A secret push messaging service in VANET clouds

The vehicular ad hoc network (VANET) is related to the very nature of wireless communications and the rapid movement of the vehicles; therefore, network security is a critical concern for designers of VANET clouds. The main issues to be addressed in this paper are how to provide future VANET clouds with more safety, more effectiveness and more correct messaging services—especially when there is traffic congestion and accidents, message effectiveness and correct transfer. Even though tens of kilometers away from the accident, other vehicles are informed of situations with road traffic accidents through the on-board unit devices and then given recommended travel routes and related suggestions. This will significantly improve traffic flow and provide better quality of traffic. Cryptography in this paper will be discussed to meet the vehicle privacy and information security needs, as well as bilinear pairing function to solve security problems. In performance, it is expected to reduce more than 25% of the message delivery times, and when the vehicle passes through more roadside units, more than half of the message can reduce delivery times if the number of RSUs is more than 50. In security, the key is effective protection, with only authorized vehicles verified to get the message and meet forward secrecy, backward security and avoid replay attack, Sybil attack and other threats.