Using Security Context Pre-Transfer to Provide Security Handover Optimization for Vehicular Ad Hoc Networks

In VANETs(Vehicular Ad Hoc Networks), moving from one RSU´s coverage region to another will bring reauthentication in the new security domain, which can be named security handover problem. In this paper, based on mobility predictability, we propose a novel anonymous communication scheme called SCPT to address the security handover problem. It uses hash chain for vehicle´s anonymous authentication. And it uses security context pre-transfer to provide security handover optimization. From security analysis and performance evaluation, SCPT can achieve security requirement in VANETs, and also reduce the implement latency after vehicle´s handover.