BAVC: Efficient Blockchain-Based Authentication Scheme for Vehicular Secure Communication

Emerging blockchain technology supports mutually distrustful parties to communicate safely without a trusted central entity. The security and privacy protection are prerequisites for communication in vehicular ad-hoc network (VANET). In this paper, we propose an efficient blockchain-based authentication scheme for vehicular secure communication (BAVC). BAVC introduces smart contract to restrict access to the network, which deny the access of malicious vehicles. To achieve better performance and reduce the computational cost of message processing in VANET, our proposed BAVC scheme uses Elliptic Curve Cryptography (ECC) to achieve anonymous communication of vehicles instead of using bilinear paring. We can evaluate the trustworthiness of a message according to confidence level provided by nearby vehicles which received this message. Moreover, the analysis results show that our scheme has better performance, it satisfies the security and privacy requirement with low computation cost.