Vehicular ad hoc networks (VANETs) are under active development phase, especially due to the latest and foremost wireless communication and networking technologies. Basically VANETs consist of some parts which play the major role to enable message authentication between vehicles which are on-board units as well as roadside units. To reduce the load on trusted authorities several roadside units are set up and message authentication using proxy vehicles has been proposed. This used to minimize the computational overhead of roadside units significantly. Due to this message authentication scheme the efficiency of roadside unit improves. In this paper we propose an Efficient Hybrid Message Authentication Scheme (EHMAS) that deals with the technique where it not only guarantees message authenticity, but it is also resistant against impersonation and modification attacks. First we explain the properties of the attacks in security model. Second we provide an EHMAS scheme where a novel authentication technique is proposed for registration and verification of users using elliptic crypto system. Finally the paper concluded with the scope of the proposed work and provides future enhancement using machine learning techniques.
Towards Identity-based Conditional Privacy-Preserving Authentication Scheme for Vehicular Ad Hoc Networks
