According to the lightweight communication encryption method and device among the multiple ECUs in the vehicle, a CAN frame encryption list is defined in each ECU in the whole vehicle, only CAN frames containing important signals are encrypted, and other CAN frames still adopt plaintexts for information interaction. Besides, in order to guarantee safety, a session key updating management algorithm is designed, in the algorithm, session keys are periodically and indirectly updated through random numbers of the main management node ECU, the random numbers are transmitted from the main management node ECU to other node ECUs through an advanced encryption algorithm, although operation of the advanced encryption algorithm is time-consuming at a time, the operation frequency is low, and the operation efficiency is high. And the overall influence on the computing power of the ECU is small. Therefore, not only can the advantages of simple and convenient information interaction and high efficiency among the ECUs in the vehicle be taken into consideration, but also the requirement of information security can be met.

    本申请公开的一种车内多ECU间轻量级通讯加密方法及装置,通过在整车内各ECU中定义一个CAN帧加密列表,并只对包含重要信号的CAN帧进行加密,其它CAN帧则仍然采用明文进行信息交互。另外,为了保证安全性,设计了会话密钥更新管理算法,在该算法中,会话密钥周期性通过主管理节点ECU的随机数间接更新,并且随机数从主管理节点ECU至其它节点ECU的传递采用高级加密算法,尽管运行高级加密算法单次费时,但运行频率低,对ECU算力整体影响不大。这样不仅可以兼顾现有车内各ECU间信息交互简便、效率高的优点,还能够满足信息安全的需求。


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    Title :

    Lightweight communication encryption method and device among multiple ECUs in vehicle


    Additional title:

    一种车内多ECU间轻量级通讯加密方法及装置


    Contributors:
    XU SHUAIQING (author) / ZHANG YANSHANG (author) / LI ZHEN (author) / SONG JINLING (author) / CUI CHUANWEN (author) / WANG YONGJIE (author) / ZHANG BINGTING (author)

    Publication date :

    2025-03-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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