Gm Global Technolgoy Operations, Inc.

Christopher J Kloote

Kenneth William Junk

Brian Farrell

Manohar Reddy Nanjundappa

An apparatus includes a compute device having a microcontroller unit circuit, multiple processing circuits, and a backplane bus. Initial unsecured communications through the backplane bus are restricted. The microcontroller unit circuit is operational to authenticate the processing circuits with a plurality of processor attestations over a local area network bus based on a secure onboard communication protocol of an automotive open system architecture, a symmetric key, and a message authentication code. The processing circuits are operational to reply to the processor attestations over the local area network bus, and verify the microcontroller unit circuit based on the secure onboard communication protocol, the symmetric key, and the message authentication code received from the microcontroller unit circuit. Secure communications through the backplane bus among the processing circuits is enabled based on the authentications of the processing circuits and the verifications of the microcontroller unit circuit.

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Livonia, MI, United States of America

Christopher J Kloote