VANET-based Secure Value-Added Services

Due to the rapid development of the Internet, vehicular value-added services have become very prevalent in vehicular ad hoc network (VANET); especially for road safety and traffic management. In this paper, we propose a secure value-added service scheme based on blind signature technique for VANET. On one hand, the feature of the portable credential could eliminate the backend communications between roadside unit and service provider. Roadside unit could locally authenticate legitimate vehicles and make sure they are requesting their authorized services. On the other hand, vehicles could achieve the necessary privacy without revealing their real identities. Moreover, the proposed scheme provides more security features than previous works, especially in prevention of privilege elevation problem. Furthermore, compared to the results of those existing systems, we show that the proposed scheme is feasible and efficient.