A Survey on Detection and Prevention of Security Attacks in VANET

In the current generation, road accidents and security problems increase dramatically worldwide in our day to day life. In order to overcome this, Vehicular Ad-hoc Network (VANETs) is considered as a key element of future Intelligent Transportation Systems (ITS). With the advancement in vehicular communications, the attacks have also increased, and such architecture is still exposed to many weaknesses which led to numerous security threats that must be addressed before VANET technology is practically and safely adopted. Distributed Denial of Service (DDoS) attack and Sybil attacks are the significant security threats that affect the communication and privacy in VANET. As simulators are being used in our work, we have discussed OMNET++ which is a new modernized latest mobility and network simulators as well as data network simulator. This is also integrated with the road traffic simulator SUMO with Veins, an open-source framework for VANET simulation. An in-depth survey of a new innovative technology called as Vehicular Cloud Computing (VCC) which has an enormous impression on ITS by utilizing the assets of vehicles such as the internet, storage, Global Positioning System (GPS), computing power for creating a quick judgment including the transmission of information between the cloud and VANET. In addition to providing the usage and approach of vehicular cloud, a short survey of the routing protocols, major security threats, attacks and even security solutions for cloud computing have also been surveyed. An extensive survey has been done on the architecture of VANET, existing protocols, prevalent security attacks etc. and after analysing the pros and cons of the existing algorithms, the objective of this our work is to design an algorithm to detect and avoid various kinds of attacks using Vehicular Cloud computing. An analysis has also been done by applying four protocols on an existing scenario of real traffic simulator using OpenStreetMap and the best suitable protocol has been selected for further application.