Message Authentication Scheme for VANET Based on Proxy Re-Signature

Abstract

To solve the problems of privacy protection and low efficiency of signature verification in vehicle ad-hoc networks, a new message authentication scheme based on proxy re-signature technology is proposed. The new scheme can transform the signature on the message from the roadside into the signature on the same message signed by the trusted authority by using the proxy re-signature, and achieves the anonymity of vehicle identity and traceability of the communication message. The server is introduced into the signature verification of the message, which reduces the computational cost of the verifier, and effectively improves the signature verification performance. The analysis results show that the proposed scheme not only has higher security, but also has lower computational overhead.