Anonymous authentication based on cloud storage for cross-regional vehicles in VANET

In VANET, remote network authentication servers can not authenticate the identity of vehicles without the aid of home domain authentication servers if the vehicles are in non-local regions, resulting in longer communication delay. To address this problem, an anonymous authentication scheme based on cloud storage (AABCS) for cross-regional vehicles in VANET is proposed. The secure cloud storage technology is used to build a public traffic cloud (TFC) as a storage media to avoid the problem of a single point failure. In the process of cross-regional authentication, vehicles first send the authentication request that contains the registration information to the non-local authentication server. Then, the non-local authentication server validates the vehicles directly through a round of information interaction. By security and performance analysis, the use of secure cloud storage technology can improve the efficiency of the cross-regional authentication in VANET without undermining the vehicle safety.