A low computation message delivery and authentication VANET protocol

In vehicular ad hoc networks (VANET), in order to preserve the real identity of message sender from attackers, message authenticity and integrity verification should be performed swiftly. Reducing the computations and communication overhead is highly needed. The proposed protocol focuses on reducing the computation required for the road side communication V2I without affecting the security level. The proposed low computational protocol generates and exchanges symmetric key in the public channel without using Diffie-Hellman protocol in hybrid with using low computation RSA that uses Chinese Remainder Theorem (CRT-RSA) instead of using traditional RSA. The simulation experiments show that the proposed protocol decreases the computational overhead significantly with 90.6% compared to other developed protocols. Also, hypothesis of the different security requirements for the safety messages versus the non-safety (entertainment) messages is examined.