Abstract
Vehicular ad hoc network (VANETs) plays a major part in intelligent transportation to enhance traffic efficiency and safety. Security and privacy are the essential matters needed to be tackled due to the open communication channel. Most of the existing schemes only provide message authentication without identity authentication, especially the inability to support forward secrecy which is a major security goal of authentication schemes. In this article, we propose a privacy-preserving mutual authentication scheme with batch verification for VANETs which support both message authentication and identity authentication. More importantly, the proposed scheme achieves forward secrecy, which means the exposure of the shared key will not compromise the previous interaction. The security proof shows that our scheme can withstand various known security attacks, such as the impersonation attack and forgery attack. The experiment analysis results based on communication and computation cost demonstrate that our scheme is more efficient compared with the related schemes.
Highlights
With the rapid development of wireless communication technology, VANETs has drawn widespread attention in society over the decades
In spite of the huge advantages offered by VANETs, it is still confronted with some problems that need to be solved such as privacy preserving and secure authentication since the communication in VANETs is on an open channel
A conditional privacy-preserving authentication protocol based on Chinese remainder theorem (CRT) for VANETs was elaborated by Zhang et al [39]
Summary
With the rapid development of wireless communication technology, VANETs has drawn widespread attention in society over the decades. E receiver must first verify the legality and integrity of the messages broadcast by other vehicles before it trusts them In these schemes, the identity of the vehicle is not authenticated before it communicates with others. It is vulnerable to forgery attack and impersonation attack and does not provide forward secrecy which is an important security property of authentication scheme. We present an improved mutual authentication scheme with forward secrecy for VANETs in order. (2) We propose an improved mutual authentication scheme for VANETs to resist the security attacks in Cui et al.’s scheme.
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