关键词: 智能网联汽车, Can总线安全通信, SecOC安全机制, 国密SM4算法, 应用方案

Abstract: Intelligent connected vehicles have functions such as high-speed network connection, complex environment perception, intelligent decision-making, and collaborative control.With the rapid development of the Internet of Vehicles, intelligent connected vehicles can obtain more intelligent services in the Internet of Vehicles, but they also face more security threats.At present, the communication between ECUs based on the CAN bus in the vehicle lacks a secure communication mechanism, once an attack from the external network of the vehicle enters the internal network of the vehicle, the vehicle will be controlled by hackers.,therefore, the research on the secure communication mechanism of the vehicle internal network is very important.This paper introduces the principle of the SecOC secure communication mechanism in the AUTOSAR specification in detail,studies the symmetric encryption algorithm for generating MAC,considering the healthy development of China's automobile industry in the future, it is recommended to use the national secret SM4 algorithm to implement the SecOC security framework,the paper explains the implementation principle of the SM4 encryption algorithm,taking into account the high real-time requirements of the in-vehicle network communication, the paper focuses on the application of the SM4 algorithm, testing and analyzing the performance of the SM4 software, and discussing the hardware implementation mechanism supporting the national secret SM4, and prospects the future application of the program.

Key words: intelligent connected car, CAN secure communication, SecOC security mechanism, SM4 algorithm, application solution