A Chebyshev polynomial-based conditional privacy-preserving authentication and group-key agreement scheme for VANET

Vehicle ad hoc network (VANET) is an open communication environment. Any user can broadcast messages, which means that it be easily attacked by malicious users. Therefore, the authentication of vehicles needed. In this paper, we propose a Chebyshev polynomial-based conditional privacy-preserving and group-key agreement scheme for VANET. Specifically, solve three problems in VANET: (1) improve effectiveness TA using polynomial to authenticate vehicles; (2) reduce computational burden Chinese remainder theorem manage group members; (3) provide privacy users traceable pseudonym scheme. Theoretical experimental results show proposed more efficient than most existing schemes.