Security enhancement in group based authentication for VANET

In Vehicular Ad Hoc Networks(VANET), vehicles communicate among each other and with infrastructure points by broadcasting safety and non-safety messages in the network. Due to wireless communication, security and privacy are very important issues to avoid threat in the network. Group based vehicle to vehicle (V2V) communication scheme is proposed here which prevents vehicle from threat. To achieve security and privacy goals, we propose one time authentication for group and then V2V communication is done using group symmetric key within group. Our scheme satisfies all security and privacy requirements such as authentication, non-repudiation and conditional traceability. In case of malicious activity, this scheme can trace malicious vehicle which generates a false message. Computation and communication cost is improved as compared and analyzed with other previous schemes.

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