The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2020
Filed:
Sep. 01, 2017
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Badriddine Khessib, Redmond, WA (US);
Bryan David Kelly, Carnation, WA (US);
Mallik Bulusu, Bellevue, WA (US);
MICROSOFT TECHNOLOGY LICENSING, LLC, Redmond, WA (US);
Abstract
A Root of Trust hardware hierarchy provides firmware security for motherboard and peripheral devices. Power is received at a computer system and, in response to the receipt of power, of a standby power rail of a motherboard of the computer system is energized, and a first microcontroller mounted on the motherboard authenticates first firmware associated with a baseboard management controller mounted on the motherboard and coupled to the first microcontroller. If the authentication of the first firmware is successful, the baseboard management controller is powered on, a central processing unit coupled to the first microcontroller is held in reset, and a standby power rail of a peripheral component card coupled to the motherboard is energized. Second firmware associated with the central processing unit is authenticated using the first microcontroller and a second microcontroller mounted on the peripheral component card authenticates third firmware associated with a system on chip mounted on the peripheral component card and coupled to the second microcontroller.