Merged technique to prevent SYBIL Attacks in VANETs

Vehicular ad hoc Network (VANET) are a class of ad hoc systems work to guarantee the safety and security of traffic. An important point in VANET is the manner by which to believe the data transmitted when the neighboring vehicles are quickly changing and moving all through range. The fundamental point of this paper is to distinguish Sybil attack in VANET. A two phase security based mechanism is proposed to give reliable solution in identifying and blocking the Sybil attacked nodes to secure the information and providing safety and trust on the application. In the first phase Public Key Infrastructure (PKI) is taken and in the second phase hash function is considered. In this way to defeat Sybil attack we can easily recognizing Sybil attacks in VANET with much accurate.