IN-VEHICLE NETWORK OTA SECURITY COMMUNICATION METHOD AND APPARATUS, VEHICLE-MOUNTED SYSTEM, AND STORAGE MEDIUM

WIPO Patent Application WO/2023/087423

A1

An in-vehicle network OTA security communication method and apparatus, a vehicle-mounted system, and a storage medium. The method comprises: sending a communication request to a sub-processor, and receiving a first random number generated by the sub-processor and a check code generated based on the first random number and a root key (101); after the check code is verified to be correct, generating a second random number, concatenating the second random number and the first random number into a random number set, and sending to the sub-processor the random number set and a check code generated based on the random number set and the root key (102); after receiving the information that the verification by the sub-processor succeeds, deriving a temporary communication key on the basis of the random number set for encrypted communication with the sub-processor, and issuing an upgrade package to the sub-processor (103); and after the upgrade package is sent, ending a session and invalidating the temporary key (104). The key for each encryption is randomly generated during in-vehicle network communication, and the OTA service is different each time, thereby avoiding key leakage and replay attacks, and ensuring the security of in-vehicle network OTA communication.

CHEN XI (CN)
ZHENG XUMING (CN)
WU YONGBO (CN)
SHUANG JIANPING (CN)

PCT/CN2021/135874

May 25, 2023

December 06, 2021

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CHENGDU KAWA TECH CO LTD (CN)

H04L9/32; H04L9/08

CN112994898A	2021-06-18
CN113411285A	2021-09-17
US20190068381A1	2019-02-28
US20190394046A1	2019-12-26

YOGO PATENT AND TRADEMARK AGENCY LIMITED COMPANY (CN)

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