Recent techniques used for preventing DOS attacks in VANETs

VANETs are network of vehicle which is formed dynamically for short duration. Due to this they are susceptible to various types of attacks. This paper discusses the recent techniques used to counter various types of attacks that threaten the VANET. Researchers have proposed many solutions to solve these problems. This paper discusses all the most relevant solutions and analyzed them according to various parameters like end-to-end delay, throughput, packet delivery ratio etc. The strengths and the research gaps of these solutions have been also discussed. First the paper discusses about the need of the VANET and the main challenge faced by it i.e., security. Second part discusses the various effective techniques that can be used to detect DOS attacks. Then the algorithms proposed by various researchers using these techniques to detect various DOS attacks have been analyzed. Finally the paper discusses the differences between various techniques which can lead to a better detection and prevention scheme against DOS attacks.