Path Privacy-Preserving Scheme Based on Oblivious Transfer Protocol

Vehicular ad hoc networks (VANETs) can provide information and technical support for vehicles connected to the Internet, improving driving efficiency. However, VANETs requires drivers to disclose their specific driving paths to the server, and this measure increases the risk of leaking privacy. Honest but curious service providers may want to know customers' other private messages by collecting information about vehicle paths. Therefore, we propose an architecture based on the oblivious transport protocol to solve the above problems. In this architecture, the driver can obtain the required RSU messages without revealing the specific route information to the server. At the same time, our scheme uses the Chinese residual theorem to revoke malicious users, protecting the legitimate interests of service providers and RSU s. Finally, AES achieves fast authentication between the vehicle and the RSU, ensuring that the user can obtain real-time information while driving. Experiments show that our system can reduce computational costs compare to other methods.