Security protocol for VANET by using digital certification to provide security with low bandwidth

Vehicular ad hoc networks (VANETs) are receiving increasing attentions from academia and deployment efforts from industry, due to the various applications and potential tremendous benefits they offer for future VANET users. Wellbeing information switch over enables life-critical applications, such as the alerting functionality during connection traversing and lane integration, and thus, it plays a key role in VANET. In a VANET, vehicles will rely on the integrity of received data for deciding when to present alerts to drivers. The communication between car to car, car to roadside unit done through wireless communication. That is why security is an important concern area for vehicular network application. In VANET some serious network attacks such as man in middle attack, masquerading is possible. In this paper we have proposed an algorithm in order to overcome these network attacks via low message passing and try to reduce the bandwidth at the time of authentication, message passing. For analysis and check the security of our protocol we have analyzed the proposed protocol with the existing protocol based on computational cost and performance time. Finally we have compared our algorithm with existing algorithms..