Research On The Privacy-preserving Scheme For Internet Of Vehicles Based On Identity

Vehicular Ad-hoc Network(VANET)is a traditional Mobile Ad-hoc Network(MANET)application on traffic roads.It is a special mobile ad-hoc network.The concept of Internet of vehicles(IOV)comes from the development of Internet of things(IOT)industry.With more vehicles connected to the Internet of things,the concept of VANET has gradually evolved into IOV.However,due to the particularity of its communication mode and the diversity of participating entities,the environment of IOV is complex and changeable,and is vulnerable to malicious attacks,which will lead to the danger of driving and even threaten human safety.Based on 5G communication mode,it can connect vehicle edge computing with cloud in real time,provide services including automatic driving,and finally achieve full automatic driving.In recent years,privacy-preserving has become a key research issue in the development of Internet of vehicles.Based on the study of the architecture and key technologies of IOV,this thesis proposes two identity based privacy-preserving schemes.On the basis of meeting the security requirements of unforgeability,privacy-preserving,traceability and revocability,it can reduce the communication delay,packet loss rate and improve the authentication efficiency,so as to improve the security of the whole network.Finally,we use the Veins framework,which uses C + +based sumo and OMNeT + + as the traffic and network simulation platform.The main research contents and innovations are as follows:(1)On the basis of further analysis and summary of the architecture of the Internet of vehicles,this thesis studies the main communication technologies of IOV at the present stage,i.e.dedicated short-range communication technology and cellular Internet of vehicles technology.At the same time,VANET and IOV are compared in detail from the aspects of commercialization,design objectives,network architecture,Internet services and network perception.The basic security requirements of Internet of vehicles and the classification of common network attacks and security threats aregiven.(2)This thesis proposes a two-way authentication scheme based on identity,using hash function to reduce the complexity of the algorithm,using Schnorr algorithm to improve the stability of the scheme,using elliptic curve encryption to shorten the key and reduce the amount of computation.Two-way authentication between communication nodes is carried out to prevent malicious node attacks.In the communication process,shared key is used.Identity ID is used to realize the authentication of RSU to OBU,and handshake principle is used to realize the authentication of OBU to RSU.Using the unique advantages of RSU,the main information of the system is stored in RSU,which can reduce the communication delay,packet loss rate,improve the efficiency of signature authentication,and improve the security of the whole network.The results show that on the basis of meeting the security requirements,this scheme is more efficient in authentication,and reduces the storage capacity requirements for OBU,thus ensuring the legitimacy of communication nodes.(3)Based on the blockchain,this thesis proposes a cross domain authentication privacy-preserving framework for IOV,and constructs a new decentralized privacy-preserving system.According to the system characteristics of the blockchain,we can effectively use the Merkel Patricia tree to expand a new blockchain structure.The blockchain network is composed of cloud service providers,roadside units and vehicles,and the trust relationship is built through smart contracts.We can fully consider the impact of different trust domains in the authentication process of vehicle and cloud service provider.In this thesis,based on the public key cryptosystem,the authentication scheme is designed to avoid the key storage defects in the symmetric key authentication scheme.In the scheme,the trusted agent is introduced,and the inter domain authentication queries the validity of the corresponding nodes in the blockchain through the proxy server.The scheme includes node registration,vehicle and roadside unit authentication,vehicle and cloud service provider authentication,vehicle and vehicle authentication,roadside unit and cloud service provider authentication,etc.Theresults show that this scheme can reduce the system overhead and improve the authentication efficiency on the basis of meeting the privacy protection security requirements of the Internet of vehicles.