.
6.2.2.15 FCS_COP.1/PBKDF2 Cryptographic operation
FCS_COP.1.1/PBKDF2 The TSF shall perform hashing in accordance with a specified
cryptographic algorithm PBKDF2(HMAC-SHA256) with iteration number 10000 and
cryptographic key sizes None that meet the following: [RFC2898].
Application Note: PBKDF2 is used for hashing passwords before storage in non-volatile
memory. The salt used in PBKDF2 is a 16 byte size random number obtained from the TOE’s
deterministic random number generator.
6.2.2.16 FCS_RNG.1 Generation of random numbers
FCS_RNG.1.1 The TSF shall provide a deterministic random number generator that
implements:
 DRG.3.1: If initialized with a random seed of 32 bytes that shall contain at least 128
bit entropy the internal state of the RNG shall have Min-entropy of at least 100 bits.
 DRG.3.2: The DRNG provides forward secrecy.
 DRG.3.3: The DRNG provides backward secrecy even if the current internal state is
known.
FCS_RNG.1.2 The TSF shall provide random numbers that meet:
 DRG.3.4: The RNG, initialized with a random seed of 256 bits during the preparative
operations ensured by the preparative procedures for users generates output for
which more than 214 strings of bit length 128 are mutually different with probability
greater than 1-2-8.
 DRG.3.5: Statistical test suites cannot practically distinguish the random numbers
from output sequences of an ideal RNG. The random numbers must pass test
procedure A and no other test suites.
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Application Note: The operations have been performed according to chap. 4.8 of [AIS20]. For
certified use of the TOE, the random seed of 32 bytes shall contain at least 128 bits entropy.
The seed value is provided by the hardware TPM chip integrated in the SCC. The TOE will
seed the DRNG at the module initialization stage before start of TLS-based communication
and SSH-based communication.
The DRNG complies with [NIST SP 800-90A] using HMAC-DRBG (SHA-256).
6.2.3 User Data Protection (FDP)
6.2.3.1 FDP_ACC.1 Subset Access Control
FDP_ACC.1.1 The TSF shall enforce the user group SFP on
Subject: user session;
Objects: commands provided by TOE;
Operation: Execute
6.2.3.2 FDP_ACF.1 Security Attribute based Access Control
FDP_ACF.1.1 The TSF shall enforce the user group SFP to objects based on the
following:
Subject security attributes
users and their following security attributes:
 user Identity
 user level
Objects security attributes:
commands and their following security attributes:
 Commands and command level (There are five command levels: Monitor, Operate,
Maintain, Manage, Debug)
FDP_ACF.1.2 The TSF shall enforce the following rules to determine if an operation
among controlled subjects and controlled objects is allowed:
1. Only authorized users are permitted access to commands.
2. Users can be configured with different user group to control the device access
permission.
3. There are five user groups: Monitor, Operator, Maintainer, Administrator, Super
administrator, in ascending order of privilege level.
4. Each user group corresponds to different command levels. A user can run all
commands from the command level corresponding to his user level (see table 7-1)
and below.
5. The command level is defined by the software and cannot be changed.
FDP_ACF.1.3 The TSF shall explicitly authorise access of subjects to objects based on
the following additional rules: none.
FDP_ACF.1.4 The TSF shall explicitly deny access of subjects to objects based on the
following additional rules: none.
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6.2.3.3 FDP_IFC.1 Subset Information Flow Control
FDP_IFC.1.1 The TSF shall enforce the Management Network Traffic Flow Filtering
SFP on
Subjects:
packets from the management network
Information:
Package content (management data);
Operations:
Permit, Deny the incoming of packets from the management network based on
information security attributes as defined in chap. 6.2.3.4.
6.2.3.4 FDP_IFF.1 Simple Security Attributes
FDP_IFF.1.1 The TSF shall enforce the Management Network Traffic Flow Filtering
SFP based on the following types of subject and information security attributes
Subject: packets from the management network
Subject attributes: Source IP address, Destination IP address, protocol type, Source tcp
or udp port number, Destination tcp or udp port number
FDP_IFF.1.2 The TSF shall permit an information flow between a controlled subject
and controlled information via a controlled operation if the following rules hold:
1. Whenever an incoming management network packet is handled by TCPIP protocol
layer 3 (forwarding or accepting) on TOE, the Access Control List (ACL) will be
checked.
2. The ACL rules could either permit or deny forwarding or accepting based on the
information security attributes 'source IP address', 'destination IP address',
'protocol type', 'source tcp or udp port number', 'destination tcp or udp port
number'. Rules have to contain at least one of the attributes but may contain
several attributes.
3. For every incoming management network packet that is intended to be forwarded
or accepted by the TOE the ACL is checked for a rule that matches the attributes of
the packet, respectively starting from the first entry in the ACL. The ACL is
checked until the first matching rule is found. The network packet is then either
passed (forwarded/accepted) or discarded according to the matching rule in the
ACL. If no matching rule is found, the packet is passed.
FDP_IFF.1.3 The TSF shall enforce the no additional information flow control SFP
rules.
FDP_IFF.1.4 The TSF shall explicitly authorize an information flow based on the
following rules: none.
FDP_IFF.1.5 The TSF shall explicitly deny an information flow based on the following
rules: none.
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6.2.4 Identification and Authentication (FIA)
6.2.4.1 FIA_AFL.1 Authentication Failure Handling
FIA_AFL.1.1 The TSF shall detect when 5 (consecutive) unsuccessful authentication
attempts occur (and the interval between two attempts is shorter than three minutes) related to
user logging in.
FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has
been met, the TSF shall
1. lock the offending user ID;
2. audit the event in the security log.
Application Note: The default value for the maximum number of consecutive failed logins is
five.
6.2.4.2 FIA_ATD.1 User Attribute Definition
FIA_ATD.1.1 The TSF shall maintain the following list of security attributes belonging
to individual users:
1. user ID
2. user validity period
3. user level
4. password
5. password validity period
6. the inactivity time after which an account is automatically logged out.
7. Status of the account (locked/unlocked)
8. number of failed consecutive logins within certain period of time and timestamp of
last successful login
6.2.4.3 FIA_UAU.2 User authentication before any action
FIA_UAU.2.1 The TSF shall require each user to be successfully authenticated before
allowing any other TSF-mediated actions on behalf of that user.
Application Note: Authentication is possible by username and password.
6.2.4.4 FIA_UAU.5 Multiple Authentication Mechanisms
FIA_UAU.5.1 The TSF shall provide the following authentication mechanisms:
1. Remote authentication by RADIUS;
2. Local Authentication by local database of TOE
to support user authentication.
FIA_UAU.5.2 The TSF shall authenticate any user's identity according to the following:
1. For Remote authentication by RADIUS;
2. For local Authentication, the TSF will authenticate the users based on the configured
Identification (including user id and password).
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Application Note: The TOE can use only one of the mechanisms at any given time. The
Administrator can configure which mechanism is used by the TOE.
6.2.4.5 FIA_UID.2 User identification before any action
FIA_UID.2.1The TSF shall require each user to be successfully identified before allowing
any other TSF-mediated actions on behalf of that user.
Application Note: Authentication is possible by username and password. The user is
identified by his username if he is able to successfully authenticate with his username and
corresponding password.
6.2.4.6 FIA_USB.1 User-subject binding
FIA_USB.1.1 The TSF shall associate the following user security attributes with
subjects acting on the behalf of that user:
 User ID
 User level
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: 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: None.
Application Note: The TOE subjects of relevance are management sessions and SFTP
sessions.
6.2.5 Security Management (FMT)
6.2.5.1 FMT_MOF.1 Management of Security Functions Behavior
FMT_MOF.1.1 The TSF shall restrict the ability to determine the behavior of the
functions defined in FMT_SMF.1 to users with sufficient user level as defined in
FMT_SMR.1.
6.2.5.2 FMT_MSA.1/ACFATD Management of Security Attributes (user
group SFP)
FMT_MSA.1.1/ACFATD The TSF shall enforce the user group SFP to restrict the ability
to query, modify the security attributes NTP server address, SYSLOG server address,
RADIUS server address, SFTP server address, and Attributes identified in FDP_ACF.1
and FIA_ATD.1 to the users with sufficient user level as defined in FMT_SMR.1.
6.2.5.3 FMT_MSA.1/IFF Management of Security Attributes
FMT_MSA.1.1/IFF The TSF shall enforce the Management Network Filtering SFP to
restrict the ability to delete, modify the security attributes identified in FDP_IFF.1 to users
with sufficient user level as defined in FMT_SMR.1
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6.2.5.4 FMT_MSA.3/ACFATD Static Attribute Initialization
FMT_MSA.3.1/ACFATD The TSF shall enforce the user group SFP to provide
permissive default values for security attributes (User Group associations) that are used to
enforce the SFP.
FMT_MSA.3.2/ACFATD The TSF shall allow users with sufficient user level as defined
in FMT_SMR.1 to specify alternative initial values to override the default values when an
object or information is created.
6.2.5.5 FMT_MSA.3/IFF Static Attribute Initialization
FMT_MSA.3.1/IFF The TSF shall enforce the Management Network Filtering SFP
(based on ACL) to provide permissive default values for security attributes that are used to
enforce the SFP.
FMT_MSA.3.2/IFF The TSF shall allow users with sufficient user level as defined in
FMT_SMR.1 to specify alternative initial values to override the default values when an
object or information is created.
6.2.5.6 FMT_SMF.1 Specification of Management Functions
FMT_SMF.1.1 The TSF shall be capable of performing the following management
functions:
1. Management of user accounts and user attributes, including user credentials
2. Management of authentication failure policy
3. Management of ACLs and ACL parameters like IP addresses or address ranges
4. Configuration of network addresses for services used by the TOE, like NTP, Syslog,
RADIUS, SFTP
5. Enabling/disabling trusted channels for local and remote access to the TOE’s
management interfaces
6. Management of the TOE’s time
6.2.5.7 FMT_SMR.1 Security Roles
FMT_SMR.1.1 The TSF shall maintain the roles
1. Monitor (as defined in the table below)
2. Operator (as defined in the table below)
3. Maintenance (as defined in the table below)
4. Administrator (as defined in the table below)
5. Super administrator (as defined in the table below)
Role Authority
Monitor This group has the lowest authority. The accounts of
this group are authorized to issue query commands and
modify some of their own attributes.
Operator The accounts of this group are authorized to query the
system information and perform some configuration
operations.
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Role Authority
Maintenance The accounts of this group are authorized to perform all
maintenance operations, including the authority of
Operator group and general maintenance and diagnosis
operations
Administrator The accounts of this group are used for security
management and are authorized to perform all query
and configuration operations. Especially, administrators
can create super administrator account.
Super administrator The accounts in this group are authorized to perform all
operations of Administrator group and the advanced
diagnosis (debug) operation.
Application Note: The roles are hierarchical, i.e. each role includes all authorities of the
previous roles in addition to the authorities described for the role itself.
FMT_SMR.1.2 The TSF shall be able to associate users with roles.
6.2.6 Protection of the TSF (FPT)
6.2.6.1 FPT_STM.1 Reliable Timestamps
FPT_STM.1.1 The TSF shall be able to provide reliable timestamps.
6.2.7 TOE access (FTA)
6.2.7.1 FTA_SSL.3 TSF-initiated Termination
FTA_SSL.3.1 The TSF shall terminate an interactive session after a time interval of
user inactivity which can be configured.
6.2.7.2 FTA_TSE.1 TOE Session Establishment
FTA_TSE.1.1 The TSF shall be able to deny session establishment based on
1. authentication failure
2. Source IP address
6.2.8 Trusted Path/Channels (FTP)
6.2.8.1 FTP_ITC.1/TLS Inter-TSF trusted channel
FTP_ITC.1.1/TLS The TSF shall provide a communication channel between itself and
another trusted IT product that is logically distinct from other communication channels and
provides assured identification of its end points and protection of the channel data from
modification and disclosure.
Application Note: To establish a trusted channel, the TLS protocol shall be used. TLS
complies with RFC 5246 (TLS1.2), and RFC 4346 (TLS1.1).
The following cipher suites for TLS-based communication are supported by the TOE:
• TLS_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
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• TLS_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
• TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
• TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
• TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
• TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
• TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
• TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
Client authentication is performed password-based on the application layer.
FTP_ITC.1.2/TLS The TSF shall permit another trusted IT product to initiate
communication via the trusted channel.
Application Note: The EMS will act as TLS client to initiate communication to the TOE
which acts as TLS server.
FTP_ITC.1.3/TLS The TSF shall initiate communication via the trusted channel for none.
Application Note: The TSF do not initiate any TLS-based communication, but offers the
ability for protected communication for users sessions.
6.2.8.2 FTP_ITC.1/SFTP Inter-TSF trusted channel
FTP_ITC.1.1/SFTP The TSF shall provide a communication channel between itself and
another trusted IT product that is logically distinct from other communication channels and
provides assured identification of its end points and protection of the channel data from
modification and disclosure.
FTP_ITC.1.2/SFTP The TSF shall permit the TSF to initiate communication via the
trusted channel.
FTP_ITC.1.3/SFTP The TSF shall initiate communication via the trusted channel for file
transfer via SFTP.
Application Note: To establish a trusted channel, the SSH(SFTP) protocol shall be used. SFTP
complies with [RFC 4251], [RFC 4252], [RFC 4253], and [RFC 4254].
For SSH/SFTP-based communications the following algorithms and ciphers are supported:
 Authentication can be performed either public key-based or password-based as
described in [RFC 4252].
 Key exchange is performed using diffie-hellman-group 14-sha1
 The public key algorithm of the SSH transport implementation is ssh-rsa.
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 For data encryption AES128-CTR, AES192-CTR and AES256-CTR are supported.
 For data integrity protection HMAC-SHA1, HMAC-SHA1-96 are supported.
6.3 Security Functional Requirements Rationale
6.3.1 Coverage
The following table provides a mapping of SFR to the security objectives, showing that each
security functional requirement addresses at least one security objective.
Table 6-2 Mapping SFRs to objectives
Security Functional Requirements Objectives
FAU_GEN.1 O.Audit
FAU_GEN.2 O.Audit
FAU_SAR.1 O.Audit
FAU_SAR.2 O.Audit
FAU_STG.1 O.Audit
FAU_STG.3 O.Audit
FCS_COP.1/AES
FCS_COP.1/RSA
FCS_COP.1/HMAC-SHA1
FCS_COP.1/HMAC-SHA1-96
FCS_COP.1/HMAC-SHA256
FCS_COP.1/HMAC-SHA384
FCS_COP.1/SHA256
FCS_COP.1/SHA384
FCS_COP.1/SHA1
O.Communication
FCS_COP.1/PBKDF2 O.Authentication, O.Communication
FCS_CKM.1/DH
FCS_CKM.1/RSA
O.Communication
FCS_CKM.2 O.Communication
FCS_CKM.4/DH
FCS_CKM.4/RSA
O.Communication
FCS_RNG.1 O.Communication
FDP_ACC.1 O.Authorization
FDP_ACF.1 O.Authorization
FDP_IFC.1 O.DataFilter
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FDP_IFF.1 O.DataFilter
FIA_AFL.1 O.Authentication
FIA_ATD.1 O.Authentication
O.Authorization
FIA_UAU.2 O.Authentication
FIA_UAU.5 O.Authentication
FIA_UID.2 O.Authentication
O.Authorization
FIA_USB.1 O.Authentication
O.Authorization
FMT_MOF.1 O.Authorization
O.SecurityManagement
FMT_MSA.1/ACFATD O.Authorization
O.SecurityManagement
FMT_MSA.1/IFF O.Authorization
O.DataFilter
O.SecurityManagement
FMT_MSA.3/ACFATD O.Authorization
O.SecurityManagement
FMT_MSA.3/IFF O.Authorization
O.DataFilter
O.SecurityManagement
FMT_SMF.1 O.SecurityManagement
O.DataFilter
FMT_SMR.1 O.Authorization
O.SecurityManagement
FPT_STM.1 O.Audit
FTA_SSL.3 O.Authentication
FTA_TSE.1 O.DataFilter
O.Authentication
FTP_ITC.1/TLS O.Authentication
O.Communication
FTP_ITC.1/SFTP O.Authentication
O.Communication
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6.3.2 Sufficiency
The following rationale provides justification for each security objective for the TOE,
showing that the security functional requirements are suitable to meet and achieve the security
objectives:
Table 6-3 SFR sufficiency analysis
Security objective Rationale
O.DataFilter The requirement of ACL is defined in FDP_IFF.1 and
FDP_IFC.1. The requirements on management functionality for
the definition of ACL are provided in FMT_MSA.1/IFF,
FMT_MSA.3/IFF and FMT_SMF.1.
Rejection of connections is addressed by FTA_TSE.1.
O.Audit The generation of audit records is implemented by
FAU_GEN.1. Audit records are supposed to include timestamp
as provided by FPT_STM.1 and user identities as defined in
FAU_GEN.2 where applicable. User identities are available
through binding management sessions to their users
(FIA_USB.1).
Requirements on reading audit records are defined in
FAU_SAR.1 and FAU_SAR.2. The protection of the stored
audit records against unauthorized modification is implemented
in FAU_STG.1. If the audit trail exceeds the size of the storage
device The TSF shall roll back the oldest records as required by
FAU_STG.3.
O.Communication Communication security is implemented by the establishment of
a trusted channel for remote users in FTP_ITC.1/TLS and
FTP_ITC.1/SFTP.
FCS_COP.1/AES, FCS_COP.1/RSA,
FCS_COP.1/HMAC-SHA1, FCS_COP.1/HMAC-SHA1-96,
FCS_COP.1/HMAC-SHA256, FCS_COP.1/HMAC-SHA384,
FCS_COP.1/SHA256, FCS_COP.1/SHA384 and
FCS_COP.1/SHA1 are providing the cryptographic functions
required for TLS and SFTP channels. Password-based user
authentication requires password hashing provided by
FCS_COP.1/PBKDF2. FCS_CKM.1/RSA, and
FCS_CKM.1/DH addresses key generation of AES/RSA keys.
FCS_CKM.2 addresses distribution of session keys for AES
keys and the RSA key exchange. FCS_CKM.4/RSA addresses
key destruction of RSA keys.
Note that keys of AES algorithms as a result of the DH key
agreement are created and stored in a trunk of internal memory
dynamically allocated within the TOE upon session
establishment and are destroyed upon session termination
according to FCS_CKM.4/DH. The allocated memory is freed
as well. Random numbers needed for secure communication are
addressed by FCS_RNG.1.
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O.Authentication User authentication is implemented by FIA_UAU.2, supported
by individual user identification in FIA_UID.2. Remote user
authentication by RADIUS as well as authentication via local
database is implemented by FIA_UAU.5. The requirements on
necessary user attributes (passwords) are addressed in
FIA_ATD.1 and the subjects acting on the behalf of that user
are addressed in FIA_USB.1. The authentication mechanism
supports authentication failure handling as addressed in
FIA_AFL.1. For password verification hash values of
passwords are used which are generated using
FCS_COP.1/PBKDF2.
User authentication via RMTs requires the use of a trusted path
according to FTP_ITC.1/TLS and FTP_ITC.1/SFTP.
Termination of a communication channel due to user inactivity
is covered by FTA_SSL.3. Rejection of connections is
addressed by FTA_TSE.1.
O.Authorization User identification is addressed in FIA_UID.2. User IDs and
user levels are bound to management sessions and available for
access control decisions through user-subject binding
(FIA_USB.1). The requirement for access control is spelled out
in FDP_ACC.1, and the access control policies are modeled in
FDP_ACF.1. User-related attributes are spelled out in
FIA_ATD.1 and the subjects acting on the behalf of that user
are spelled out in FIA_USB.1
Security Management is based on the definition of roles as
subject and functions as object as defined in FMT_SMR.1 and
FMT_MOF.1. Requirements on the management functionality
for the definition of access control policies and other security
functions behavior, security attributes, and static attribute
initialization are provided in FMT_MSA.1/ACFATD,
FMT_MSA.1/IFF, FMT_MSA.3/ ACFATD, and
FMT_MSA.3/IFF.
O.Security
Management
The requirements on management of security functions
behavior, security attributes, and static attribute initialization are
provided in FMT_MOF.1, FMT_MSA.1/ACFATD,
FMT_MSA.1/IFF, FMT_MSA.3/ACFATD, FMT_MSA.3/IFF,
and FMT_SMF.1.
The management functionality for the security functions of the
TOE is defined in FMT_SMF.1 and the security user roles are
defined in FMT_SMR.1.
6.3.3 Security Requirements Dependency Rationale
Dependencies within the EAL2 package selected for the security assurance requirements have
been considered by the authors of CC Part 3 and are not analyzed here again.
The security functional requirements in this Security Target do not introduce dependencies on
any security assurance requirement; neither do the security assurance requirements in this
Security Target introduce dependencies on any security functional requirement.
The following table demonstrates the dependencies of SFRs modeled in CC Part 2 and how
the SFRs for the TOE resolve those dependencies.
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Table 6-4 Dependencies between TOE security functional requirements
Security Functional
Requirement
Dependency Resolution
FAU_GEN.1 FPT_STM.1 FPT_STM.1
FAU_GEN.2 FAU_GEN.1
FIA_UID.1
FAU_GEN.1
FIA_UID.2
FAU_SAR.1 FAU_GEN.1 FAU_GEN.1
FAU_SAR.2 FAU_SAR.1 FAU_SAR.1
FAU_STG.1 FAU_GEN.1 FAU_GEN.1
FAU_STG.3 FAU_STG.1 FAU_STG.1
FCS_COP.1/AES [FDP_ITC.1 or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
TLS/SFTP:
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_COP.1/RSA [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
SFTP:
FCS_CKM.1/RSA
FCS_CKM.4/RSA
TLS:
Unsupported: FCS_CKM.1;
FCS_CKM.4
FCS_COP.1/HMAC-SHA1 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_COP.1/HMAC-SHA1-96 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_COP.1/HMAC-SHA256 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_COP.1/HMAC-SHA384 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_COP.1/SHA1 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
Unsupported: FCS_CKM.1,
FCS_CKM.4
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Security Functional
Requirement
Dependency Resolution
FCS_COP.1/SHA256 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
Unsupported: FCS_CKM.1,
FCS_CKM.4
FCS_COP.1/SHA384 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
Unsupported: FCS_CKM.1,
FCS_CKM.4
FCS_COP.1/PBKDF2 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
Unsupported: FCS_CKM.1,
FCS_CKM.4
FCS_CKM.1/DH [FCS_CKM.2 or
FCS_COP.1],
FCS_CKM.4
FCS_CKM.2
FCS_COP.1/AES,
FCS_COP.1/HMAC-SHA1,
FCS_COP.1/HMAC-SHA1-96
FCS_COP.1/HMAC-SHA256,
FCS_COP.1/HMAC-SHA384
FCS_CKM.4/DH
FCS_CKM.1/RSA [FCS_CKM.2 or
FCS_COP.1],
FCS_CKM.4
FCS_COP.1/RSA
FCS_CKM.4/RSA
FCS_CKM.2 [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.4
FCS_CKM.1/DH
FCS_CKM.4/DH
FCS_CKM.4/DH [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.1/DH
FCS_CKM.4/RSA [FDP_ITC.1, or
FDP_ITC.2, or
FCS_CKM.1]
FCS_CKM.1/RSA
FCS_RNG.1 No Dependencies None
FDP_ACC.1 FDP_ACF.1 FDP_ACF.1
FDP_ACF.1 FDP_ACC.1
FMT_MSA.3
FDP_ACC.1
FMT_MSA.3
FDP_IFC.1 FDP_IFF.1 FDP_IFF.1
FDP_IFF.1 FDP_IFC.1
FMT_MSA.3
FDP_IFC.1
FMT_MSA.3
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Security Functional
Requirement
Dependency Resolution
FIA_AFL.1 FIA_UAU.1 FIA_UAU.2
FIA_ATD.1 No Dependencies None
FIA_UAU.2 FIA_UID.1 FIA_UID.2
FIA_UAU.5 No Dependencies None
FIA_UID.2 No Dependencies None
FIA_USB.1 FIA_ATD.1 FIA_ATD.1
FMT_MOF.1 FMT_SMF.1
FMT_SMR.1
FMT_SMF.1
FMT_SMR.1
FMT_MSA.1/ACFATD [FDP_ACC.1 or
FDP_IFC.1]
FMT_SMR.1
FMT_SMF.1
FDP_ACC.1
FDP_IFC.1
FMT_SMR.1
FMT_SMF.1
FMT_MSA.1/IFF [FDP_ACC.1 or
FDP_IFC.1]
FMT_SMR.1
FMT_SMF.1
FDP_ACC.1
FDP_IFC.1
FMT_SMR.1
FMT_SMF.1
FMT_MSA.3/ACFATD FMT_MSA.1
FMT_SMR.1
FMT_MSA.1/ACFATD
FMT_SMR.1
FMT_MSA.3/IFF FMT_MSA.1
FMT_SMR.1
FMT_MSA.1/IFF
FMT_SMR.1
FMT_SMF.1 No Dependencies None
FMT_SMR.1 FIA_UID.1 FIA_UID.2
FPT_STM.1 No Dependencies None
FTA_SSL.3 No Dependencies None
FTA_TSE.1 No Dependencies None
FTP_ITC.1/TLS No Dependencies None
FTP_ITC.1/SFTP No Dependencies None
6.3.4 Justification for unsupported dependencies
The following dependencies are unsupported for the reasons given below.
FCS_COP.1/SHA1, FCS_COP.1/SHA256, FCS_COP.1/SHA384, FCS_COP.1/PBKDF2:
Hash functions do not require keys, so FDP_ITC.1, FDP_ITC.2, FCS_CKM.1, and
FCS_CKM.4 are not applicable.
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FCS_CKM.1/RSA: The key of RSA in TLS is obtained from the TLS certificate, so
FDP_ITC.1, FDP_ITC.2, FCS_CKM.1, and FCS_CKM.4 are not applicable.
6.4 Security Assurance Requirements
The security assurance requirements for the TOE are the Evaluation Assurance Level 2, as
specified in [CC] Part 3. No operations are applied to the assurance components.
6.5 Security Assurance Requirements Rationale
The evaluation assurance level 2 has been chosen commensurate with the threat environment
that is experienced by typical consumers of the TOE.
Dependencies within the EAL package selected (EAL2) for the security assurance require-
ments have been considered by the authors of CC Part 3 and are therefore not analyzed here.
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7 TOE Summary Specification
This chapter identifies and describes how the Security Functional Requirements identified
above are met by the TOE.
7.1 Authentication
The TOE can identify users based on unique IDs and enforce their authentication before
granting them access to any TSF management interfaces. Detailed functions include:
 Support authentication via local passwords. This function is achieved by comparing user
information input with pre-defined user information stored in the flash. The pre-defined
user information (reference data) is the user password hashed using the PBKDF2
(HMAC-SHA256) function as defined in the 'Cryptographic Functions' TOE Security
Function. Passwords have a length of 16 characters. The TOE enforces a password
complexity policy of at least contains three types of the following character types: capital
letter, small letter, number, and special character.
 Support authentication via the remote RADIUS authentication server. The TOE hands
identification and authentication information provided by the user during login to the
RADIUS server and enforces the RADIUS server’s pass/fail decision.
 Support authenticated user logins using the TLS mode.
 Support logout when no operation is performed on the user session within a specified
interval. If an account that has logged in does not exchange information with the TOE
within the specified interval, it will be automatically logged out. The account needs to be
authenticated again for a new login. By default, the inactivity period is 60 minutes.
 Support maximum attempts for authentication failures within certain period of time. By
default, after five consecutive login attempts using one account fail and the interval
between two attempts is shorter than 3 minutes, the account is locked. An alarm is
reported after the account is locked. The default value of lock period is 15 minutes, the
configurable range is between 1 and 1000 minutes. So the user account will be
automatically unlocked after 15 minutes by default.
 Support access limit by IP-based ACL. A series of whitelists and blacklists are set to
filter IP addresses and data on ports. Unauthorized IP addresses and communication
ports cannot access the system.
 Support for user individual attributes including the user ID, user level, and password to
ensure that each user is unique in the system.
 Using the SFTP application requires Administrator users to unlock the private RSA key
for SFTP first with the key’s passphrase. When the key is generated, the Administrator is
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allowed to set a passphrase of 12 to 16 characters. The passphrase complexity
requirements are the same as for user passwords.
(FIA_AFL.1, FIA_ATD.1, FIA_UAU.2, FIA_UAU.5, FIA_UID.2, FIA_USB.1,
FCS_COP.1/PBKDF2, FTA_TSE.1, FTA_SSL.3)
Table 7-1 SFR to TSF mapping
SFR TSF
FIA_AFL.1 Support maximum attempts for authentication failures
within certain period of time. By default, after five
consecutive login attempts using one account fail and the
interval between two attempts is shorter than 3 minutes, the
account is locked. An alarm is reported after the account is
locked.
FIA_ATD.1
FIA_USB.1
Support authentication via local passwords. This function
is achieved by comparing user information input with
pre-defined user information stored in the flash.
Passwords have a length of 16 characters. The TOE
enforces a password complexity policy of at least contains
three types of the following character types: capital letter,
small letter, number, and special character.
Support logout when no operation is performed on the user
session within a specified interval. If an account that has
logged in does not exchange information with the TOE
within the specified interval, it will be automatically
logged out. The account needs to be authenticated again for
a new login. By default, the inactivity period is 60 minutes.
Support maximum attempts for authentication failures
within certain period of time. By default, after five
consecutive login attempts using one account fail and the
interval between two attempts is shorter than 3 minutes, the
account is locked. An alarm is reported after the account is
locked.
Using the SFTP application requires Administrator users to
unlock the private RSA key for SFTP first with the key’s
passphrase. When the key is generated, the Administrator
must set a passphrase of 12 to 16 characters. The
passphrase complexity requirements are the same as for
user passwords.
Support for user individual attributes including the user ID,
user level, and password to ensure that each user is unique
in the system.
FIA_UAU.2 The TOE enforces that every user needs to successfully
authenticate himself by username and password before he
can use any TOE security function other than the
identification and authentication function.
The TOE provides two session establishment mechanisms
requiring identification and authentication of users: via
MML commands for file uploads and downloads over
SFTP and via QX commands for all other administrative
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activities.
FIA_UAU.5 Support authentication via local passwords. This function
is achieved by comparing user information input with
pre-defined user information stored in the flash.
Support authentication via the remote RADIUS
authentication server. The TOE hands identification and
authentication information provided by the user during
login to the RADIUS server and enforces the RADIUS
server’s pass/fail decision.
FIA_UID.2 The TOE enforces that every user is successfully identified
by username when providing username and password for
authentication before he can use any TOE security function
other than the identification and authentication function.
FCS_COP.1/PBKDF2 The pre-defined user information (reference data) is the
user password hashed using the PBKDF2
(HMAC-SHA256) function as defined in the
'Cryptographic Functions' TOE Security Function.
FTA_TSE.1 Support access limit by IP-based ACL. A series of
whitelists and blacklists are set to filter IP addresses and
data on ports. Unauthorized IP addresses and
communication ports cannot access the system.
Support authenticated user logins using the TLS mode.
FTA_SSL.3 Support logout when no operation is performed on the user
session within a specified interval. If an account that has
logged in does not exchange information with the TOE
within the specified interval, it will be automatically
logged out. The account needs to be authenticated again for
a new login. By default, the inactivity period is 60 minutes.
7.2 Authorization
The TOE enforces an access control by supporting following functions:
 There are five hierarchical user groups (from low to high): monitor, operator,
maintenance, administrator and super administrator.
 A user group is assigned to each account.
 Accounts are managed in groups. When an account is created, it is authorized to perform
certain operations and is not allowed to perform unauthorized operations. If an account is
used to attempt any unauthorized operation, an error message is displayed and the
attempt is audited. The authority of each user group is specified in table 1-2.
 Every management command has a command level associated to it. A user can use this
command if his user level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level. User groups match to command
levels as follows:
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Table 7-2 Correspondence of user groups and command levels
User group Command Level
Monitor Monitor
Operate Monitor
Operate
Maintenance Monitor
Operate
Maintenance
Administrator Monitor
Operate
Maintenance
Manage
Super Administrator Monitor
Operate
Maintenance
Manage
Debug
 In order to prevent possible privilege escalations, users can change user attributes (esp.
their own attributes) only for users up to their own user level and cannot increase the
user level attribute beyond their own user level. Command levels cannot be changed by
users.
 Both administrator and super administrator accounts belong to the administrator level
and both have the privilege to create other administrator or super administrator accounts.
The super administrator is a special administrator (expert role for equipment diagnoses
and maintenance) that can execute the debugging commands. Only Administrators and
Super administrators can query and dump operation logs and security logs.
(FDP_ACC.1, FDP_ACF.1, FMT_MOF.1, FMT_MSA.1/ACFATD, FMT_MSA.1/IFF,
FMT_MSA.3/ACFATD, FMT_MSA.3/IFF, FMT_SMF.1, FMT_SMR.1)
Table 7-3 SFR to TSF mapping
SFR TSF
FDP_ACC.1 Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 1-2.
In order to prevent possible privilege escalations, users can
change user attributes (esp. their own attributes) only for
users up to their own user level and cannot increase the
user level attribute beyond their own user level. Command
levels cannot be changed by users.
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FDP_ACF.1 There are five hierarchical user groups (from low to high):
monitor, operator, maintenance, administrator and super
administrator.
A user group is assigned to each account.
Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 1-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_MOF.1 Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 1-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_MSA.1/ACFATD
FMT_MSA.1/IFF
FMT_MSA.3/ACFATD
FMT_MSA.3/IFF
FMT_SMF.1
Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 1-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
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hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_SMR.1 There are five hierarchical user groups (from low to high):
monitor, operator, maintenance, administrator and super
administrator.
A user group is assigned to each account.
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
7.3 Auditing
The TOE provides an audit trail consisting of operation logs and security logs:
 Support recording non-query operations in the operation logs, including the operation
type (if applicable), operation object (if applicable), access IP address (if applicable),
date and time, the outcome, and user name (if applicable).
 Support recording security-related configuration operations in the security logs,
including user management, security settings, and the attempts of unauthorized
operations. The security logs provide the information about the account name, address of
the client, date and time, operation, and outcome.
 For all audit events the corresponding timestamp will be recorded together with the
event.
 Only Administrators and Super administrators can query and dump operation logs and
security logs, and the Administrators and Super administrators can know that whoever
accesses and logins the system and any operation on the system according to the content
of the security log and the operation log.
 The operation logs and security logs allow no manual changes.
 The operation logs and security logs can be completely recovered even after a
power-outage restart of the system.
 The operation logs and security logs keep records in time sequence. After the memory is
exhausted, the earliest records of the logs are overwritten by the latest records. Once the
memory is exhausted, a performance event is reported.
(FAU_GEN.1, FAU_GEN.2, FAU_SAR.1, FAU_SAR.2, FAU_STG.1, FAU_STG.3)
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Table 7-4 SFR to TSF mapping
SFR TSF
FAU_GEN.1 Support recording non-query operations in the operation
logs, including the operation type, operation object, access
IP address, date and time, the outcome, and user name.
Support recording security-related configuration operations
in the security logs, including user management, security
settings, and the attempts of unauthorized operations. The
security logs provide the information about the account
name, address of the client, date and time, operation, and
outcome.
For all audit events the corresponding timestamp will be
recorded together with the event.
FAU_GEN.2 Support recording non-query operations in the operation
logs, including the operation type, operation object, access
IP address, date and time, the outcome, and user name.
FAU_SAR.1
FAU_SAR.2
Only Administrators and Super administrators can query
and dump operation logs and security logs. So only the
Administrators and Super administrators can know that
whoever accesses and logins the system and any operation
on the system according to the content of the security log
and the operation log.
FAU_STG.1 The operation logs and security logs allow no manual
changes.
FAU_STG.3 The operation logs and security logs can be completely
recovered even after a power-outage restart of the system.
The operation logs and security logs keep records in time
sequence. After the memory is exhausted, the earliest
records of the logs are overwritten by the latest records.
Once the memory is exhausted, a performance event is
reported.
7.4 Communication Security
The TOE provides communication security by implementing trusted channels between the
EMS and the TOE using the TLS communication protocol. The TLS1.1 and TLS1.2 protocols
are implemented to provide communication channels. The TOE acts as a TLS server and
allows other trusted IT products to initiate communication. The TLS certificates for server
authentication are managed and issued by users. The TOE supports TLS certificate loading
and activation. Client authentication is performed password-based on the application layer.
The TOE has been loaded with a preset TLS certificate before delivery. If the
below-mentioned TLS_RSA ciphers are used, the RSA public key is used for authentication
and key exchange. Using the below TLS_DHE ciphers the standard Diffie-Hellman
parameters P and G.
The following TLS ciphers are supported by the TOE, for details of the ciphers, please refer to
chapter 7.8:
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 TLS_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
 TLS_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
 TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
 TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
 TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
 TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
The TOE provides communication security by establishing a trusted channel for secure file
transfer based on the SSH(SFTP) protocol. The TOE acts as a SFTP client which initiates
communication with other trusted IT products. The SSH/SFTP-based communication is based
on the following algorithms and ciphers, for details of the cipher, please refer to chapter 7.8:
 Authentication can be performed either public key-based or password-based as
described in RFC 4252.
 Key exchange is performed using diffie-hellman-group 14-sha1
 The public key algorithm of the SSH transport implementation is ssh-rsa.
 For data encryption AES128-CTR, AES192-CTR and AES256-CTR are supported.
 For data integrity protection HMAC-SHA1, HMAC-SHA1-96 are supported.
The TOE supports session time-out after a configurable time of user inactivity. After the
session has expired, the equipment user account will be automatically logged out.
The TOE supports denying session establishment based on authentication failure (i.e. device
authentication failure for TLS and user authentication as well as device authentication failure
for SFTP).
The TOE supports denying session establishment based on source IP address with is based on
the ACL mechanisms of the Management Traffic Flow Control TOE Security Function.
(FTA_TSE.1, FTP_ITC.1/TLS, FTP_ITC.1/SFTP)
Table 7-5 SFR to TSF mapping
SFR TSF
FTP_ITC.1/TLS The TOE provides communication security by
implementing trusted channels between the EMS and the
TOE using the TLS communication protocol. The TLS1.1
and TLS1.2 protocols are implemented to provide
communication channels. The TOE acts as a TLS server
and allows other trusted IT products to initiate
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communication. The TLS certificates for server
authentication are managed and issued by users. The TOE
supports TLS certificate loading and activation. Client
authentication is performed password-based on the
application layer. The TOE has been loaded with a preset
TLS certificate before delivery. The following TLS ciphers
are supported by the TOE, for details of the cipher, please
refer to chapter 7.8:
TLS_RSA_WITH_AES_128_GCM_SHA256 as defined in
RFC5288
TLS_RSA_WITH_AES_256_GCM_SHA384 as defined in
RFC5288
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as
defined in RFC5288
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 as
defined in RFC5288
TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in
RFC5246
TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in
RFC5246
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as
defined in RFC5246
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as
defined in RFC5246
TLS_RSA_WITH_AES_128_CBC_SHA as defined in
RFC3268
TLS_RSA_WITH_AES_256_CBC_SHA as defined in
RFC3268
TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined
in RFC3268
TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined
in RFC3268
FTP_ITC.1/SFTP The TOE provides communication security by establishing
a trusted channel for secure file transfer based on the
SSH(SFTP) protocol. The TOE acts as a SFTP client which
initiates communication with other trusted IT products. The
SSH/SFTP-based communication is based on the following
algorithms and ciphers, for details of the cipher, please
refer to chapter 7.8:
Authentication can be performed either public key-based or
password-based as described in RFC 4252.
Key exchange is performed using diffie-hellman-group
14-sha1
The public key algorithm of the SSH transport
implementation is ssh-rsa.
For data encryption AES128-CTR, AES192-CTR and
AES256-CTR are supported.
For data integrity protection HMAC-SHA1,
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HMAC-SHA1-96 are supported.
7.5 Management Traffic Flow Control
The TOE uses ACL to deny unwanted network traffic on management interfaces and allow
wanted network traffic on management interfaces.
IP-based ACL is provided to filter traffic flow on management interface by matching all or
some attributes, including the source IP address, destination IP address, IP protocol number,
TCP/UDP source port, and TCP/UDP destination port, and then performs actions such as
permit, or discard accordingly.
(FDP_IFC.1, FDP_IFF.1, FTA_TSE.1)
Table 7-6 SFR to TSF mapping
SFR TSF
FDP_IFC.1 The TOE uses ACL to deny unwanted network traffic on
management interfaces and allow wanted network traffic
on management interfaces.
FDP_IFF.1 IP-based ACL is provided to filter traffic flow on
management interface by matching all or some attributes,
including the source IP address, destination IP address, IP
protocol number, TCP/UDP source port, and TCP/UDP
destination port, and then performs actions such as permit,
or discard accordingly.
FTA_TSE.1 IP-based ACL is provided to filter traffic flow on
management interface by matching all or some attributes,
including the source IP address, destination IP address, IP
protocol number, TCP/UDP source port, and TCP/UDP
destination port, and then performs actions such as permit,
or discard accordingly, thus being able to deny session
establishment based on those criteria.
7.6 Security Management
The TOE allows management of the equipment network by different users. The TOE can be
configured to grant each user the access right to the equipment network resources that are
required for user operations. The functions mainly include:
 User management, including the user name and passwords.
 Access control management, including the association of users and corresponding
privileged functionalities.
 Enabling/disabling of TLS for the communication between EMS and the TOE.
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 Definition of IP addresses and address ranges for clients and server that are allowed to
connect to the TOE.
 Set-up and modification of ACL policy.
All of these management options are generally available via the EMS.
Detailed functions mainly include:
 Support remote TOE management using TLS.
 Support automatic account logout when no operation is performed on the user session
within a specified interval.
 Support the maximum attempts for authentication failures within certain period of time.
 Support ACL filtering based on IP protocol number, source and/or destination IP address,
or source and/or destination port.
 Support the address configuration of the RADIUS server.
 Support the address configuration of the Syslog server.
 Support the address configuration of the NTP server.
 Support the address configuration of the SFTP server.
 Support setting the time information on the TOE.
The TOE management can use two kinds of sessions for administrative activities based on
different protocols:
 QX is a proprietary interface between EMS and TOE. EMS uses QX commands to
implement OAM (Operation Administration and Maintenance) function on TOE. The
TOE provides abundant QX commands to allow the users to manage the TOE.
 MML commands are used mainly for local maintenance tasks like fault location and
software upgrades. For this evaluation, MML commands are used to up- and
download files via the TOE’s SFTP client.
Note that users cannot have QX and MML sessions at the same time.
(FMT_SMF.1, FMT_MSA.1/IFF, FMT_MSA.3/IFF)
Table 7-7 SFR to TSF mapping
SFR TSF
FMT_SMF.1
FMT_MSA.1/IFF
The TOE allows management of the telecommunications
network by different users. The TOE can be configured to
grant each user the access right to the telecommunications
network resources that are required for user operations.
The functions mainly include:
User management, including the user name and passwords.
Access control management, including the association of
users and corresponding privileged functionalities.
Enabling/disabling of TLS for the communication between
EMS and the TOE.
Definition of IP addresses and address ranges for clients
and server that are allowed to connect to the TOE.
Set-up and modification of ACL policy.
All of these management options are generally available
via the EMS.
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Detailed functions mainly include:
Support remote TOE management using TLS.
Support SFTP enable and disable.
Support automatic account logout when no operation is
performed on the user session within a specified interval.
Support the maximum attempts for authentication failures
within certain period of time.
Support configuration of the RADIUS server.
Support configuration of the Syslog server.
Support configuration of the NTP server.
Support configuration of the SFTP server.
Support setting the time information on the TOE.
FMT_MSA.3/IFF The ACL filtering mechanism is enforcing the
Management Network Filtering SFP. By default, no ACL
rules are configured therefore all traffic will be allowed to
pass. Administrators and Super-Administrators can add,
delete and modify ACL rules. The ACL rules will take
effect immediately after they are added. The ACL filtering
mechanism does only accept connections that are explicitly
permitted in the ACL filtering rules. By adding
corresponding ACL rules, Administrators and
Super-Administrators can change the default behavior
where all traffic is allowed to pass.
7.7 Time
The TOE provides its own clock and timestamps to correctly record logs in time sequence or
other place wherever the time shall be used. The time information on the TOE can either be
set by a user with sufficient access rights on the device or obtained from external NTP time
sources.
(FPT_STM.1)
Table 7-8 SFR to TSF mapping
SFR TSF
FPT_STM.1 The TOE provides its own clock and timestamps to
correctly record logs in time sequence or other place
wherever the time shall be used. The time information on
the TOE can either be set by a user with sufficient access
rights on the device or obtained from external NTP time
sources.
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7.8 Cryptographic functions
Cryptographic functions are required by security features as dependencies. The following
cryptographic algorithms are supported:
1) The TOE supports symmetric encryption and decryption using the AES algorithm. The TOE
support the following algorithms.
GCM mode, and cryptographic key sizes 256bits that meet the following: [FIPS 197], [NIST
SP 800-38D]
GCM mode, and cryptographic key sizes 128bits that meet the following: [FIPS 197], [NIST
SP 800-38D]
CTR mode, and cryptographic key sizes 128bits that meet the following: [FIPS 197], [NIST
SP 800-38A]
CTR mode, and cryptographic key sizes 192bits that meet the following: [FIPS 197], [NIST
SP 800-38A]
CTR mode, and cryptographic key sizes 256bits that meet the following: [FIPS 197], [NIST
SP 800-38A]
CBC mode, and cryptographic key sizes 256bits that meet the following: [FIPS 197], [NIST
SP 800-38A]
CBC mode, and cryptographic key sizes 128bits that meet the following: [FIPS 197], [NIST
SP 800-38A]
AES-128/192/256 in CTR mode is used for encryption and decryption within SSH
communication.
AES-128/256 in GCM mode is used for encryption and decryption within TLS
communication.
AES-128/256 in CBC mode is used for encryption and decryption within TLS
communication.
2) The TOE supports asymmetric authentication using the RSA algorithm according to [PKCS#1
V2.1], RSASSA-PKCS1-v1_5 with a key length of 2048 to 4096bits for SSH\TLS.
3) The TOE supports data integrity generation and verification using the HMAC-SHA1
(HMAC-SHA1-96) algorithm according to [RFC 2104], [FIPS 198-1] using key lengths of
160 (truncated to 96) bits. The data integrity protection mechanism is used as integrity
protection for SSH communication.
4) The TOE supports keyed-hash message authentication using the HMAC-SHA256 and
HMAC-SHA384 algorithm according to [FIPS 180-4]. This mechanism is used for the TLS
communication. For all cipher suites defined in [RFC 5246] and [RFC 3268] it is used
especially for data integrity protection. (For the remaining cipher suites defined in [RFC 5288]
the mechanism is used according to [RFC 5288].)
5) SHA-256 and SHA-384 are used in TLS communication as hashing function.
6) The TOE supports hashing of data using PBKDF2 (HMAC-SHA256) algorithm according to
[RFC2898] for password hashing. The iteration number is 10000. The salt used in PBKDF2 is
a 16 byte size random number obtained from the TOE’s deterministic random number
generator. The TOE supports hashing of data using SHA1 according to [FIPS180-3] for SSH
communication.
7) The TOE supports generation and distribution of cryptographic keys according to
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diffie-hellman-group14-sha1 and specified cryptographic key sizes 2048 bits according to
[NIST SP 800-56A], [RFC 4253], [RFC 3526], [PKCS#3] for SSH/TLS.
8) The TOE supports key generation for the RSA algorithm according to [FIPS 186-4] using CRT
and adapting the method in [FIPS 186-4] Appendix B.3.3 and RSA key exchange according to
[NIST SP 800-56B]. RSA keys generated have a key length of 2048 to 4096bits and are
intended for usage with RSASSA-PKCS1-V1_5.
9) The TOE supports destruction of temporary session keys used for secure communication
channels based on TLS or SFTP which are stored in volatile memory by erasing the
corresponding area in memory reserved for the corresponding session. So the session keys are
destroyed by the post-processing routines of the underlying trusted channel which are
executed whenever a session is terminated for any reason.
10) The TOE supports the destruction of RSA private keys through full flash erase by overwriting
with '1'. The destruction mechanism can only be executed after correct setting of a physical
DIP switch that prevents accidental erase of the flash memory during normal operation.
11) The TOE supports the SSH protocol according to [RFC 4251], [RFC 4252], [RFC 4253],
[RFC 4254] and the following cipher suites according to [RFC 4253]:
 Diffie-hellman-group14-sha1 as key exchange algorithm of SSH.
 AES-128-CTR/ AES-192-CTR/ AES-256-CTR encryption and decryption algorithm.
 RSA (2048 to 4096 bits) according to [PKCS#1 V2.1], RSASSA-PKCS1-V1_5 for
asymmetric authentication of the TOE (client) to the server.
 HMAC-SHA1/ HMAC-SHA1-96 data integrity generation and verification algorithm.
12) The operations have been performed according to chap. 4.8 of [AIS20]. For certified use of the
TOE, the random seed of 32 bytes shall contain at least 128 bit entropy. The seed value is
provided by the hardware TPM chip integrated in the SCC. The TOE ensures that TLS-based
communication and SSH-based communication cannot be enabled before the DRNG is
seeded.
The DRNG complies with [NIST SP 800-90A] using HMAC-DRBG (SHA-256).
(FCS_COP.1/AES, FCS_COP.1/RSA, FCS_COP.1/HMAC-SHA1,
FCS_COP.1/HMAC-SHA1-96, FCS_COP.1/HMAC-SHA256, FCS_COP.1/HMAC-SHA384,
FCS_CKM.1/DH, FCS_COP.1/SHA256, FCS_COP.1/SHA384, FCS_COP.1/PBKDF2,
FCS_COP.1/SHA1, FCS_CKM.1/RSA, FCS_CKM.2, FCS_CKM.4/RSA, FCS_RNG.1)
Table 7-9 SFR to TSF mapping
SFR TSF
FCS_COP.1/AES The TOE supports symmetric encryption and decryption using
the AES algorithm. The TOE supports the following algorithms.
GCM mode, and cryptographic key sizes 256bits that meet the
following: [FIPS 197], [NIST SP 800-38D]
GCM mode, and cryptographic key sizes 128bits that meet the
following: [FIPS 197], [NIST SP 800-38D]
CTR mode, and cryptographic key sizes 128bits that meet the
following: [FIPS 197], [NIST SP 800-38A]
CTR mode, and cryptographic key sizes 192bits that meet the
following: [FIPS 197], [NIST SP 800-38A]
CTR mode, and cryptographic key sizes 256bits that meet the
following: [FIPS 197], [NIST SP 800-38A]
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CBC mode, and cryptographic key sizes 256bits that meet the
following: [FIPS 197], [NIST SP 800-38A]
CBC mode, and cryptographic key sizes 128bits that meet the
following: [FIPS 197], [NIST SP 800-38A]
AES-128/192/256 in CTR mode is used for encryption and
decryption within SSH communication.
AES-128/256 in GCM mode is used for encryption and
decryption within TLS communication.
AES-128/256 in CBC mode is used for encryption and
decryption within TLS communication.
FCS_COP.1/RSA The TOE supports asymmetric authentication using the RSA
algorithm according to [PKCS#1 V2.1], RSASSA-PKCS1-v1_5
with a key length of 2048 to 4096bits for SSH\TLS.
FCS_COP.1/HMAC-S
HA1
FCS_COP.1/HMAC-S
HA1-96
The TOE supports data integrity generation and verification
using the HMAC-SHA1 (HMAC-SHA1-96) algorithm
according to [RFC 2104], [FIPS 198-1] using key lengths of
160 (truncated to 96) bits. The data integrity protection
mechanism is used as integrity protection for SSH
communication.
FCS_COP.1/HMAC-S
HA256
FCS_COP.1/HMAC-S
HA384
The TOE supports keyed-hash message authentication using the
HMAC-SHA256 and HMAC-SHA384 algorithm according to
[FIPS180-4]. This mechanism is used for the TLS
communication. For all cipher suites defined in [RFC 5246] and
[RFC 3268] it is used especially for data integrity protection.
(For the remaining cipher suites defined in [RFC 5288] the
mechanism is used according to [RFC 5288].)
FCS_CKM.1/DH The TOE supports generation and distribution of cryptographic
keys according to diffie-hellman-group14-sha1 and specified
cryptographic key sizes 2048 bits according to [NIST SP
800-56A], [RFC 4253], [RFC 3526], [PKCS#3] for SSH/TLS.
FCS_COP.1/SHA256 HMAC-DRBG using SHA-256 as its hash function
FCS_COP.1/SHA384 SHA256 and SHA384 are used in TLS communication as
hashing function.
FCS_COP.1/PBKDF2 The TOE supports hashing of data using PBKDF2
(HMAC-SHA256) algorithm according to [RFC2898] for
password hashing. The iteration number is 10000. The salt used
in PBKDF2 is a 16 byte size random number obtained from the
TOE’s deterministic random number generator.
FCS_COP.1/SHA1 The TOE supports hashing of data using SHA1 according to
[FIPS180-3] for SSH communication.
FCS_CKM.1/RSA The TOE supports key generation for the RSA algorithm
according to [FIPS 186-4] using CRT and adapting the method
in [FIPS 186-4] Appendix B.3.3. RSA keys generated have a
key length of 2048 to 4096bits and are intended for usage with
RSASSA-PKCS1-V1_5.
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FCS_CKM.2 The TOE supports generation and distribution of cryptographic
keys according to diffie-hellman-group14-sha1 and specified
cryptographic key sizes 2048 bits according to [NIST SP
800-56A], [RFC 4253], [RFC 3526], [PKCS#3] for SSH/TLS
and RSA key exchange according to [NIST SP 800-56B].
FCS_CKM.4/DH The TOE supports destruction of temporary session keys used
for secure communication channels based on TLS or SFTP
which are stored in volatile memory by erasing the
corresponding area in memory reserved for the corresponding
session. So the session keys are destroyed by the
post-processing routines of the underlying trusted channel
which are executed whenever a session is terminated for any
reason.
FCS_CKM.4/RSA The TOE supports the destruction of RSA private keys through
full flash erase by overwriting with '1'. The destruction
mechanism can only be executed after correct setting of a
physical DIP switch that prevents accidental erase of the flash
memory during normal operation.
FCS_RNG.1 The operations have been performed according to chap. 4.8 of
[AIS20]. For certified use of the TOE, the random seed of 32
bytes shall contain at least 128 bit entropy. The seed value is
provided by the hardware TPM chip integrated in the SCC. The
TOE ensures that TLS-based communication and SSH-based
communication cannot be enabled before the DRNG is seeded.
The DRNG complies with [NIST SP 800-90A] using
HMAC-DRBG (SHA-256).
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A Abbreviations, Terminology and
References
A.1 Abbreviations
CC Common Criteria
DCN Data Communications Network (the management network)
EMS Element Management System
LCT Local Craft Terminal
LMT Local Maintenance Terminal
MSTP Multi-Service Transmission Platform
OSN Optical Switch Node
OTN Optical Transport Network
PP Protection Profile
RADIUS Remote Authentication Dial-In User Service
RMT Remote Maintenance Terminal
RSA Rivest Shamir Adleman
SDH Synchronous Digital Hierarchy
SFR Security Functional Requirement
SFTP Secure File Transfer Protocol
SSH Secure Shell
ST Security Target
TLS Transport Layer Security
TOE Target of Evaluation
TSF TOE Security Functions
WDM Wavelength Division Multiplexing
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A.2 Terminology
This section contains definitions of technical terms that are used with a meaning specific to
this document. Terms defined in the [CC] are not reiterated here, unless stated otherwise.
Administrator: An administrator in the content is the user of administrator group or super
administrator group
User: A user is a human or a product/application using the TOE.
A.3 References
[CC] Common Criteria for Information Technology Security Evaluation, Part
1-3, Version 3.1 Revision 5, April 2017
[CEM] Common Methodology for Information Technology Security Evaluation,
Evaluation methodology, Version 3.1 Revision 5, April 2017
[AIS20] Functionality Classes and Evaluation Methodology for Deterministic
Random Number Generators, Version 2.0, 2 December 1999
[FIPS 180-3] FIPS PUB 180-3 – Secure Hash Standard (SHS), Octo, August 2015ber
2008
[FIPS 180-4] FIPS PUB 180-4 – Secure Hash Standard (SHS)
[FIPS 186-4] FIPS PUB 186-4 – Digital Signature Standard (DSS), July 2013
[FIPS 197] FIPS PUB 197 – Advanced Encryption Standard (AES), November 26,
2001
[FIPS 198-1] FIPS PUB 198-1 - The Keyed-Hash Message Authentication Code
(HMAC), July 2008
[NIST SP 800-38A] NIST Special Publication 800-38A – Recommendation for Block
Cipher Modes of Operation: Methods and Techniques, December 2001
[NIST SP 800-38D] NIST Special Publication 800-38A – Recommendation for Block
Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC,
November 2007
[NIST SP 800-56A] NIST Special Publication 800-56A – Recommendation for Pair-Wise
Key Establishment Schemes Using Discrete Logarithm Cryptography,
May 2013
[NIST SP 800-56B] NIST Special Publication 800-56B Rev. 1 – Recommendation for
Pair-Wise Key-Establishment Schemes Using Integer Factorization
Cryptography, September 2014
[NIST SP 800-90A] NIST Special Publication 800-90A Rev. 1 - Recommendation for
Random Number Generation Using Deterministic Random Bit
Generators, June 2015
[PKCS#1 V2.1] PKCS #1 v2.1: RSA Cryptography Standard, April 2004
[PKCS#3] PKCS #3: Diffie-Hellman Key- Agreement Standard, version 1.4,
November 1993
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[RFC 2104] RFC 2104 - HMAC: Keyed-Hashing for Message Authentication,
February 1997
[RFC 2898] RFC 2898 - PKCS #5: Password-Based Cryptography Specification,
version 2.0, September 2000
[RFC 3526] RFC 3526 - More Modular Exponential (MODP) Diffie-Hellman
groups for Internet Key Exchange (IKE), May 2003
[RFC 4251] RFC 4251 – The Secure Shell (SSH) Protocol Architecture, January
2006
[RFC 4252] RFC 4252 - The Secure Shell (SSH) Authentication Protocol, January
2006
[RFC 4253] RFC 4253 - The Secure Shell (SSH) Transport Layer Protocol, January
2006
[RFC 4254] RFC 4254 - The Secure Shell (SSH) Connection Protocol, January 2006
[RFC 4346] RFC 4346 - The Transport Layer Security (TLS) Protocol Version 1.1,
April 2006
[RFC 5246] RFC 5246 - The Transport Layer Security (TLS) Protocol Version 1.2,
August 2008