Security Attacks, Requirements and Authentication Schemes in VANET

Vehicular Ad-hoc Networks (VANET), the promising technique, is getting attention for managing the traffic efficiently and making the road safe. The topographies and its vast applications varying from road safety, to the traffic management, payment service to infotainment. VANETs are characterized as a self-organized, distributed, highly mobile, dynamic topology, unconstrained power, computational and storage networks. The communication in VANET is performed in open-access environment which demands the security issues must be deal with utter importance. Security requirements includes authentication, availability, message confidentiality, message integrity, data availability, access control, privacy, message non-repudiation and real time guarantees of message delivery. In order to have a secure and efficient VANET infrastructure, an extensive overview of characteristics, challenges, security attacks and requirements must be dealt with. The prime objective of this paper is to provide a classification of security requirements, security characteristics and challenges.