US 11,698,972 B2
Method to securely transfer root of trust responsibilities on a common shared motherboard
Eugene David Cho, Austin, TX (US); and Marshal F. Savage, Austin, TX (US)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Jul. 22, 2021, as Appl. No. 17/383,041.
Prior Publication US 2023/0025053 A1, Jan. 26, 2023
Int. Cl. G06F 21/57 (2013.01); H04L 9/08 (2006.01); G06F 21/72 (2013.01); G06F 9/4401 (2018.01)
CPC G06F 21/575 (2013.01) [G06F 9/4401 (2013.01); G06F 21/72 (2013.01); H04L 9/0816 (2013.01); G06F 2221/034 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An information handling system, comprising:
a chassis comprising chassis storage; and
a motherboard located within the chassis comprising a management controller, wherein the management controller comprises controller storage,
wherein the controller storage comprises a unique encryption key and a root of trust (RoT) identifier,
wherein the chassis storage comprises an encrypted value generated by encrypting the RoT identifier with the unique encryption key,
wherein the management controller is programmed to:
after being powered on and prior to initiating a boot loader:
requesting the encrypted value from the chassis storage;
receiving the encrypted value from the chassis storage;
decrypting the encrypted value for the chassis storage using the unique encryption key to obtain a decrypted value; and
initiating the boot loader when the decrypted value equals the RoT identifier.