Sulaiman Ashraph, Dawoud S Dawoud and Auxeeliya Jesudoss.
ABSTRACT
In any VANET, security and privacy are the two fundamental issues. Obtaining efficient security in vehicular communication is essential without compromising privacy preserving mechanisms. Designing a suitable protocol for VANET by having these two issues in mind is challenging because efficiency, unlinkablity and traceability are the three qualities having contradictions between them. In this paper, we introduce an efficient Reusable Pseudo-id Distribution (RPD) scheme. The proposed protocol is characterized by the Trusted Authority (TA) designating the Road Side Units (RSUs) to generate n reusable pseudo ids and distribute them to the On Board Units (OBUs) on request. RSUs issue the aggregated hashes of all its valid pseudo-ids along with a symmetric shared key and a particular pseudo-id to each vehicle that enters into its coverage range. Through this the signatures and certificates attached to the messages can be eliminated and thus resulting in a significantly reduced packet size. The same anonymous keys can then be re-distributed by the RSUs episodically to other vehicles. We analyze the proposed protocol extensively to demonstrate its merits and efficiency.
Engineering and Technological Innovations 