RSU authentication by aggregation in VANET using an interaction zone

Vehicular ad-hoc network (VANET) is an innovation that will change our vision of road traffic, it will improve the safety and the efficiently of transport. VANET represent a target for attacks that can cause human and material losses. This, highlights the need for a robust security system, who must secure effectively communications between vehicles and the different network's entities, but also, it must guarantee availability and fluidity in the transmission. Specifically, in transmission of messages from Road Side Unit (RSU) to vehicle (R2V), our security aims to ensure identification, authentication, non-repudiation and integrity for the RSU. An aggregation of identification will be achieved by multiples RSU and without asking for the intervention of a trusted third party. In this paper, we proposed a security schema to firstly ensure identification for RSU by an Elliptic Curve Diffie-Hellman (ECDH) algorithm where the vehicle confirms that the two neighbours RSU have the same shared secret, then secondly the vehicle authenticates the message beforehand signing, using Elliptic Curve Digital Signature Algorithm (ECDSA). To simulate the vehicle scenario, we used the OMNET++, SUMO and VEINS combined environment, and we integrated on it the Crypto++ library to achieve the security requirement. Our proposed model ensures stronger security.