Defend Mechanism for Service-Oriented VANETS

There are different types of security and privacy attacks that exist in service-oriented vehicular ad hoc networks s. The unique features of Inter Vehicular Communication (shortly IVC) are a double-edged sword: A powerful collection of tools will be available, but a set of dangerous attacks becomes possible. Recently, there have been different proposals for securing vehicular ad hoc networks s and lessening the potential risks of attacks. Several projects were launched, with the security of vehicular ad hoc networks being their main concern. That is proposed in the literature and has this same aim. However, they use asymmetric encryption systems, mainly the elliptic curve cryptography (Shortly ECC) standard. The security of such applications is different from the security of service-oriented applications because of their different security requirements. The data exchanged in safety messages need not be encrypted. However, messages that contain data from infotainment applications must be tightly encrypted. In the proposed system symmetric scheme (Advanced Encryption Standard (shortly AES)) and the hash chain is used to increase its security to a high extent by using a hierarchical-based encryption function. The hash chain is generated by vehicle and converted as an AC by central authority for security of the data and then the ACs is used as signatures for messages, and RSUs are used for relaying messages between vehicles and CAs.