National Information Assurance Partnership
Common Criteria Evaluation and Validation Scheme
Validation Report
DataSoft Secure Tactical VPN Client for Android
Report Number: CCEVS-VR-VID11396-2023
Dated: August 14, 2023
Version: 1.0
National Institute of Standards and Technology Department of Defense
Information Technology Laboratory ATTN: NIAP, Suite 6982
100 Bureau Drive 9800 Savage Road
Gaithersburg, MD 20899 Fort Meade, MD 20755-6982
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ACKNOWLEDGEMENTS
Validation Team
Randy Heimann
Lisa Mitchell
Linda Morrison
Clare Parran
Lori Sarem
Common Criteria Testing Laboratory
Raymond Smoley
Yoel Fortaleza
Gossamer Security Solutions, Inc.
Columbia, MD
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Table of Contents
1 Executive Summary............................................................................................................1
2 Identification.......................................................................................................................2
3 Assumptions & Clarification of Scope...............................................................................3
4 Architectural Information...................................................................................................4
4.1 TOE Evaluated Platforms...........................................................................................4
4.2 TOE Architecture .......................................................................................................4
4.3 Physical Boundaries ...................................................................................................4
5 Security Policy....................................................................................................................5
5.1 Cryptographic support................................................................................................5
5.2 User data protection....................................................................................................5
5.3 Identification and authentication ................................................................................5
5.4 Security management .................................................................................................5
5.5 Privacy........................................................................................................................5
5.6 Protection of the TSF..................................................................................................6
5.7 Trusted path/channels.................................................................................................6
6 Documentation ...................................................................................................................7
7 IT Product Testing..............................................................................................................8
7.1 Developer Testing ......................................................................................................8
7.2 Evaluation Team Independent Testing.......................................................................8
8 Results of the Evaluation....................................................................................................9
8.1 Evaluation of the Security Target (ASE)....................................................................9
8.2 Evaluation of the Development (ADV)......................................................................9
8.3 Evaluation of the Guidance Documents (AGD).........................................................9
8.4 Evaluation of the Life Cycle Support Activities (ALC)...........................................10
8.5 Evaluation of the Test Documentation and the Test Activity (ATE).......................10
8.6 Vulnerability Assessment Activity (VAN) ..............................................................10
8.7 Summary of Evaluation Results ...............................................................................11
9 Validator Comments/Recommendations..........................................................................12
10 Annexes ............................................................................................................................13
11 Security Target .................................................................................................................14
12 Glossary............................................................................................................................15
13 Bibliography.....................................................................................................................16
List of Tables
Table 1: Evaluation Identifiers ...................................................................................................2
Table 2: Evaluated Platforms .....................................................................................................4
Table 3: Glossary......................................................................................................................15
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1 Executive Summary
This report documents the assessment of the National Information Assurance Partnership
(NIAP) Validation team of the evaluation of DataSoft Secure Tactical VPN Client for Android
solution provided by DataSoft Corporation. It presents the evaluation results, their
justifications, and the conformance results. This Validation Report is not an endorsement of the
Target of Evaluation by any agency of the U.S. government, and no warranty is either expressed
or implied.
The evaluation was performed by the Gossamer Security Solutions (Gossamer) Common
Criteria Testing Laboratory (CCTL) in Columbia, MD, United States of America, and was
completed in August 2023. The information in this report is largely derived from the Evaluation
Technical Report (ETR) and associated test reports, all written by Gossamer Security Solutions.
The evaluation determined that the product is both Common Criteria Part 2 Extended and Part
3 Extended, and meets the assurance requirements of the PP-Configuration for Application
Software and Virtual Private Network (VPN) Clients, Version 1.3, 07 April 2023 which
includes the Base PP: Protection Profile for Application Software, Version 1.4, 7 October 2021
(ASPP14) with the PP-Module for Virtual Private Network (VPN) Clients, Version 2.4, 31
March 2022 (VPNC24).
The Target of Evaluation (TOE) is the DataSoft Secure Tactical VPN Client for Android (SW
version 2.3.7). The TOE identified in this Validation Report has been evaluated at a NIAP
approved Common Criteria Testing Laboratory using the Common Methodology for IT
Security Evaluation (Version 3.1, Rev 5) for conformance to the Common Criteria for IT
Security Evaluation (Version 3.1, Rev 5). This Validation Report applies only to the specific
version of the TOE as evaluated. The evaluation has been conducted in accordance with the
provisions of the NIAP Common Criteria Evaluation and Validation Scheme and the
conclusions of the testing laboratory in the evaluation technical report are consistent with the
evidence provided.
The Validation team monitored the activities of the Evaluation team, provided guidance on
technical issues and evaluation processes, and reviewed the individual work units and
successive versions of the ETR. The Validation team found that the evaluation showed that the
product satisfies all of the functional requirements and assurance requirements stated in the
Security Target (ST). Therefore the Validation team concludes that the testing laboratory’s
findings are accurate, the conclusions justified, and the conformance results are correct. The
conclusions of the testing laboratory in the ETR are consistent with the evidence produced.
The technical information included in this report was obtained from the DataSoft Secure
Tactical VPN Client for Android Security Target, Version 0.5, August 7, 2023 and analysis
performed by the Validation team.
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2 Identification
The CCEVS is a joint National Security Agency (NSA) and National Institute of Standards and
Technology (NIST) effort to establish commercial facilities to perform trusted product
evaluations. Under this program, security evaluations are conducted by commercial testing
laboratories called Common Criteria Testing Laboratories (CCTLs) using the Common
Evaluation Methodology (CEM) in accordance with National Voluntary Laboratory
Assessment Program (NVLAP) accreditation.
The NIAP Validation Body assigns Validators to monitor the CCTLs to ensure quality and
consistency across evaluations. Developers of information technology products desiring a
security evaluation contract with a CCTL and pay a fee for their product’s evaluation. Upon
successful completion of the evaluation, the product is added to NIAP’s Validated Products
List.
Table 1 provides information needed to completely identify the product, including:
• The TOE: the fully qualified identifier of the product as evaluated.
• The ST, describing the security features, claims, and assurances of the product.
• The conformance result of the evaluation.
• The Protection Profile to which the product is conformant.
• The organizations and individuals participating in the evaluation.
Item Identifier
Evaluation Scheme United States NIAP Common Criteria Evaluation and Validation Scheme
TOE DataSoft Secure Tactical VPN Client for Android
Protection Profile Protection Profile for Application Software, Version 1.4, 7 October 2021
(ASPP14) and the PP-Module for Virtual Private Network (VPN) Clients, Version
2.4, 31 March 2022 (VPNC24)
ST DataSoft Secure Tactical VPN Client for Android Security Target, Version 0.5,
August 7, 2023
Evaluation Technical
Report
Evaluation Technical Report for DataSoft Secure Tactical VPN Client for
Android, Version 0.4, August 7, 2023
CC Version Common Criteria for Information Technology Security Evaluation, Version 3.1,
rev 5
Conformance Result CC Part 2 Extended, CC Part 3 Extended
Sponsor DataSoft Corporation
Developer DataSoft Corporation
Common Criteria
Testing Lab (CCTL)
Gossamer Security Solutions, Inc.
Columbia, MD
CCEVS Validators Randy Heimann, Lisa Mitchell, Linda Morrison, Clare Parran, Lori Sarem
Table 1: Evaluation Identifiers
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3 Assumptions & Clarification of Scope
Assumptions
The Security Problem Definition, including the assumptions, may be found in the following
documents:
• Protection Profile for Application Software, Version 1.4, 7 October 2021 (ASPP14)
• PP-Module for Virtual Private Network (VPN) Clients, Version 2.4, 31 March 2022
(VPNC24)
That information has not been reproduced here and the ASPP14/VPNC24 should be consulted
if there is interest in that material.
The scope of this evaluation was limited to the functionality and assurances covered in the
ASPP14/VPNC24 as described for this TOE in the Security Target. Other functionality
included in the product was not assessed as part of this evaluation. All other functionality
provided by the devices needs to be assessed separately, and no further conclusions can be
drawn about their effectiveness.
Clarification of scope
All evaluations (and all products) have limitations, as well as potential misconceptions that need
clarification. This text covers some of the more important limitations and clarifications of this
evaluation. Note that:
• As with any evaluation, this evaluation only shows that the evaluated configuration
meets the security claims made with a certain level of assurance (the assurance activities
specified in the Application Software Protection Profile with the VPNC module and
performed by the Evaluation team).
• This evaluation covers only the specific device models and software as identified in this
document, and not any earlier or later versions released or in process.
• Apart from the Admin Guide, additional customer documentation for the specific
Software Application and VPN Client models was not included in the scope of the
evaluation and therefore should not to be relied upon when configuring or operating the
device as evaluated.
• This evaluation did not specifically search for, nor attempt to exploit, vulnerabilities
that were not “obvious” or vulnerabilities to objectives not claimed in the ST. The CEM
defines an “obvious” vulnerability as one that is easily exploited with a minimum of
understanding of the TOE, technical sophistication and resources.
• The functionality evaluated is scoped exclusively to the security functional
requirements specified in the ASPP14/VPNC24 and applicable Technical Decisions.
Any additional security related functional capabilities of the TOE were not covered by
this evaluation.
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4 Architectural Information
Note: The following architectural description is based on the description presented in the
Security Target.
The TOE is the DataSoft Secure Tactical VPN Client for Android (SW version 2.3.7). The
TOE enables remote users within an organization to communicate securely as if their devices
were directly connected to a private network.
The TOE provides IPsec VPN client functionality for Android-based End User Devices (EUD)
running on Android 11, Android 12, and Android 13 mobile devices (or “Platforms”) running
Linux Kernel earlier than v5.6.
The TOE complies with IKEv2 RFCs and can utilize X509v3 certificates for authentication of
an IPsec peer. In a basic IPsec VPN connection, all traffic from the VPN client is encrypted
and sent across the VPN gateway. Administrators can define profiles through the TOE or load
them into a mobile device. Named profiles define the endpoints, authentication data, and
cryptographic characteristics for a VPN connection. Profiles define the cryptographic
configuration of the set of additional cryptographic options.
The TOE can interoperate with IKEv2 VPN Gateways but also includes extensions to route
multicast traffic through the VPN, allowing the TOE to interoperate with DataSoft’s small form
factor Radio Access Point (RAP), which allows mobile and dismounted operators to perform
C2-releated computing functions security across existing tactical communications networks.
4.1 TOE Evaluated Platforms
The TOE was specifically tested on those three different versions of Android using the
following hardware:
Phone Model CPU Kernel Android OS
Samsung S20 Tactical Edition Qualcomm snapdragon 865 (SM8250) 4.19 Android 11
Google Pixel 5 Qualcomm snapdragon 765G (SM7250) 4.19 Android 11
Google Pixel 4a-5G Qualcomm snapdragon 765G (SM7250) 4.19 Android 12
Google Pixel 5a-5G Qualcomm snapdragon 765G (SM7250) 4.19 Android 13
Table 2: Evaluated Platforms
4.2 TOE Architecture
The TOE product consists of a user space application installed as a standard Android APK.
4.3 Physical Boundaries
The TOE consists of a software-only VPN client application. The underlying mobile platform
on which the TOE executes belongs to the IT environment.
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5 Security Policy
This section summaries the security functionality of the TOE:
1. Cryptographic support
2. User data protection
3. Identification and authentication
4. Security management
5. Privacy
6. Protection of the TSF
7. Trusted path/channels
5.1 Cryptographic support
The TOE includes its own cryptographic library that implements approved cryptographic
algorithms that the TOE uses to protect communication between itself and a VPN gateway over
an unprotected network using IPsec. The TOE uses the Platform to protect credential data at
rest.
The TOE platform provides asymmetric cryptography (Android’s user keychain), which is used
by the TOE for IKE peer authentication (using digital signature and hashing services). In
addition, the TOE seeds its DRBG from the Platform.
5.2 User data protection
The TOE ensures that residual information from previously sent network packets processed
through the platform are protected from being passed into subsequent network packets.
5.3 Identification and authentication
The TOE and TOE platform perform device-level X.509 certificate-based authentication of the
VPN Gateway during IKE v2 key exchange. Device-level authentication allows the TOE to
establish a secure channel with a trusted VPN Gateway. The secure channel is established only
after each endpoint successfully authenticates each other.
5.4 Security management
The TOE provides all the interfaces necessary to manage the security functions identified
throughout this Security Target. This includes interfaces to the user as well as to the VPN
gateway. The IPsec VPN is fully configurable by a combination of functions provided directly
by the TOE and those available to the associated VPN gateway. The TOE platform provides
the functions necessary to securely update the TOE.
5.5 Privacy
The TOE does not store or transmit Personally Identifiable Information (PII) over a network.
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5.6 Protection of the TSF
The TOE utilizes its own cryptographic functions to perform self-tests that ensure the TOE’s
integrity and algorithm correctness. The TOE platform provides the functions necessary to
securely update the TOE software.
5.7 Trusted path/channels
The TOE establishes an IPsec trusted channel (which protects the transmitted data from
unauthorized disclosure and modification) with a corresponding VPN gateway.
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6 Documentation
The following documents were available with the TOE for evaluation:
• Secure Tactical VPN Client CC Configuration Guide, Version 1.1, July 26, 2023
Any additional customer documentation provided with the product, or that is available online
was not included in the scope of the evaluation and therefore should not to be relied upon
when configuring or operating the device as evaluated.
To use the product in the evaluated configuration, the product must be configured as specified
in the Guidance Documentation listed above. Consumers are encouraged to download the
configuration guides from the NIAP website to ensure the device is configured as evaluated.
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7 IT Product Testing
This section describes the testing efforts of the developer and the Evaluation Team. It is derived
from information contained in the proprietary Detailed Test Report for Secure Tactical VPN
Client for Android, Version 0.4, August 7, 2023 (DTR), as summarized in the evaluation
Assurance Activity Report (AAR).
7.1 Developer Testing
No evidence of developer testing is required in the assurance activities for this product.
7.2 Evaluation Team Independent Testing
The Evaluation team verified the product according to a Common Criteria Certification
document and ran the tests specified in the ASPP14/VPNC24 including the tests associated
with optional requirements.
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8 Results of the Evaluation
The results of the assurance requirements are generally described in this section and are
presented in detail in the proprietary ETR. The reader of this document can assume that all
assurance activities and work units received a passing verdict.
A verdict for an assurance component is determined by the resulting verdicts assigned to the
corresponding evaluator action elements. The evaluation was conducted based upon CC version
3.1 rev 5 and CEM version 3.1 rev 5. The evaluation determined the Secure Tactical VPN Client
for Android TOE to be Part 2 extended, and to meet the SARs contained in the
ASPP14/VPNC24.
8.1 Evaluation of the Security Target (ASE)
The Evaluation team applied each ASE CEM work unit. The ST evaluation ensured the ST
contains a description of the environment in terms of policies and assumptions, a statement of
security requirements claimed to be met by the DataSoft Secure Tactical VPN Client for
Android products that are consistent with the Common Criteria, and product security function
descriptions that support the requirements.
The Validation team reviewed the work of the Evaluation team, and found that sufficient
evidence and justification was provided by the Evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
8.2 Evaluation of the Development (ADV)
The Evaluation team applied each ADV CEM work unit. The Evaluation team assessed the
design documentation and found it adequate to aid in understanding how the TSF provides the
security functions. The design documentation consists of a functional specification contained
in the Security Target and Guidance documents. Additionally the evaluator performed the
assurance activities specified in the ASPP14/VPNC24 related to the examination of the
information contained in the TSS.
The Validation team reviewed the work of the evaluation team, and found that sufficient
evidence and justification was provided by the Evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
8.3 Evaluation of the Guidance Documents (AGD)
The Evaluation team applied each AGD CEM work unit. The Evaluation team ensured the
adequacy of the user guidance in describing how to use the operational TOE. Additionally, the
Evaluation team ensured the adequacy of the administrator guidance in describing how to
securely administer the TOE. All of the guides were assessed during the design and testing
phases of the evaluation to ensure they were complete.
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The Validation team reviewed the work of the Evaluation team, and found that sufficient
evidence and justification was provided by the evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
8.4 Evaluation of the Life Cycle Support Activities (ALC)
The Evaluation team applied each ALC CEM work unit. The Evaluation team found that the
TOE was identified.
The Validation team reviewed the work of the Evaluation team, and found that sufficient
evidence and justification was provided by the Evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
8.5 Evaluation of the Test Documentation and the Test Activity (ATE)
The Evaluation team applied each ATE CEM work unit. The Evaluation team ran the set of
tests specified by the assurance activities in the ASPP14/VPNC24 and recorded the results in a
Test Report, summarized in the AAR.
The Validation team reviewed the work of the Evaluation team, and found that sufficient
evidence and justification was provided by the evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
8.6 Vulnerability Assessment Activity (VAN)
The Evaluation team applied each AVA CEM work unit. The vulnerability analysis is in the
Detailed Test Report (DTR) prepared by the evaluator. The vulnerability analysis includes a
public search for vulnerabilities. The public search for vulnerabilities did not uncover any
residual vulnerability.
The evaluator searched the National Vulnerability Database
(https://web.nvd.nist.gov/view/vuln/search) and Vulnerability Notes Database
(http://www.kb.cert.org/vuls/) on 7/18/2023 with the following search terms: “DataSoft
Tactical Secure Mobility VPN Client”, “DataSoft Secure Tactical Mobility VPN Client”,
“DataSoft Secure Tactical VPN Client”, “Secure Tactical VPN Client”, “DataSoft VPN
Client”, “DataSoft Corporation”, “DataSoft”, “OpenSSL”, “Strongswan”.
The Validation team reviewed the work of the Evaluation team and found that sufficient
evidence and justification was provided by the Evaluation team to confirm that the evaluation
was conducted in accordance with the requirements of the CEM, and that the conclusion
reached by the Evaluation team was justified.
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8.7 Summary of Evaluation Results
The Evaluation team’s assessment of the evaluation evidence demonstrates that the claims in
the ST are met. Additionally, the Evaluation team’s testing also demonstrated the accuracy of
the claims in the ST.
The Validation team’s assessment of the evidence provided by the evaluation team is that it
demonstrates that the Evaluation team followed the procedures defined in the CEM, and
correctly verified that the product meets the claims in the ST.
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9 Validator Comments/Recommendations
The Validation team notes that the evaluated configuration is dependent upon the TOE being
configured per the evaluated configuration instructions in the Secure Tactical VPN Client CC
Configuration Guide, Version 1.1, July 26, 2023 (AGD). No versions of the TOE and
software, either earlier or later were evaluated.
Please note that the functionality evaluated is scoped exclusively to the security functional
requirements specified in the Security Target. Other functionality included in the product was
not assessed as part of this evaluation. All other functionality provided by devices in the
operational environment need to be assessed separately, and no further conclusions can be
drawn about their effectiveness.
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10 Annexes
Not applicable.
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11 Security Target
The Security Target is identified as: DataSoft Secure Tactical VPN Client for Android Security
Target, Version 0.5, August 7, 2023.
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12 Glossary
The following definitions are used throughout this document:
Term Definition
Common Criteria Testing Laboratory (CCTL) An IT security evaluation facility accredited by
the National Voluntary Laboratory
Accreditation Program (NVLAP) and approved
by the CCEVS Validation Body to conduct
Common Criteria-based evaluations.
Conformance The ability to demonstrate in an unambiguous
way that a given implementation is correct with
respect to the formal model.
Evaluation The assessment of an IT product against the
Common Criteria using the Common Criteria
Evaluation Methodology to determine whether
or not the claims made are justified; or the
assessment of a protection profile against the
Common Criteria using the Common
Evaluation Methodology to determine if the
Profile is complete, consistent, technically
sound and hence suitable for use as a statement
of requirements for one or more TOEs that may
be evaluated.
Evaluation Evidence Any tangible resource (information) required
from the sponsor or developer by the evaluator
to perform one or more evaluation activities.
Feature Part of a product that is either included with the
product or can be ordered separately.
Target of Evaluation (TOE) A group of IT products configured as an IT
system, or an IT product, and associated
documentation that is the subject of a security
evaluation under the CC.
Validation The process carried out by the CCEVS
Validation Body leading to the issue of a
Common Criteria certificate.
Validation Body A governmental organization responsible for
carrying out validation and for overseeing the
day-to-day operation of the NIAP Common
Criteria Evaluation and Validation Scheme.
Table 3: Glossary
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13 Bibliography
The Validation Team used the following documents to produce this Validation Report:
[1] Common Criteria for Information Technology Security Evaluation: Part 1: Introduction
and General Model, Version 3.1, Revision 5, April 2017.
[2] Common Criteria for Information Technology Security Evaluation Part 2: Security
functional components, Version 3.1, Revision 5, April 2017.
[3] Common Criteria for Information Technology Security Evaluation Part 3: Security
assurance components, Version 3.1 Revision 5, April 2017.
[4] Protection Profile for Application Software, Version 1.4, 7 October 2021 (ASPP14).
[5] PP-Module for Virtual Private Network (VPN) Clients, Version 2.4, 31 March 2022
(VPNC24).
[6] DataSoft Secure Tactical VPN Client for Android Security Target, Version 0.5, August
7, 2023 (ST).
[7] Secure Tactical VPN Client CC Configuration Guide, Version 1.1, July 26, 2023.
(AGD)
[8] Assurance Activity Report for DataSoft Secure Tactical VPN Client for Android,
Version 0.4, August 7, 2023 (AAR).
[9] Detailed Test Report for DataSoft Secure Tactical VPN Client for Android, Version 0.4,
August 7, 2023 (DTR).
[10] Evaluation Technical Report for DataSoft Secure Tactical VPN Client for Android,
Version 0.4, August 7, 2023 (ETR)