Recent advances in wireless inter-vehicle communication systems enable the establishment of Vehicular Ad-hoc Networks (VANET) and create significant opportunities for the deployment of a wide variety of applications and services to vehicles. VANETs enable vehicles to communicate with each other and with road side units (RSU). The deployment of vehicular communication systems is strongly dependent on their security and privacy features. Security and privacy are major research concerns in VANETs

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... ue to the frequent vehicles movement, time critical response and hybrid architecture of VANETs that make them different than other Ad hoc networks. In order to meet performance goals, it is widely agreed that vehicular ad hoc networks must rely heavily on node-to-node communication, thus allowing for malicious data traffic. At the same time, the easy access to information afforded by VANETs potentially enables the difficult security goal of data validation. Here a suite of novel security and privacy mechanism is proposed using the HARDY function, i.e. hierarchical-based encryption function, and thus evaluating and improving the performance.