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

Claim 10:
11. A security platform for a vehicle, the security platform comprising:
a key distribution center for the vehicle, the key distribution center being mounted in a processing device in the vehicle and configured to:
provide 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;
verify 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;
generate, 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; and

provision the one or more security keys to the first ECU and the set of ECUs;
wherein the key distribution center is further configured to, at a time when the vehicle is powered up:
send, 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;
determine 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

report, to a cloud server, that the first ECU has been changed.