Novel Sybil Attack Detection in VANETusing CP-ABE Delegation

Abstract

In this paper, Ciphertext-policy attributebased encryption (CP-ABE) delegation scheme is proposed, which allows road side units (RSUs) to perform most of the computation for the purpose of improving the decryption efficiency of the vehicles. In addition to that, proposed a novel Sybil attack detection mechanism, Footprint, using the trajectories of vehicles for identification while still preserving their location privacy. More specifically, when a vehicle approaches a road-side unit (RSU), it actively demands an authorized message from the RSU as the proof of the appearance time at this RSU.