In-vehicle network ota security communication method and apparatus, vehicle-mounted system, and storage medium

Abstract

Disclosed are an in-vehicle network OTA security communication method and apparatus, a vehicle-mounted system. According to the present disclosure, the temporary key is generated through the random numbers and the root key in the in-vehicle network, integrity check is performed with the MAC value, the master node and each child node of the in-vehicle network need to be subjected to identity authentication before performing OTA service, and the OTA service may be started only after the authentication succeeds. During the service process, data that needs to be exchanged between the master node and each child node, including various commands, upgrade package content, upgrade progress transmission and other data, may be encrypted, the key for each encryption is randomly generated, and the OTA service is different each time, thereby avoiding key leakage and replay attacks, ensuring the security of in-vehicle network OTA communication.