Research On Self-Healing Conditional Privacy Protection Authentication Scheme In Vehicular Ad Hoc Network

As the core of intelligent traffic management,vehicular ad hoc network plays an important role in solving traffic congestion,traffic safety and other problems.However,nowadays,VANET is facing many challenges and difficulties.On the one hand,VANET uses wireless communication and malicious users can achieve their own goals by spreading false information,intercepting communication or stealing privacy data of users,which will threaten the security of VANET.On the other hand,rapid network topology changes and complex application environments may make vehicles lose contact with the communication network,which will affect the communication efficiency of VANET,and even cause serious traffic accidents.For these problems,this thesis designs a self-healing privacy protection authentication schemes in VANET and a self-healing aggregation authentication scheme based on 5G communication environment in VANET.The contributions of this thesis are as follows:1)This thesis proposes a privacy protection authentication scheme based on the semitrusted management center in VANET.Firstly,the proposed scheme does not rely on the trusted management center,so its security is stronger.Secondly,the proposed scheme uses the distributed idea to manage pseudonyms of vehicles,which realizes the conditional privacy protection.At the same time,the proposed scheme uses the group key to encrypt communication messages,so vehicles do not need to store and query revocation lists.Finally,the proposed scheme realizes the self-healing of vehicles,that is,vehicles can recover the group key by themselves,which improves the communication stability and efficiency of VANET.2)This thesis proposes a secure and practical aggregation authentication scheme for 5Genabled vehicle platoon.The proposed scheme is based on 5G communication network.Firstly,the vehicle platoon manager is jointly selected by platoon members,without the participation of the management center.Secondly,the proposed scheme adopts distributed key management.The communication key is generated jointly by the management center and the vehicle,and the data stored in vehicles will be updated regularly,so attackers cannot get effective information from vehicles,which can effectively resist side channel attack.In addition,the proposed scheme realizes the self-healing of vehicle communication and improves the communication efficiency.