Trusit centric approach based on similarity in VANET

VANET (Vehicular ad hoc network) is a network which mainly consists of mobile nodes which are categorized by high speed, dynamically changing topology, lack of any central authority, relationship between nodes are often short lived. It is a network which mainly focus on providing applications which save human lives and provide comfort to drivers during driving. So, Communication which are of two types, vehicle to vehicle (V2V) or Inter-vehicle Communication(IVC) and vehicle to Infrastructure(V2I) or Vehicle to Road Side Units(V2R), plays a major role because there is need that safety message to delivered on time without being any manipulation done by the intermediate nodes. Security plays a major role in VANET for the reliable and efficient delivery of message, Trust a key element of security. It is basically a belief which one node has over the other when it receives information from it. This trust can either be on the node i.e. Entity Centric Trust which provided the information or this trust can be developed on information provided by the node, that is data centric trust or can be on both node as well as on information, that is combined trust. In this, we focus on data centric approach and introduce a similarity metric aided by the infrastructure, to propose our own trust model. Simulation results, shows the accuracy of our trust scheme in respect with the introduction of malicious data.