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:
Jun. 17, 2003
Filed:
Dec. 23, 1999
Bryon S. Nevis, Aloha, OR (US);
Mark Albrecht, Hillsboro, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Briefly, in accordance with one embodiment of the invention, a method of updating BIOS using an externally provided module may include the following. In this context, the term externally provided means that the module resides in a device other than that used to hold the firmware code, such as a magnetic storage device, typically with a lower cost per bit of information. In this embodiment, the BIOS, while in control of or being executed by a processor, applies a one-way hash process to a portion of the externally provided module. The computed hash of the module portion is compared with the pre-computed hash value included with the BIOS code. The external module is then invoked as a subprogram if and only if the hash values compare as equal. The module, while executing, may then validate the remainder of the update using more sophisticated cryptographic techniques and/or perform the update directly.