%0 Journal Article
%T A Novel Authentication Scheme for V2I Communication Based on WAVE Unicast Services
%A Atthapol Suwannasa
%A Somnuk Puangpronpitag
%A Wirat Phongsiri
%J International Journal of Distributed Sensor Networks
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/827084
%X 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. 1. Introduction In recent years, 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). In a vehicular network, there are two wireless terminals, namely, Road Side Unit (RSU) and On-Board Unit (OBU). The RSUs may be connected with their infrastructures or other RSUs and located at important parts along roadside. The OBUs are wireless devices, equipped in vehicles to communicate with RSUs and other OBUs. To support ITS, the IEEE 802.11p Dedicated Short Range Communications (DSRC) [1] has been standardized for Wireless Access in Vehicular Environments (WAVE), including Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I). WAVE Short Message Protocol (WSMP) [2] specifies the format of WAVE Short Messages (WSM), exchanged over V2V and V2I. Security issues in vehicular networks are very crucial due to the sensitivity of WAVE messages in daily life (e.g., accident alerting, traffic jam warning, and traffic light notification). A few malicious WSMs can even create an enormous damage to people and vehicles. Furthermore, privacy must be preserved to protect user private information (e.g., driver¡¯s name and license number). The privacy preservation requires some
%U http://www.hindawi.com/journals/ijdsn/2013/827084/