The UNESCO chair in data privacy research in vehicular networks
DPM'09/SETOP'09 Proceedings of the 4th international workshop, and Second international conference on Data Privacy Management and Autonomous Spontaneous Security
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Vehicular ad hoc networks (VANETs) will improve traffic safety and efficiency provided that car-to-car communication stays trustworthy. Therefore, it is crucial to ensure that the information conveyed by vehicle-generated messages is reliable. A sensible option is to request that the content of a message originated by a certain vehicle be endorsed by nearby peer vehicles. However, neither message generation nor message endorsement should entail any privacy loss on the part of vehicles co-operating in it. This chapter surveys the available solutions to this security-privacy tension and analyzes their limitations. A new privacy-preserving system is sketched which guarantees message authentication through both a priori and a posteriori countermeasures.