Sybil attack detection using a low cost short group signature in VANET

Vehicular ad hoc network (VANET) has attracted the attention of many researchers in recent years. It enables value-added services such as road safety and managing traffic on the road. Security issues are the challenging problems in this network. Sybil attack is one of the serious security threats that attacker tries to forge some identities. One of the main purposes for creating invalid identities is disruption in voting based systems. In this paper we propose a secure protocol for solving two conflicting goals privacy and Sybil attack in vehicle to vehicle (V2V) communications in VANET. The proposed protocol is based on the Boneh-Shacham (BS) short group signature scheme and batch verification. Experimental results demonstrate efficiency and applicability of the proposed protocol for providing the requirements of privacy and Sybil attack detection in V2V communications in VANET.