Efficient and Automatic Pseudonym Management Scheme for VANET with Blockchain

Abstract

As a product of the development of intelligent transportation system, vehicular ad hoc network (VANET) has been widely studied in recent years, where the vehicles would utilize many pseudonyms to achieve conditional privacy protection. With the increasing number of pseudonyms, the management of pseudonyms would become a new challenge. In this paper, we investigate pseudonym management in VANET based on blockchain. Firstly, an efficient and automatic pseudonym management scheme is proposed to realize the registration, update and revocation of vehicle’s pseudonyms. At the same time, the voting system is applied to the pseudonym revocation protocol, which can provide a solution of the legal vehicle’s pseudonym being revoked wrongly. Then, security analysis shows that the proposed scheme can meet the security requirements of VANET. Finally, the performance of the proposed scheme is analyzed through the experiments and simulations. The experimental results show that the automatic pseudonym management scheme is practical and superior to the existing schemes in terms of storage and computational overhead.