Abstract:

Aiming at the problem that vehicle-to-vehicle (V-2-V) authentication and key agreement of cross-domain in VANETs (vehicular ad hoc networks) can be accomplished by the participation of servers,a cross-domain V-2-V password-based authentication and key agreement protocol without server participation is proposed.The protocol uses the method of distributing authentication credentials to achieve cross-authentication,and enhances the security of passwords by combining smart cards with passwords.The security of the protocol is proved under the hard problem of ECCDH (Elliptic Curve Computational Diffie-Hellman).Compared with the existing cross-domain authentication and key agreement protocol that requires server participation,the proposed protocol does not involve server participation,thus avoiding the communication delay caused by the server’s inability to process a large number of authentication requests.

Key words: VANETs, authentication and key agreement, cross-domain, without server participation, password