TARI: Meeting Delay Requirements in VANETs with Efficient Authentication and Revocation

VANET based information systems have considerable promise for improving traffic safety, reducing congestion and increasing environmental efficiency of transportation systems. However, the potential of these systems will not be realized until the issue of network security is fully resolved. In this paper, we introduce a security scheme called Temporary Authentication and Revocation Indicator for VANETs. Using analytical and simulation based analyses, we examine the timing delay incurred by TARI and other security metrics. We demonstrate that TARI is efficient enough to be deployed in safety critical VANET applications and can scale to dense networks with many vehicles competing for broadcast air-time.