Abstract
One of the most challenging issues in vehicular network designs is security matter. Particularly, there have been several potential attacks (e.g., message alteration, eavesdropping, privacy violation, and replay) on Vehicle to Infrastructure (V2I) communication. Most previous studies have based on Public Key Infrastructure (PKI) and authentication in broadcast services. By relying on the PKI solutions, cryptographic overhead and the management difficulties of public key certificates can be problematic. Furthermore, broadcast services can cause network flooding. Hence, this paper proposes a novel authentication scheme based on WAVE unicast services to reduce the PKI overhead between vehicles and Road Side Units (RSU). The new scheme is based on Pairwise Transient Key (PTK) procedures with a few extra authentication steps. To evaluate the new scheme, we have experimented on a Network Simulator (NS-2) under both city and highway scenarios. The experimental results have demonstrated that our new scheme introduces only small WAVE Short Message (WSM) delay. The new scheme is also flexible to use in various scenarios under different road situations.
Highlights
In recent years, vehicular networks have been investigated by academic researchers and industrial laboratories
It can be seen that the Intelligent Transport Systems (ITS) Wireless Access in Vehicular Environments (WAVE) Short Messages (WSM) delay ratio and the error bars ratio grow up when the traffic load becomes large
A novel authentication scheme based on WAVE unicast services has been proposed for V2I
Summary
Vehicular networks have been investigated by academic researchers and industrial laboratories. The creation of vehicular networks is to provide connectivity among vehicles, resulting in road safety improvement and traffic management. These features are very significant in Intelligent Transport Systems (ITS). Most previous V2I authentication and privacy schemes [3,4,5,6] have mainly relied on broadcast communication, which causes network flooding. Boban et al [7] have evaluated the achievable unicast performance over WAVE services under both city and highway environments Their evaluation results have demonstrated that unicast communication has the ability to provide a reliable WAVE service and prevents the network flooding. In this paper, we mainly focus on V2I authentication scheme to solve the cryptographic overhead problem and the management difficulties of public key certificates problem.
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