Security Considerations on 5G-Enabled Back-Situation Awareness for CCAM

The increasing demand for cooperative, connected, and automated mobility (CCAM) services should proceed at the same pace with the enforcement of security mechanisms that would make CCAM services secure. The first contribution of this paper resides in a review of the ongoing regulatory and standardization activities related to cybersecurity of autonomous vehicles. Then, referring to the ongoing piloting activities funded by the European Union, we focus on the security threats for back-situation awareness (BSA), i.e., a safety-related CCAM service dealing with emergency scenarios. We propose a practical strong authentication method for BSA, and extensively discuss how existing standards can mitigate the security threats of this prominent CCAM service.