Patent ID: 11888833
Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 13:
14. A method comprising:
verifying, by a key distribution center for a vehicle, that a digital certificate associated with a first electronic control unit (ECU) on the vehicle is a valid certificate, the digital certificate indicating a first security level of the first ECU, wherein the first security level is one of a plurality of security levels for electronic control units (ECUs) having different security levels corresponding to different subsystems in the vehicle, wherein a highest security level is used for ECUs for subsystems including at least one of powertrain subsystem, chassis subsystem, body/comfort subsystem, engine subsystem, transmission subsystem, brakes subsystem, and door locks subsystem;
generating, by the key distribution center and based on the first security level of the first ECU, one or more security keys for secure communication between the first ECU and a set of ECUs on the vehicle, wherein the one or more security keys are a type of security key usable at the first security level, wherein the types of security keys include at least one of symmetric and asymmetric;
provisioning, by the key distribution center, the one or more security keys to the first ECU and the set of ECUs;
sending, by the key distribution center to the first ECU, an authentication request message that is encrypted or authenticated with a first security key in the one or more security keys;
determining by the key distribution center that:
an authentication response message is not sent by the first ECU to the key distribution center; or
the authentication response message sent by the first ECU to the key distribution center is not encrypted or authenticated with the first security key; and

reporting, by the key distribution center to a cloud server, that the first ECU has been changed.