VANETs specially appointed systems is a sub category of MANETs. It alludes to an arrangement of smart vehicles travelled on the road. These can furnish communication with another using OBU or with RSU based on WLAN innovations. The primary favorable position of them are that they improve Information privacy and vehicle safety by shielding vehicle drivers/passengers protection from attackers. Security is a champion among the most fundamental issues associated with VANETs since the data delivered is disseminated in a spread out condition. They confront numerous difficulties. In this study, we talk about the security requirements, different attacks of VANETs and challenges.
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