Trust Management Schemes for Secure Routing in VANETs — A Survey

With the dynamic growth of smart devices and connectivity with vehicles, researchers are getting growing interest due to variety of enormous application scenarios. Vehicular ad hoc networks (VANETs) comprises of huge number of vehicles and roadside units that communicate with each other in several realtime scenarios and internet application services. Security in VANET is more crucial, because of different network layers and trusting on unknown intermediate vehicles. There is critical demand of efficient trust management for VANETs, because it prevents fabricated information directed by suspicious nodes connected to the network. A number of factors including lack of infrastructure, autonomous modules, auto-pilot support and dynamic topology due to mobility can result in hardening the reliable trust management solutions. In this paper, we present a comprehensive overview of trust management schemes for routing protocols. This survey specifically elaborates Trust management approaches applicable for secure release of information for real time application services. Moreover, these schemes are analyzed and presented in a tabular form to highlight the concept, methodology, algorithm, QoS and performance capabilities. It can help the researcher in this field to quickly identify the weak and strong features of schemes. We have also provided categorical discussion for comparative overview. As a finals task, we have identified open research challenges.