Layered scalable WAVE security for VANET

We are proposing a layered and scalable WAVE (Wireless Access for Vehicular Environments) security structure for VANET (Vehicular Ad hoc Network) network. The scalability and variable message delivery are provided by using both asymmetric and symmetric encryption algorithm. The whole region is divided into different security domains and the security related load of each domain is distributed evenly. At the top Regional Transportation Authority (RTA) generates keys and store information of Master and Edge RSU (MRSU/ERSU), which in turn store the keys and information of RSU. MRSU/ERSU also provide the pseudonym seeds and store information of vehicles. RSU is used only as access point for contacting transportation authority or access internet. High priority emergency message delivery is expedited by using symmetric key cryptography. Besides, the simulation comparison shows that our scheme also provide significantly improved network throughput without compromising security goals.