A Survey on Trust & Trust-Based Schemes In VANETs

Vehicular Ad-hoc Network (VANET) is a sub class of mobile ad-hoc networks. VANET provides wireless communication among vehicles and vehicle to road side equipments. The communication between vehicles is used for safety, comfort and for entertainment as well. The performance of communication depends on how better the routing takes place in the network. The life saving factor is also the key issue in this regard. Trust is key part of security and it is undoubtedly a necessity to develop trust in vehicular network. Trusted routing in VANET is a challenging task due to the lack of infrastructure, openness of wireless links and the usually highly dynamic network topology. In this paper, we have studied challenging characteristics in VANET entourage, trust and characteristics of trust VANETs, and security requirements and attacks. Few existing trust-based frameworks have been studied in depth to understand the lack of trust in VANETs and to develop an effective trust-based scheme.