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:
Oct. 28, 2025
Filed:
Sep. 28, 2023
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Cheng-Yi Hung, Valencia, PA (US);
Vimalraj Vasudevan Thekkoot, San Jose, CA (US);
Rochak Chadha, Pittsburgh, PA (US);
Gregory J. Zavertnik, Mountain House, CA (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
Abstract
Techniques are described herein in which boot firmware validated by secure flash memory validates read-only portions of firmware stored by the firmware or a downloaded image of the read-only portions. The secure flash memory validates a portion of the firmware, which includes the boot firmware and a reference hash of the read-only portions, by comparing a calculated hash of the portion and the reference hash of the portion. The boot firmware initiates a boot of the firmware and validates the read-only portions (or the downloaded image of the read-only portions) by comparing a calculated hash of the read-only portions (or a calculated hash of the downloaded image) and the reference hash of the read-only portions. The boot firmware completes the boot of the firmware based at least on the read-only portions (or the downloaded image) being validated.