Patent ID: 11909726
Assignee: ROBERT BOSCH GMBH
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A non-transitory machine-readable storage medium on which is stored a computer program for applying control to a vehicle, the computer program, when executed by a computer, causing the computer to perform or control the following steps:
receiving, using a second control unit of a second vehicle to which control is to be applied, a signal encompassing a message encrypted using a valid symmetrical key of a first control unit of a first vehicle;
ascertaining, using the second control unit, a decryptability of the encrypted message using: (i) a valid symmetrical key of the second control unit or (ii) a symmetrical reserve key of the second control unit ascertained using the second control unit, wherein the ascertaining includes:
determining whether the encrypted message is decryptable using the valid symmetrical key, and
in case that the encrypted message is not decryptable using the valid symmetrical key, determining that the encrypted message is decryptable by the symmetrical reserve key;

decrypting the encrypted message, depending on the ascertained decryptability, using the second control unit, using (i) the valid symmetrical key of the second control unit or (ii) the symmetrical reserve key of the second control unit; and
applying control, based on the decrypted message, to the second vehicle to which control is to be applied.