A survey on authentication schemes of VANETs

Vehicular Ad hoc Network (VANET) is a type of Mobile Ad hoc Network (MANET) which is formed by mobile vehicles, Regional Trusted Authority (RTA) and fixed Road Side Units (RSU). Communication among vehicles has to be established in a secure way in order to identify attackers in the network and also to isolate them from the network. Different authentication schemes have been proposed for this purpose. In this paper, we summarize various authentication schemes which have been proposed for VANETs to establish secure communication. These schemes are discussed elaborately and then a comparison based on their security features and capabilities are carried out.