Managing Trust Along the CAN Bus
Multiple approaches have been created to enhance intra-vehicle communications security over the past three decades since the introduction of the Controller Area Network (CAN) protocol. The twin pair differential-mode communications bus is tremendously robust in the face of interference, yet physical access to the bus offers a variety of potential attack vectors whereby false messages and/or denial of service are achievable. This paper evaluates extensions of a Physical-layer (PHY) common-mode watermark-based authentication technique recently developed to improve authentication on the CAN bus by considering the watermark as a side-channel communications means for high value information. We also propose and analyze higher layer algorithms, with benefits and pitfalls, for employing the watermark as a physical-layer firewall. All of these results are backed by a software-defined radio (SDR) based hardware testbed that verifies backwards compatibility with commercial CAN transceivers and efficacy of the watermark-based authentication.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Michaels, Alan J
- Fletcher, Michael
- Henshaw, Chris
- Palukuru, Venkata Sai Srikar
- Moore, John
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Conference:
- WCX SAE World Congress Experience
- Location: Detroit & Online Michigan, United States
- Date: 2022-4-5 to 2022-4-7
- Publication Date: 2022-3-29
Language
- English
Media Info
- Media Type: Web
- Features: References;
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Communication systems; Computer network protocols; Computer security; Connectivity
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01841551
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2022-01-0119
- Files: TRIS, SAE
- Created Date: Apr 6 2022 2:18PM