An Implementation of Efficient Group Signature for Anonymous Authentication System in Vehicular Ad-Hoc Networks

Due to features of mobility and velocity of movement all nodes in Vehicular Ad-hoc Networks (VANETs), these infrastructureless wireless ad-hoc networks become challenging. This is much more interesting when involving not only security but also privacy protection of vehicles. Secure communications among vehicles or between vehicles and Road-Side Units (RSUs) should be mandatory satisfied through encryption, anonymous authentication, and the integrity guarantee of exchanging information. Hence, both security and privacy protection of vehicles should be considered. Therefore, this paper proposes an anonymous authentication system to enable a vehicle proves that he/she is a legitimated vehicle in the VANET without revealing his/her privacy information to other vehicles or RSUs. To realize this aim, an efficient group signature scheme is adopted. The measurement results showed the practicality of proposed system to achieve only about 185 ms or 121 ms in conducting an anonymous authentication either in Vehicle-to-Vehicle (V2V) communication or Vehicle-to-RSU (V2R) communication.