Communication efficient distributed decentralized key management framework for message authentication in vanet

Abstract

To provide authentication in Vehicular Ad-Hoc Network (VANET), a cost effective and communication efficient distributed key management framework based on dynamic decentralized group key agreement is proposed. In VANET, the critical issue is exchanging the safety related information such as warning about curves, sharp turns, speed limit and other related information between the vehicles. The proposed Group Secret Key Protocol (GSKP) is a promising security scheme to provide privacy by offering authentication between vehicles in VANET. In this framework, each Road Side Unit (RSU) dynamically generates the GSK and securely distributes the key to the OBUs of Vehicle. By using this GSK, the vehicles can interactively exchanging the safety related information without doing authentication for each communication. GSK is generated dynamically based on the share taken from each vehicle, so the GSK is distributed to only the valid set of vehicles. This technology ensures the dynamic nature in the way that whenever new vehicle comes in to the group or existing member goes out of the group the new GSK is generated. In addition, cooperative verifiers are intelligently selected to significantly reduce the computation and communication overhead. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.