Research On Privacy Preserving And Security Authentication Protocols In The Internet Of Vehicles

With the increase in the number of vehicles and drivers,the occurrence of traffic accidents and congestion has significantly risen.In order to enhance travel safety,the research focus has shifted to vehicle-to-vehicle(V2V)and vehicle-to-infrastructure(V2I)communication technologies,collectively known as the Internet of Vehicles(Io V).By connecting vehicles,roadside units,and cloud servers through the Io V,there is a seamless exchange of data among these entities,providing comprehensive road traffic information to drivers and traffic managers.However,when utilizing wireless network communication in the Io V,the openness of wireless networks allows adversaries to eavesdrop,tamper with,and replay transmitted data,leading to the dissemination of false traffic information.Moreover,attackers can track specific vehicle-related data to obtain sensitive information such as location and travel routes,posing a threat to the personal safety of vehicle owners.Therefore,it is imperative to provide both message authentication and privacy protection in the Io V.To address these challenges,this thesis proposes two secure communication solutions for the Internet of Vehicles,and the main contributions are as follows.(1)A practical warning message sharing scheme is proposed with the aim of preserving the privacy of vehicles and achieving message authentication during communication.The scheme covers the entire cycle of vehicle participation in Internet of Vehicles communication.Specifically,the scheme includes two stages: registration and login,and data interaction.The scheme designs an efficient authentication key agreement scheme,allowing vehicles to register only once in a trusted authority and then apply for pseudonyms and partial private keys multiple times through a public channel.In addition,the scheme adopts certificateless signature and designs a new pseudonym construction method,while providing conditional privacy preserving and message authentication.Finally,under the random oracle model,the scheme is proven to withstand various attacks from the threat model,and its performance is evaluated through experimental simulations.(2)A fleet management scheme aimed at improving vehicle cooperation efficiency in road traffic is proposed.The core of the scheme is the authentication of fleet members by the fleet manager,and the distribution of fleet communication keys using a tree structure to ensure the security of data in fleet communication.Compared with other methods,this scheme overcomes certificate management and key escrow problems and provides forward security and backward security.In addition,the scheme provides conditional privacy preserving,implements reputation management for vehicles,and limits the entry of malicious vehicles to ensure the safety of the fleet.The security analysis and performance analysis of the scheme are conducted,indicating that it can meet the requirements of both security and efficiency of the Internet of Vehicles.