Abstract: Most security- and privacy-preserving protocols in vehicular ad hoc networks (VANETs) heavily rely on time-consuming cryptographic operations which produce a huge volume of cryptographic data. These data are usually employed for many kinds of decisions, which poses the challenge of processing the received cryptographic data fast enough to avoid unaffordable delay. Now a day in Vehicular Communication, a Vehicular ad-hoc network (VANET) is facing problem with vehicle anonymity and location privacy while communicating among the vehicle. For security purpose Vehicular Public Key Infrastructure (VPKI) has been used. Security becomes very important for VANET considering the criticality of secured application. By using elliptic curve cryptography PKI algorithm provides trustworthiness of vehicular communications and privacy of vehicles, and enables vehicles to react to vehicular reports containing cryptographic data. New Technique HMAC provides secure and efficient communication in VANET environment. Using malicious Vehicular Analyzer algorithm and Elliptic Curve Cryptography (ECC) malicious messages are identified. It also detects the accident and other problems in the path of the vehicles. Elliptic Curve Cryptography (ECC) algorithm is used for stronger security during communication.

Keywords: Vehicular Ad Hoc Networks (VANETs), Vehicular Public Key Infrastructure (VPKI), PKI algorithm, Elliptic Curve Cryptography (ECC), HMAC, OBU, RSU.