Efficient Distribution of Key Chain Commitments for Broadcast Authentication in V2V Communications

Muhammad, Mujahid and Kearney, Paul and Aneiba, Adel and Kunz, Andreas (2021) Efficient Distribution of Key Chain Commitments for Broadcast Authentication in V2V Communications. In: VTC2020-Fall, 18th November - 16h December 2020, Victoria, BC, Canada.

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Road safety applications such as intersection collision warning, emergency brake warnings, etc., rely on the periodic broadcast of messages by vehicles and roadside infrastructure. PKI-based approaches ensuring the integrity of messages and the legitimacy of the sender are computationally expensive and result in long messages. Approaches based on hashed key chains such as Timed Efficient Stream Loss-tolerant Authentication (TESLA) offer an alternative solution. Because they use symmetric-key cryptography, the messages are shorter and less expensive to verify. However, they bring their own challenges. This paper focuses on one challenge, the problem of distributing key chain commitments required for message verification. We propose and evaluate two techniques, respectively involving periodic broadcast of commitment keys by the vehicles themselves and selective unicasting by a central V2X Application Server (VAS). We find that the VAS-centric solution has advantages over the vehicle-centric solution and a related solution proposed by other researchers.

Item Type: Conference or Workshop Item (Paper)
Identification Number: https://doi.org/10.1109/VTC2020-Fall49728.2020.9348684
Date: 15 February 2021
Uncontrolled Keywords: authentication, message integrity, commitment key, V2V communication, security
Subjects: G400 Computer Science
Divisions: Faculty of Computing, Engineering and the Built Environment > School of Computing and Digital Technology > Cyber Security
Depositing User: Mujahid Muhammad
Date Deposited: 30 Nov 2020 11:47
Last Modified: 20 Feb 2021 09:42
URI: http://www.open-access.bcu.ac.uk/id/eprint/10407

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