Research On Application Technology Of Cryptographic Algorithm For Intelligent Networked Vehicles

In recent years,intelligent transportation has become a hot research field.As the core element of intelligent transportation,intelligent networked vehicles have gradually attracted wide attention from all walks of life.Through the organic combination of the Internet of Vehicles(Io V)and intelligent vehicles,equipped with advanced on-board sensors,controllers,actuators and other devices,with the integration of modern communication and network technology,intelligent networked vehicles have realized the exchange and sharing of intelligent information between vehicles and people,vehicles,roads and backstage,which greatly promotes the development process of vehicle intelligence.However,there are still many problems in the intelligent networked vehicles,while the traditional vehicles are networked,intelligent and functionally improved.For example,when in-vehicle information is transmitted on the CAN bus,its encryption strength is low,the encryption time is longer,and the support for the application of domestic cryptographic algorithms is low;In the authentication of vehicles and roadside units,there are security problems such as easy tampering and forgery of messages,posing a great threat to the development of intelligent networked vehicles.It is urgent to do related research work focusing on the above issues.Combined with the background of the formal implementation of the Code Law of the People’s Republic of China,this paper proposes a new kind of applied technology based on domestic cryptography algorithm and the field of intelligent networked vehicles.While ensuring the security and integrity in the process of information transmission,a new block chain model is designed to determine the identity of the information provider,so as to contain the false information sent by malicious nodes from the root.The main work of this article is as follows :First of all,this paper systematically investigates the technology development status of intelligent networked vehicles,and analyzes the current security issues facing the field of intelligent networked vehicles.Based on the analysis of the current mainstream in-vehicle encryption algorithm AES and the corresponding SM4 domestic encryption algorithm,combined with the characteristics of the transmission of short messages and low latency in the intelligent networked vehicles,the programmable logic controller is used in combination with the vehicles,and SM4 national secret algorithm program module is designed and implemented.Based on the application of international cryptographic algorithms in the Sec OC structure,the feature of localized substitution of cryptography is realized.At the same time,it is optimized from both the SM4 algorithm structure and the car-side hardware design,so that the Sec OC structure greatly improves the support of the SM4 national encryption algorithm,and to a certain extent improves the encryption and decryption speed of the message transmission in the car.Secondly,in view of the problems,such as the core nodes in the traditional identity authentication system highly dependent on the third-party trusted authority(CA),the core nodes extremely prone to failure after being attacked,the traces of the authenticated trusted node after being attacked easy to erase and unable to be verified afterwards,combined with the characteristics of the complex network environment,the large number of access nodes and strong randomness,the high demand of single node authentication load,and the inability to form a unified common trust root node,higher requirement of single node authentication load,and unable to form a unified common trust root node,we adopt the blockchain technology to build a decentralized hyperledger and design a new blockchain model based on zero-knowledge proof technology,with the national secret algorithm as the entry point,targeted to build a credible identity authentication system under the complex network environment of intelligent connected vehicles,and solve the problems encountered in access node registration,data fragmentation storage and identity rights management in intelligent networked vehicles.Finally,this paper is verified in the simulation vehicle experimental environment.By setting up group experiments,analyzing and comparing the encryption efficiency of SM4 encryption algorithm under different plaintext lengths,and the performance of SM4 national encryption algorithm and AES international encryption algorithm under the same plaintext length,the effectiveness of the SM4 program module implemented in this paper is verified;and the blockchain model system is tested for pressure,performance,and reliability.Through the test,it can be known that the system can well meet the above demands and the certification time is also within the controllable range.