Secured Routing in VANETs Using Lightweight Authentication and Key Agreement Protocol

Vehicular Ad hoc Network (VANETs) allows the vehicles on the roads to form a self-organized network and is blooming up in a exotic way to support intelligent transportation services. In VANETs, the vehicles are the nodes and hence move at very high speed leading to frequent changes in topology resulting in loss of data that causes failure in data reliability. Consequently ensuring security and routing in VANET remains to be a highly challenging and complex task to design. The existing protocol using SHA, suffers from exorbitant delay because of the large key size. To overcome this limitation, a lightweight authentication protocol using key agreement protocol for VANETs, which uses public key encryption scheme and Opportunistic Adaptive neighbour Selection-Vehicle Localisation (OANS- VL) protocol is proposed in this paper. It provides high security, less network delay and better packet delivery ratio compared to the existing protocol. The test bed scenario is implemented using NS2 tool for simulation analysis and the same has been analyzed to obtain the performance metrics.