Research And Implementation Of Vehicle Road Collaborative Identity Authentication Based On Domestic Encryption Chip

With the continuous development of vehicle networking technology,more and more vehicles and roadside units are starting to interconnect and exchange information.This interconnection requires the establishment of safe and reliable communication links between vehicles and roadside units to ensure that vehicles can timely and accurately obtain road condition information,traffic safety information,intelligent navigation and other services.However,in the complex environment of the Internet of Vehicles,security issues such as network attacks,malicious tampering,and information leakage often occur.Without an effective identity authentication mechanism,it can lead to unreliable data,thereby affecting the interconnection and interoperability between vehicles and roadside units.Therefore,vehicle road collaborative identity authentication has become an important means to ensure the safety and reliability of vehicle road communication.The authentication based on PKI public key infrastructure is the basic framework for vehicle and roadside unit authentication,but the authentication process involves the management and storage of keys,which are prone to problems,leading to key leakage.In order to solve the identity authentication problem in the process of vehicle road collaboration,the bidirectional design of vehicle road authentication and road vehicle authentication in vehicle road collaboration identity authentication was first carried out,a communication architecture was established,and an authentication model based on vehicle units,roadside units,and trusted institutions was built.The national domestic security chip was embedded into the vehicle unit and roadside unit as a security module for key generation and storage management;Secondly,the digital certificate technology was used to design the vehicle road authentication process.The roadside unit verifies its identity by sending a digital certificate to the vehicle;Then a road vehicle authentication scheme with roadside unit assisted communication was proposed.The roadside unit completes the authentication of the vehicle by participating in the entire process of communication between the vehicle and trusted institutions.Subsequently,the collaborative certification application scenarios between roadside units and special vehicles,illegal vehicles,and accident vehicles were analyzed.Finally,feasibility and security analysis were conducted on the road vehicle certification scheme,as well as software simulation verification.Three performance evaluation indicators,namely communication cost,average delay,and average packet loss rate,were established.Through simulation,it was found that the road vehicle certification scheme can effectively reduce delay and packet loss rates,reduce communication costs,and improve certification efficiency.Based on the road vehicle authentication scheme,a cross domain authentication scheme for automobiles using blockchain technology is proposed.Cross domain certified vehicles must register information and exchange keys with roadside units.At the same time,the roadside unit serves as a consensus node in the blockchain,uploading key data such as the identity verification code,car public key,and serial number of the vehicle that has completed local authentication to the blockchain for storage,and selecting the storage structure of the Merkel tree for data storage;Cars from other domains verify the legitimacy of their identity by retrieving their identity verification code on the blockchain;By establishing sparse Merkel paths,the process of identity data retrieval has been optimized,improving the efficiency of cross domain authentication.Finally,feasibility and security analysis,as well as software simulation,were conducted to demonstrate the feasibility and efficiency of the scheme from the perspectives of communication cost and average delay.The vehicle certification process was implemented through actual road testing.The physical design of the vehicle mounted unit and roadside unit was carried out,including the design of software and hardware.The onboard unit and roadside unit both use the T660 chipset as their control module,use the SIM8100 communication module for direct communication,and the SIM7800 communication module for cloud communication.The cloud platform of the base simulates trusted institutions for calculation and communication,and performs vehicle road authentication.The experiment obtained experimental data such as the start and end authentication times at different vehicle speeds,as well as the information loss rate and average delay in message transmission.Through the analysis of experimental data,it was found that the success rate of the vehicle road authentication scheme is around90%,indicating that the vehicle road identity authentication scheme has good robustness and reliability.