An Enhanced Timestamp-Based Security Mechanism to Detect Sybil Attack in vehicle ad hock network (VANETs)

Abstract

Within the VANET subset of Mobile Ad-hoc Network (MANET), automobiles can communicate with one another via roadside infrastructure or vehicle-to-vehicle communication. However, because nodes move around and topologies might alter at random, there could be a potential of attacks in a VANET. One well-known attack is the Sybil attack, in which the attacker assumes many wrong identities to interfere with the VANET's ability to function. Numerous solutions have been put forth in the literature to identify Sybil attacks. The authors of the recent work have developed a timestamp-based Sybil node discovery method. Every vehicle on the road in VANET is given a unique certificate by RSU, which is included in this work timestamp. We applied the Ad-hoc On-Demand Distance Vector (AODV) Routing protocol and timestamp as a hash function of the public key with addition of the speed of the vehicle in the planned work for node detection and data transmission. In addition, we used the NS2 simulator for Sybil node detection.