Abstract: VANETs have been appeared as a new area of data dissemination process in which vehicles provide aid to the end users. Vehicles in vehicular ad hoc network have highly unstable (dynamic) topology which produces hindrances in timely delivery of sensitive messages Vehicular Ad-hoc networks (VANETs) are very likely to be deployed in the coming years because of the safety requirements and thus become the most relevant form of mobile ad hoc networks. Security is the main issue in VANETs because of the main use of the VANETs is for safety related application and in that case the viability of the security may cause harm to human lives. In this paper, we address the security issues of this networks and its consequences overhead in VANETs.

Keywords: vehicular ad hoc network (VANETs), cluster head (CH).