National Information Assurance Partnership
Common Criteria Evaluation and Validation Scheme
Validation Report
for
Hypori Halo Client (Windows) 4.3
Report Number: CCEVS-VR-VID11426-2024
Dated: 21 March 2024
Version: 1.0
National Institute of Standards and Technology
Information Technology Laboratory
100 Bureau Drive
Gaithersburg, MD 20899
Department of Defense
Attn: NIAP, Suite 6982
9800 Savage Road
Fort Meade, MD 20755-6982
®
TM
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Acknowledgements
Validation Team
Daniel Faigin
Swapna Katikaneni
The Aerospace Corporation
Common Criteria Testing Laboratory
Leidos Inc.
Columbia, MD
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Table of Contents
1 Executive Summary .......................................................................................................... 1
2 Identification.................................................................................................................... 2
3 TOE Architecture............................................................................................................... 4
4 Security Policy .................................................................................................................. 6
4.1 Cryptographic Support.......................................................................................................... 6
4.2 User Data Protection............................................................................................................. 6
4.3 Identification and Authentication ......................................................................................... 6
4.4 Security Management........................................................................................................... 6
4.5 Privacy.................................................................................................................................. 6
4.6 Protection of the TSF ............................................................................................................ 6
4.7 Trusted Path/Channels ......................................................................................................... 6
5 Assumptions and Clarification of Scope ............................................................................ 7
5.1 Assumptions......................................................................................................................... 7
5.2 Clarification of Scope ............................................................................................................ 7
6 Documentation................................................................................................................. 8
7 IT Product Testing............................................................................................................. 9
7.1 Test Configuration ................................................................................................................ 9
8 Evaluated Configuration................................................................................................. 10
9 Results of the Evaluation ................................................................................................ 11
9.1 Evaluation of the Security Target (ST) (ASE) ........................................................................ 11
9.2 Evaluation of the Development (ADV)................................................................................. 11
9.3 Evaluation of the Guidance Documents (AGD) .................................................................... 11
9.4 Evaluation of the Life Cycle Support Activities (ALC)............................................................ 11
9.5 Evaluation of the Test Documentation and the Test Activity (ATE) ...................................... 12
9.6 Vulnerability Assessment Activity (AVA) ............................................................................. 12
9.7 Summary of Evaluation Results........................................................................................... 12
10 Validator Comments/Recommendations..................................................................... 13
11 Security Target............................................................................................................ 14
12 Abbreviations and Acronyms....................................................................................... 15
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13 Bibliography................................................................................................................ 16
List of Tables
Table 1: Evaluation Identifiers 2
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1 Executive Summary
This Validation Report (VR) documents the National Information Assurance Partnership (NIAP) assessment
of the evaluation of Hypori Halo Client (Windows) 4.3 (the Target of Evaluation, or TOE). It presents the
evaluation results, their justifications, and the conformance results. This VR is not an endorsement of the
TOE by any agency of the U.S. Government and no warranty of the TOE is either expressed or implied.
This VR is intended to assist the end-user of this product and any security certification agent for that end-
user in determining the suitability of this Information Technology (IT) product in their environment. End-
users should review the Security Target (ST), which is where specific security claims are made, in
conjunction with this VR, which describes how those security claims were evaluated and tested and any
restrictions on the evaluated configuration. This VR applies only to the specific version and configuration
of the product as evaluated and as documented in the ST. Prospective users should carefully read the
Assumptions and Clarification of Scope in Section 5 and the Validator Comments in Section 10, where any
restrictions on the evaluated configuration are highlighted.
The evaluation was performed by Leidos Common Criteria Testing Laboratory (CCTL) in Columbia,
Maryland, USA, and was completed in February 2023. The information in this report is largely derived
from the Evaluation Technical Report (ETR) and associated test report, all written by Leidos. The
evaluation determined that the TOE is:
• Common Criteria Part 2 Extended and Common Criteria Part 3 Extended
and demonstrates exact conformance to:
• Protection Profile for Application Software, Version 1.4, 7 October 2021 ([5])
as clarified by all applicable Technical Decisions.
The TOE is Hypori Halo Client (Windows) 4.3.
The TOE identified in this VR has been evaluated at a NIAP approved CCTL 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). The evaluation has been conducted in accordance with the
provisions of the NIAP Common Criteria Evaluation and Validation Scheme (CCEVS) and the conclusions
of the testing laboratory in the ETR 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 documented in the ETR and the
Assurance Activities Report (AAR). The validation team found that the evaluation showed that the product
satisfies all of the functional requirements and assurance requirements stated in the ST. The conclusions
of the testing laboratory in the ETR are consistent with the evidence produced. Therefore, the validation
team concludes that the testing laboratory's findings are accurate, the conclusions justified, and the
conformance results are correct.
The Leidos evaluation team determined that the TOE is conformant to the claimed Protection Profile (PP)
and, when installed, configured and operated as specified in the evaluated guidance documentation,
satisfies all the security functional requirements stated in the ST ([6]).
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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, commercial testing laboratories called Common Criteria Testing Laboratories (CCTLs) use the
Common Criteria (CC) and Common Methodology for IT Security Evaluation (CEM) to conduct security
evaluations, 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 IT 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 Product Compliant List (PCL).
Table 1 provides information needed to completely identify the product, including:
• The TOE—the fully qualified identifier of the product as evaluated
• The ST—the unique identification of the document describing the security features, claims, and
assurances of the product
• The conformance result of the evaluation
• The PP/PP-Modules to which the product is conformant
• The organizations and individuals participating in the evaluation.
Table 1: Evaluation Identifiers
Item Identifier
Evaluation Scheme United States NIAP Common Criteria Evaluation and Validation Scheme
TOE Hypori Halo Client (Windows) 4.3
Security Target Hypori Halo Client (Windows) 4.3 Security Target, Version 1.0, 15 March
2024
Sponsor & Developer Hypori, Inc,
1801 Robert Fulton Drive, Suite 440
Reston, VA 20191
Completion Date March 2024
CC Version Common Criteria for Information Technology Security Evaluation,
Version 3.1, Release 5, April 2017
CEM Version Common Methodology for Information Technology Security Evaluation:
Version 3.1, Release 5, April 2017
PP Protection Profile for Application Software, Version 1.4, 7 October 2021
Conformance Result PP Compliant, CC Part 2 extended, CC Part 3 extended
CCTL Leidos
Common Criteria Testing Laboratory
6841 Benjamin Franklin Drive
Columbia, MD 21046
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Item Identifier
Evaluation Personnel Pascal Patin
Allen Sant
Josh Marciante
Dawn Campbell
Validation Personnel Daniel Faigin
Swapna Katikaneni
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3 TOE Architecture
Note: The following architectural description is based on the description presented in the ST.
Hypori Halo Client (Windows) 4.3 is a component of the Hypori Halo Platform. In the Hypori Halo platform,
end users install and run the TOE on their devices to access a Hypori Virtual Device running on a Hypori
Server in the cloud. The Hypori Virtual Device on the Hypori Server contains data and applications for the
users. The TOE communicates with the Hypori Virtual Device using TLS 1.2 and brokers access between
the device and the applications executing in the Hypori Virtual Device. This concept of operation is
illustrated in the following figure.
Figure 1 Hypori Halo Client Communication with a Hypori Virtual Device on a Hypori Server
The TOE comprises the Hypori Halo Client (Windows) 4.3 application that installs on the end user’s device
and communicates with the Hypori Virtual Device on the server using TLS 1.2 (provided by the underlying
Windows platform). The Hypori Server, Hypori Virtual Device, Admin Console, User Management Console,
applications running on the Hypori Server, the hardware platform device, and any functions not specified
in the ST are outside the scope of the TOE. Figure 2 shows the relationship of the TOE to its operational
environment.
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Figure 2 TOE Boundary for Windows Devices
The TOE’s operational environment comprises the Windows-based device on which it is installed. The TOE
is evaluated on Windows 10 and 11.
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4 Security Policy
The TOE enforces the following security policies as described in the ST.
Note: Much of the description of the security policy has been derived from the ST and the Final ETR.
4.1 Cryptographic Support
The TOE establishes secure communication with the Hypori Virtual Device on the server using TLS and
cryptographic services provided by the Windows platform. The TOE stores certificates for mutual
authentication in the Windows Certificate Store.
4.2 User Data Protection
The TOE informs a user of hardware and software resources the TOE accesses. The user initiates a secure
network connection to the Hypori Virtual Device on the server using the TOE. In general, sensitive data
resides on the Hypori Server and not the TOE or TOE platform, although the TOE does store credentials as
identified above in Section 4.1.
4.3 Identification and Authentication
The TOE supports X.509 certificate validation as part of establishing TLS connections. The TOE relies on
platform-provided functionality to support certificate validity checking methods, including the checking
of certificate revocation status using OCSP. If the validity status of a certificate cannot be determined, the
certificate will not be accepted.
4.4 Security Management
Security management consists of setting Hypori Client configuration options and applying configuration
policies from the Hypori Server. The TOE uses the platform’s mechanisms for storing the configuration
settings.
4.5 Privacy
The TOE does not transmit personally identifiable information (PII) over a network.
4.6 Protection of the TSF
The TOE uses security features and APIs that the platform provides. The TOE leverages package
management for secure installation and updates. The TOE package includes only those third-party
libraries necessary for its intended operation.
4.7 Trusted Path/Channels
The TOE invokes platform-provided functionality to encrypt all transmitted data using TLS 1.2 for all
communication with the Hypori Virtual Device on the Hypori Server.
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5 Assumptions and Clarification of Scope
5.1 Assumptions
The ST references the PP to which it claims conformance for assumptions about the use of the TOE. Those
assumptions, drawn from the claimed PP, are as follows:
• The TOE relies upon a trustworthy computing platform with a reliable time clock for its execution.
This includes the underlying platform and whatever runtime environment it provides to the TOE.
• The user of the application software is not willfully negligent or hostile, and uses the software in
compliance with the applied enterprise security policy.
• The administrator of the application software is not careless, willfully negligent or hostile, and
administers the software in compliance with the applied enterprise security policy.
5.2 Clarification of Scope
All evaluations (and all products) have limitations, as well as potential misconceptions that need clarifying.
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 evaluation activities specified in
Protection Profile for Application Software, Version 1.4, 7 October 2021 ([5]) and performed by
the evaluation team).
• This evaluation covers only the specific software distribution and version identified in this
document, and not any earlier or later versions released or in process.
• The evaluation of security functionality of the product was limited to the functionality specified
in Hypori Halo Client (Windows) 4.3 Security Target, Version 1.0, 15 March 2024 ([6]).
• The TOE consists solely of software and relies on its operational environment for supporting
security functionality, as identified in [6].
• 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 TOE must be installed, configured and managed as described in the documentation
referenced in Section 6 of this VR.
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6 Documentation
The vendor offers guidance documents describing the installation process for the TOE as well as guidance
for subsequent administration and use of the applicable security features. The guidance documentation
examined during the evaluation and delivered with the TOE is as follows:
• Hypori Halo Client User Guide, Common Criteria Configuration and Operation, Version 4.3 ([7])
• Hypori Halo Administrator Guide, Version 1.18 ([8])
To use the product in the evaluated configuration, the product must be configured as specified in this
documentation.
Any additional customer documentation provided with the product, or that which may be available online,
was not included in the scope of the evaluation and therefore should not be relied upon to configure or
operate the TOE as evaluated. Consumers are encouraged to download the evaluated administrative
guidance documentation from the NIAP website.
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7 IT Product Testing
This section describes the testing efforts of the evaluation team. It is derived from information contained
in the following proprietary document:
• Hypori Halo Client (Windows) 4.3 Common Criteria Test Report and Procedures, Version 1.0,
February 16, 2024 ([11])
A non-proprietary description of the tests performed and their results is provided in the following
document:
• Assurance Activities Report for Hypori Halo Client (Windows) 4.3, Version 1.0, 18 March 2024
([10])
The purpose of the testing activity was to confirm the TOE behaves in accordance with the TOE security
functional requirements as specified in the ST for a product that claims conformance to Protection Profile
for Application Software ([5]).
The evaluation team devised a Test Plan based on the Testing Assurance Activities specified in Protection
Profile for Application Software. The Test Plan described how each test activity was to be instantiated
within the TOE test environment. The evaluation team executed the tests specified in the Test Plan and
documented the results in the team test report listed above.
Independent testing took place at Leidos CCTL facilities in Columbia, Maryland, from July 24, 2023, to
February 16, 2024.
The evaluators received the TOE in the form that customers would receive it, installed and configured the
TOE in accordance with the provided guidance, and exercised the Team Test Plan on equipment
configured in the testing laboratory.
Given the complete set of test results from the test procedures exercised by the evaluators, the testing
requirements for Protection Profile for Application Software were fulfilled.
7.1 Test Configuration
The evaluation team established a test configuration consisting of the TOE (Hypori Halo Client (Windows)
4.3) installed on each of the following Windows devices:
• Microsoft Surface Pro 7+ running Windows 10 Enterprise 21H2
• Microsoft Surface Laptop Go 2 running Windows 11 Pro 21H2.
Each Windows device also included Wireshark 4.0 or to run Wireshark captures and perform port scans
The test configuration also included a test server and OCSP Responder used to support testing of X.509
requirements. The test server, running Ubuntu 18.04, included the following:
• OpenSSL 1.1.1
• Custom Leidos CCTL TLS Server and Client test tools
• XCA 2.4.0.
• Nmap 7.60
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8 Evaluated Configuration
The TOE consists of the Hypori Halo Client (Windows) 4.3 software application, that communicates only
with the Hypori Virtual Device on the Hypori server, using TLS 1.2 provided by the underlying Windows
platform.
The TOE is evaluated on Windows 10 and 11 only.
The TOE imposes no hardware requirements beyond those of the Windows operating system on which it
is installed.
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9 Results of the Evaluation
The results of the evaluation of the TOE against its target assurance requirements are generally described
in this section and are presented in detail in the proprietary Evaluation Technical Report for Hypori Halo
Client (Windows) 4.3 ([9]). The reader of this VR can assume that all assurance activities and work units
received passing verdicts.
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,
revision 5 ([1], [2], [3]) and CEM version 3.1, revision 5 ([4]), and the specific evaluation activities specified
in Protection Profile for Application Software, Version 1.4, 7 October 2021 ([5]). The evaluation
determined the TOE satisfies the conformance claims made in the Hypori Halo Client (Windows) 4.3
Security Target, of Part 2 extended and Part 3 extended. The TOE satisfies the requirements specified in:
• Protection Profile for Application Software, Version 1.4, 7 October 2021 ([5]).
The Validators reviewed all the work of the evaluation team and agreed with their practices and findings.
9.1 Evaluation of the Security Target (ST) (ASE)
The evaluation team performed each TSS assurance activity and ASE CEM work unit. The ST evaluation
ensured the ST contains an ST introduction, TOE overview, TOE description, security problem definition in
terms of threats, policies and assumptions, description of security objectives for the operational
environment, a statement of security requirements claimed to be met by the product that are consistent
with the claimed Protection Profile, and security function descriptions that satisfy the requirements.
9.2 Evaluation of the Development (ADV)
The evaluation team performed each ADV assurance activity and applied each ADV_FSP.1 CEM work unit.
The evaluation team assessed the evaluation evidence and found it adequate to meet the requirements
specified in the claimed Protection Profile for design evidence. The ADV evidence consists of the TSS
descriptions provided in the ST and product guidance documentation providing descriptions of the TOE
external interfaces.
9.3 Evaluation of the Guidance Documents (AGD)
The evaluation team performed each guidance assurance activity and applied each AGD work unit. The
evaluation team determined the adequacy of the operational user guidance in describing how to operate
the TOE in accordance with the descriptions in the ST. The evaluation team followed the guidance in the
TOE preparative procedures to test the installation and configuration procedures to ensure the
procedures result in the evaluated configuration. The guidance documentation was assessed during the
design and testing phases of the evaluation to ensure it was complete.
9.4 Evaluation of the Life Cycle Support Activities (ALC)
The evaluation team performed each ALC assurance activity and applied each ALC_CMC.1 and ALC_CMS.1
CEM work unit, to the extent possible given the evaluation evidence required by the claimed Protection
Profile. The evaluation team ensured the TOE is labeled with a unique identifier consistent with the TOE
identification in the evaluation evidence, and that the ST describes how timely security updates are made
to the TOE.
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9.5 Evaluation of the Test Documentation and the Test Activity (ATE)
The evaluation team performed each test activity and applied each ATE_FUN.1 CEM work unit. The
evaluation team ran the set of tests specified by the claimed PP and recorded the results in the Test
Report, summarized in the AAR.
9.6 Vulnerability Assessment Activity (AVA)
The evaluation team performed each AVA assurance activity and applied each AVA_VAN.1 CEM work unit.
The evaluation team performed a vulnerability analysis following the processes described in the claimed
PP. This comprised a search of public vulnerability databases.
Searches of public vulnerability repositories were performed on November 2, 2023, January 24th, 2024,
February 15, 2024, and March 18, 2024.
The evaluation team searched the following public vulnerability repositories.
• National Vulnerability Database (http://web.nvd.nist.gov/view/vuln/search)
• US-CERT Vulnerability Notes Database (https://www.kb.cert.org/vuls/).
The evaluation team used the following search terms in the searches of these repositories:
• Hypori
• Hypori Client
• Hypori Halo
• Android Cloud Environment
• Thin Client
• Virtual Mobile Infrastructure
• The third party libraries referenced in section 5.2.6.4 of the ST.
The results of these searches did not identify any vulnerabilities that are applicable to the TOE. The
conclusion drawn from the vulnerability analysis is that no residual vulnerabilities exist that are
exploitable by attackers with Basic Attack Potential as defined by the Certification Body in accordance
with the guidance in the CEM.
9.7 Summary of Evaluation Results
The evaluation team’s assessment of the evaluation evidence demonstrates that the claims in the ST are
met, sufficient to satisfy the assurance activities specified in the claimed Protection Profile. 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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10 Validator Comments/Recommendations
As stated in section 5, the scope of this evaluation was limited to the functionality and assurances
covered in the Protection Profile for Application Software, Version 1.4, 7 October 2021. Other
functionality included in the product was not assessed as part of this evaluation. All other functionality
provided by the product needs to be assessed separately, and no further conclusions can be drawn
about their effectiveness. The evaluated configuration is dependent upon the TOE being configured per
the evaluated configuration described in section 8 and the instructions in the Administrator Guide
document listed in section 6.
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11 Security Target
The ST for this product’s evaluation is Hypori Halo Client (Windows) 4.3 Security Target, Version 1.0, 15
March 2024 [6].
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12 Abbreviations and Acronyms
This section identifies abbreviations and acronyms used in this document.
API Application Programming Interface
CC Common Criteria for Information Technology Security Evaluation
CCTL Common Criteria Testing Laboratory
CEM Common Evaluation Methodology
ETR Evaluation Technical Report
IT Information Technology
PCL Product Compliant List
PII Personally Identifiable Information
SAR Security Assurance Requirement
SFR Security Functional Requirement
ST Security Target
TLS Transport Layer Security
TOE Target of Evaluation
TSF TOE Security Functions
TSS TOE Summary Specification
VMI Virtual Mobile Infrastructure
VR Validation Report
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13 Bibliography
The validation team used the following documents to produce this VR:
[1] Common Criteria Project Sponsoring Organisations. Common Criteria for Information Technology
Security Evaluation: Part 1: Introduction and general model, Version 3.1, Revision 5, April 2017.
[2] Common Criteria Project Sponsoring Organisations. Common Criteria for Information Technology
Security Evaluation: Part 2: Security functional components, Version 3.1, Revision 5, April 2017.
[3] Common Criteria Project Sponsoring Organisations. Common Criteria for Information Technology
Security Evaluation: Part 3: Security assurance requirements, Version 3.1, Revision 5, April 2017.
[4] Common Criteria Project Sponsoring Organisations. Common Evaluation Methodology for
Information Technology Security, Version 3.1, Revision 5, April 2017.
[5] Protection Profile for Application Software, Version 1.4, 7 October 2021.
[6] Hypori Halo Client (Windows) 4.3 Security Target, Version 1.0, 15 March 2024.
[7] Halo Client User Guide, Common Criteria Configuration and Operation, Version 4.3
[8] Hypori Halo Administrator Guide, Version 1.18
[9] Evaluation Technical Report for Hypori Halo Client (Windows) 4.3 (Proprietary), Version 1.0, 18
March 2024.
[10] Assurance Activities Report for Hypori Halo Client (Windows) 4.3, Version 1.0, 18 March 2024.
[11] Hypori Halo Client (Windows) 4.3 Common Criteria Test Report and Procedures, Version 1.0,
February 16, 2024.