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:
May. 26, 2026
Filed:
Jan. 11, 2024
Schneider Electric Usa, Inc., Andover, MA (US);
Michael Pyle, Hermitage, TN (US);
Schneider Electric USA, Inc., Boston, MA (US);
Abstract
Embodiments described herein provide techniques for securely validating firmware on a device using certificates and providing a mechanism for deprecating select certificates when a traditional certificate authority is unavailable or otherwise cannot be used. When a first firmware package is installed on the device, a first certificate in a first secure memory location is associated with an active status. Responsive to validation and installation of a second firmware package on the device, a second certificate in a second secure memory location on the device is associated with an active status. During a boot-up operation on the device, embodiments determine to use the second certificate to validate the second firmware package by starting at a predefined secure memory location and scanning backwards until a status of active is identified. The second firmware package on the device is then validated using the second certificate.