Research On Anonymous Authentication And Key Agreement Protocol For Internet Of Vehicles

Recent years,with the rapid development and deployment of 5G,cloud computing,on-board equipment and roadside facilities,the discussion on the Internet of vehicles has been in a hot position.In the Internet of vehicles,vehicles on the road can exchange information with other vehicles or infrastructures within their communication range to ensure driving safety and improve driving experience.However,because the vehicle is in an open road environment that is vulnerable and unprotected,the information exchange process in the Internet of vehicles is more vulnerable to malicious attacks.Since vehicles are usually moving at high speed,any potential safety hazard in the network may directly lead to real safety problems and even traffic accidents.For example,false road information may lead to road congestion,and false early warning and alarm may greatly improve the incidence of accidents.At the same time,privacy disclosure is also a problem in the Internet of vehicles.How to protect the privacy of vehicle users such as identity,route and personal habits on the basis of ensuring the traceability of information in the network is also the focus of common concern from the government,enterprises and consumers in recent years.Therefore,in order to solve the security and privacy problems of kinds of information interaction in the Internet of vehicles communication scene,this thesis studies the anonymous authentication and key agreement protocol in the Internet of vehicles scene,and completes the following work:Firstly,this thesis analyzes and improves the existing anonymous message authentication schemes based on vehicular hardware security module（tamper proof device）,and puts forward a new scheme.Compared with previous schemes,the new scheme allows vehicles to use the same pseudonym identity to sign messages for many times without causing security problems.By assigning different secret values to each vehicle to generate pseudonym identity and private key for signing messages,it avoids storing the same secret value in the tamper proof device of different vehicles,and enhances the non-repudiation when tracing the real identity of the signer.Then,this thesis proposes a new pseudonym identity construction method based on hash chains,and constructs an anonymous message authentication scheme with efficient identity revocation based on this construction method.In the scheme,the TA can revoke the unexpired pseudonym identity issued to the vehicle by broadcasting the revocation list.The length of the revocation list is only related to the number of vehicles to be revoked,but not to the number of pseudonyms issued,which helps to reduce the communication and storage cost of relevant entities in the system,so that the TA can issue more pseudonym identities to the vehicle at one time without considering the revocation cost,so as to improve the pseudonym replacement frequency of the vehicle and protect the privacy of vehicle users better.Finally,this thesis designs an anonymous authentication key agreement scheme for collaborative fleet management,an application scenario of Internet of vehicles.Based on this scheme,vehicles on the road can freely establish a cooperative fleet and become its manager,limit other vehicles accessing the fleet based on their credit level,and efficiently generate,distribute,update the group session key,so as to build a secure and easily maintainable encrypted communication environment in the fleet.