Research On Information Authentication And Privacy Protection Of Vehicle Ad-hoc Network

In recent years,with the rapid development of artificial intelligence,wireless technology,cars and Vehicular ad-hoc networks(VANETs),the concept of intelligent transportation systems and smart cities has become more and more popular.In this context,the potential of vehicle-mounted ad-hoc networks in providing better driving services and road safety has attracted the attention of all sectors of society.Vehicle-mounted ad-hoc networks can not only avoid or reduce traffic accidents by using the communication between vehicles and roadside units,but also provide more entertainment services for users on the road,which can greatly improve the driving environment for drivers and riders.However,open wireless network also brings a lot of security problems,such as the message in the network is easy to be distorted by forgery attack and tamper attack.In addition,due to the regularity of communication in VANET and the sharing of information and other related issues,this will expose the vehicle's driving track and the owner's personal information.In order to solve these problems,many experts at home and abroad have put forward various message authentication schemes.However,the low efficiency of message authentication in VANET has become a new problem.In order to ensure the security of VANET,improve the communication efficiency and reduce the cost of message authentication,the following researches are carried out in this paper:(1)As for the issues related to VANET,such as privacy protection and low efficiency of message authentication,this paper proposes a technology based on PKI and identity authentication and constructs a hybrid authentication scheme.It realizes the user privacy protection,real identity traceability and other security requirements,and reduces the costof message authentication.(2)In order to further reduce the overhead of message authentication in VANET,enhance communication efficiency,this paper presents a mixed authentication scheme based on proxy,the plan to introduce the concept of agent vehicles and between vehicles and roadside units to join agent vehicles as an intermediary,reuse,the concept of group communication as auxiliary,further improve the certification efficiency,reduces the certification cost.