Audi Ag

Carsten Schmal

Ingo Ledendecker

Stefan Geiger

It should not be possible for control units for motor vehicles to be exchanged between individual motor vehicles by unauthorized persons. For a motor vehicle it should, therefore, be rendered possible for individual functionalities of a control unit to be unblocked only for a specific motor vehicle. For this purpose, a first cryptographic key and a second cryptographic key are stored in a control unit. A cryptographic device is designed to encrypt a first message initially by one of the cryptographic keys, subsequently to encrypt a result of the encryption by the other cryptographic key and, finally, to provide a result of the second encryption as third cryptographic key for an encryption and/or decryption of a further message. A method configures a control unit in a motor vehicle.

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Munich, Germany

Carsten Schmal