Trust Management in Vehicular Ad hoc NETwork
A vehicular ad hoc network (VANET) is a self-organized network that can be formed by connecting vehicles equipped with on-board units. Two types of communications are provided in VANET: vehicular-to-vehicular and vehicular-to-infrastructure. In the first communication type, vehicles communicate directly, whereas in V2I, vehicles communicate through routers called road side units (RSU). Trusted authorities control the network. VANET can be used in several cases. However, the main applications of VANET are oriented to safety issues. In such context, a security problem can have disastrous consequences. In fact, an attacker can be tempted to forward false information in order to obtain some privileges such as road liberation, etc. Hence, evaluating the reliability of transmissions is vital. Trust can be used to promote such healthy collaboration. In fact, trust enables collaborating vehicles to counter their uncertainty and suspicion by establishing trustworthy relationships. The main contribution of this chapter is then the proposition of a trust-based security scheme for VANET.