A Study of Privacy Preserving Authentication for Safety Message Communication in VANET (original) (raw)

Vehicular ad hoc networks are tremendously used for safety related applications. A single point of failure may cause great havoc in the network. Security and privacy are the major concerns. Several solutions are addressed to solve these issues. In this paper we analyze the recent trends in authentication and privacy preservation based on the signature size, verification time and anonymity. Our investigation shows that the id based signatures are suitable for VANET based safety applications due to its reduced signature size. And, the usage of pseudo identities with id based signatures provides a better solution for privacy preservation. Based on this we propose a framework for privacy preserving authentication for safety messages which involves a self-delegation pseudo id generation, id based signatures and priority based verification for prioritized messages and batch verification for non-priority messages.