Secure and Efficient Message Authentication Scheme for 6G-Enabled VANETs

Abstract

In 6G-enabled vehicle ad hoc networks (VANETs), the messages transmitted through wireless communication face security problems such as tampering and disclosure. In this paper, to ensure the security of transmitted messages and the privacy of vehicle users, we propose an anonymous and secure message authentication (ASMA) scheme. The ASMA scheme can realize message verification and conditional privacy preservation with a lower computation overhead, and its security does not depend on a tamper-proof device (TPD). As the numbers of vehicles and applications increase in 6G-enabled VANETs, the number of messages in the network increases greatly. One-by-one verification messages in the ASMA scheme cannot meet the strict low-latency requirements. To improve the efficiency of the ASMA scheme, we investigate a proxy-vehicle-assisted batch message authentication (PVBA) scheme. In the scheme, a proxy vehicle selection algorithm is designed to choose a certain number of proxy vehicles, and the message verification tasks are completed by a roadside unit (RSU) and the proxy vehicles synchronously. Performance analysis shows that in the case of large-scale messages, the PVBA scheme has lower verification delay than related schemes, and the verification efficiency is greatly improved.