Azam hesami - Msc Student of Computer Software, Department of Computer Engineering, Gorgan science and Research Branch, Islamic Azad University, Gorgan, Iran
mehdi aminian - Department of Computer Engineering, Guilan University, Rasht, Iran
Seyed Hassan Hosseini - Msc Student of Computer Software, Department of Computer Engineering, Gorgan science and Research Branch, Islamic Azad University, Gorgan, Iran

In the near future, most new vehicles will be equipped with short range radios capable of communicating with other vehicles or with highway infrastructure at distances of at least one kilometer. The radios will allow new applications that will revolutionize the driving experience, providing everything from instant, localized traffic updates to warning signals when the car ahead abruptly brakes. While resembling traditional sensor and ad hoc networks in some respects, vehicular networks pose a number of unique. The attributes of VANET posture both difficulties and opportunities in accomplishing security objectives. Giving security to VANET is essential in terms of giving client validation, anonymity, honesty and protection of information. In this paper we have talked about the different techniques related to security in VANET. After going through all the techniques, a comparison has been made between the various techniques and the security concerns

VANETs, Attacks, Threats, Security