International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 03 Issue: 01 | Jan-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET ISO 9001:2008 Certified Journal Page 137 OVERVIEW OF VANET WITH ITS FEATURES AND SECURITY ATTACKS M.Newlin Rajkumar 1 , M.Nithya 2 ,P.HemaLatha 3 1 Assistant Professor, Department of Computer Science, Anna University Regional Centre Coimbatore 2 P.G Scholar, Department of Computer Science, Anna University Regional Centre, Coimbatore 3 P.G Scholar, Department of Computer Science, Anna University Regional Centre, Coimbatore Abstract-Vehicular Ad-Hoc Network (VANET) is created by using principles of Mobile Ad-Hoc Network (MANET) for impulsive creation of wireless network for enhancing the data to domain of vehicles. Safety is an important aspiration for VANET in view of the facts that improved safety which reduces accidents and consequently improve traffic conditions and yet save lives. The security of VANETs is vital as their existences relate to grave intimidating situations. The security is most decisive issues because their information is broadcast in open access environments. It is obligatory that all transmitted data can be injected or changed by users who have malevolent goals. The problem of VANET is difficult to solve because of the size of network, vehicle speed, their relative geographic positions, and the arbitrariness of the connectivity between them. In this article here going to discuss about VANET along with its securities and their attacks. Keywords : VANET standards, Securities, Attacks. 1. Introduction VANET is a type of network that wires a enormous field of mobile circulated applications which runs in vehicle. Vehicular Ad-hoc Network (VANET) should be an exacting form of the Mobile Ad-hoc Network (MANET) where the vehicle acts as the mobile nodes within the network exposure with stay on connection; the node should communicate with each other through single hop or multi hop. Here the node can be a vehicle, Road Side Unit (RSU). It had better dispensation and storage capability. It is a key component of Intelligent Transportation System (ITS). It also a generic term in Inter Vehicle Communication (IVS). In research area it made more interest for developing more service and security applications. The ultimate goal of VANET is to provide road safety information among the nodes hence the frequent exchange of such type of data on the network clearly signifies the role of the security. 2. Overview The Intelligent Transportation Systems (ITS) main aspire is to offer solution for accidental protection of passengers and the traffic overcrowding problems. The ITS enhanced wellbeing and driving surroundings with integrating information technology in transport systems. The possible types of communications: Vehicle To Vehicle (V2V): It provide interaction within vehicles in ad hoc approach. In V2V, a vehicle can accept broadcast and exchange helpful traffic news i.e., traffic conditions and road accidents in particular area or with other vehicles. Vehicle to Infrastructure (V2I): In this communication type, the information will be broadcast between the nodes (i.e vehicle) and the infrastructure (said as ITS), to discuss about valuable information such as road conditions and safety events which have been taken into account. In this V2I, a vehicle (node) launches a connection between RSU and contact with external networks which is internet. 2.1 Characteristics of VANET VANET is a infrastructure less network in which the node can said to be a Road Side Unit(RSU) or the moving vehicle. It provides a combination of wireless medium methods and the characteristics ad hoc network which uses a different topology for communication and infrastructure dependent modes. VANET is an application of MANET which had its distinct characteristics can be summarized as: High Mobility: In VANET, the node moves at high speed that condenses the mesh in the network. So that it is hard to calculate the vehicle position and to provide security for node privacy. Rapidly changing network topology: The node in VANET is high mobile in nature and the speed of vehicle should also random, so that the node position will change frequently. The topology is dynamic and unpredictable. It