A New Master Key Agreement Scheme for Secure Group Communication in Vehicular ad hoc Network

Vehicular ad-hoc networks are obtained by applying important features of mobile ad hoc networks, in this application, it is not easy to preserve security and make this network private. Various attackers try to exploit VANETs and send forgery messages to deceive other vehicles which may lead harmful for driver/ passenger. To improve traffic safety and comfort of driving and travelling, it is required to obtain integrity of the messages, identifying and defending against the misbehaving vehicles that should be signed and verified before they are trusted while the real identity of vehicles should not be revealed. In this paper, we propose a master key agreement schemes for VANETs, vehicles are divided into separate different groups. In each group, group leader manages its members and distributes public / private key pairs to members for communication. Here group leader contains master key, which may require for encrypting session key and other communication information in the same groups or different groups securely. To provide secure communication we use, master key and asymmetric cryptography, and appropriate rekeying structure this raises the concern of security, privacy preservation and defends against the misbehaving vehicles. Performance evaluation and analysis of our scheme provides better rekeying structure comparison to existing mechanisms and also preserves security requirements including authentication, confidentiality, data integrity, non-repudiation, and unforgeability.