Abstract
Due to the real-time requirement of message in vehicle ad hoc networks, it is a challenge to design an authentication for vehicle ad hoc networks to achieve security, efficiency, and conditional privacy-preserving. To address the challenge, many conditional privacy-preserving authentication schemes using bilinear pairing or ideal tamper-proof device have been proposed for vehicle ad hoc networks in recent years. However, the bilinear pairing operation is one of the most complex cryptographic operations and the assumption of tamper-proof device is very strong. In this article, an efficient location-based conditional privacy-preserving authentication scheme without the bilinear pairing and tamper-proof device is proposed. Compared with the most recently proposed authentication schemes, the proposed scheme markedly decreases the computation costs of message signing and message verification phase, while satisfies all security requirements of vehicle ad hoc networks and provides conditional privacy-preserving.
Highlights
With the substantial increase in vehicle ownership, people’s life and occupation have more and more closer relationship with vehicles
A vehicle ad hoc networks (VANETs) consists of vehicles equipped with onboard units (OBUs), fixed roadside units (RSUs), and a trusted authority (TA)
The regional trusted authority (RTA) and the key generation center (KGC) can reveal the real identity of message generator if it is necessary by the way proposed in section ‘‘Identity extraction phase.’’ the proposed scheme can meet the conditional privacy-preserving for VANETs
Summary
With the substantial increase in vehicle ownership, people’s life and occupation have more and more closer relationship with vehicles. According to dedicated short-range communication (DSRC) protocol, OBUs broadcast traffic-related messages and vehicles’ condition messages periodically at every 100–300 ms, where traffic-related messages include congestion state, traffic events, and so on, and vehicles’ condition messages include speed, current time, direction, position, and so on With these messages, the application can obtain better awareness of traffic data and provide the best solution for vehicles.[3,4]. As a message involves in a controversial matter, there is one and only one, such as the trusted legal authority, that is able to retrieve the real identity of message generator It is the so-called conditional privacy-preserving, which has been an urgent security requirement for VANETs.[6,7,8] Traffic-related messages in VANETs are real-time and should be processed promptly, and another intractable issue is the efficiency of message signing and verification.
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