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

Claim 9:
10. 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;
provision the one or more security keys to the first ECU and the set of ECUs;
select, from the set of ECUs, a subset of ECUs that has a same security level; and
determine a group key for secure communication between the first ECU and any ECU in the subset of ECUs and between any two ECUs in the subset of ECUs;
wherein the group key is further used for secure communication between the first ECU and a second ECU in the set of ECUs that has a higher security level.