Secure Vehicular Communication Using ID Based Signature Scheme

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Vehicular ad hoc network (VANET) is a wireless ad hoc network which is created among vehicles, road side units (RSU) and regional trusted authorities. It provides inter-vehicle communications as well as communication between vehicles and RSUs. An authentication framework has been proposed in order to establish secure communication in VANET environment. Privacy of the vehicles has to be ensured in the network, which avoids misuse of private data. Self-generated public key cryptography based pseudo IDs are used instead of original IDs of vehicles for privacy preservation. The proposed scheme uses id-based signature (IBS) and ID-based online/offline signature (IBOOS) scheme for authentication purpose. Communication between vehicles and RSUs are authenticated using IBS scheme and IBOOS scheme authenticates communication between vehicles. By using these schemes, communication among vehicles under different RSUs and RTAs are also authenticated. Security attacks based on authentication like impersonation attack, Sybil attack are also resolved and the malicious nodes are isolated from the network. Vehicle-to-vehicle authentication without RSUs is also carried out by using RSA algorithm. Finally, the performance of the system is compared with recent schemes. Simulation results show that the proposed scheme provides secure communication among vehicles in the network with less communication and computation overhead.