Sudha et al, International Journal of Computer Science and Mobile Computing, Vol.8 Issue.5, May- 2019, pg. 187-192 © 2019, IJCSMC All Rights Reserved 187 Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology ISSN 2320–088X IMPACT FACTOR: 6.199 IJCSMC, Vol. 8, Issue. 5, May 2019, pg.187 – 192 Analysis of Sybil Attack Isolation Technique in VANET Sudha Research Scholar, Swami Devi Dyal Institute of Engineering and Technology, Barwala, Haryana, India sidkkr27@gmail.com Mr. Kamal Kumar Head of Department, Swami Devi Dyal Institute of Engineering and Technology, Barwala, Haryana, India kamalkumar2661987@gmail.com Dr. Rahul Malhotra Director Principal, Swami Devi Dyal Institute of Engineering and Technology, Barwala, Haryana, India director@sddgpi.com Abstract: The vehicular ad hoc network is the decentralized type of network in which vehicle nodes can join or leave the network when they want. The vehicular network is much vulnerable to security attacks which affect network performance. The active attacks are those which reduce network performance in terms of certain parameters. This paper is related to Sybil attack. The techniques which are proposed for the isolation of Sybil attack is reviewed and analyzed in this paper. The techniques are implemented in the network simulators and results are analyzed in terms of certain parameters. Keywords: Sybil attack, AODV, VANET, Active Attack Introduction The Vehicular ad hoc networks are the most prominent research area for the research purposes due to their increase in demand of usage. The vehicles and the elements that are present at the roadside are connected to each other for the purpose of communication and this network is self-configuring in nature. They do not require any fixed infrastructure for them. The transferring and receiving of the information back and forth holds the current traffic conditions of the network. Wi-Fi is the new latest technology used for the purpose of initiating the implementation of vehicular ad hoc networks. For the purpose of communication in VANETs the new Dedicated Short-Range Communication (DSRC) method is proposed [1]. The low latency and high data rate is ensured with the usage of this technique as it provides the short and medium range communications within it. The organizations which are build up in a certain building with less distances, the communication channels are changed more recently, and also the time provided to connect to the vehicles is less use this kind of techniques. With the absence of an automatic intelligent design for building an efficient protocol configuration in VANETs is not