Patent ID: 11895244
Assignee: DELL PRODUCTS L.P.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An information handling system, comprising:
a basic input/output system (BIOS) configured to:
generate, during a power-on self-test, a secret key that includes a symmetric key and a hash-based message authentication code key, wherein the secret key is stored in a system management interrupt handler;
transmit, during the power-on self-test, the secret key to a service processor via a high-speed communication interface; and
subsequent to the power-on self-test, transmit a system management interrupt message that includes an encrypted message and a first hash value of the encrypted message via the high-speed communication interface, wherein the encrypted message is encrypted using the symmetric key and the first hash value of the encrypted message is calculated using the hash-based message authentication code key of the secret key; and

the service processor configured to:
receive the system management interrupt message from the BIOS;
calculate a second hash value of encrypted message based on the hash-based message authentication code key;
verify the encrypted message by comparing the first hash value and the second hash value;
subsequent to a successful verification that the first hash value is equal to the second hash value, decrypt the encrypted message using the symmetric key; and
transmit a response to the BIOS via the high-speed communication interface.