United States Department of Transportation
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PTC Communications: Cybersecurity Technology Review and Concept of Operations
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2023-08-12
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[PDF-2.37 MB]
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Edition:28-09-2020 – 28-02-2022
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Abstract:Researchers sought to determine how to improve the confidentiality of information passing through the Positive Train Control network without significantly affecting network performance. Phase 1 of the project reviewed requirements and assessed existing technologies. Phase 2 focused on implementation, migration, and deployment challenges. A recommendation to consider widely available algorithms covered by recognized open standards resulted in a project decision to focus on the National Institute of Standards and Technology Lightweight Encryption Algorithms and the ELLI algorithm covered by ISO/IEC 29192-4. Phase 3 identified technology gaps and areas for further research outside the scope of the project. Phase 4, the focus of this report, pulls together the work from Phases 1-3 to propose solutions to improve confidentiality, including a concept of operations for each solution.
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