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:
Feb. 21, 2012
Filed:
Jul. 30, 2008
Carl Melvin Ellison, Seattle, WA (US);
John M. Parchem, Seattle, WA (US);
Carl Melvin Ellison, Seattle, WA (US);
John M. Parchem, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Computer-executable instructions can implement a software-based Trusted Platform Module (TPM) that can have more computational power than the hardware TPM. The software TPM can be protected from modification, or other unauthorized access, via a memory partitioning scheme that enables other computer-executable instructions to access the software TPM in a predefined manner, but yet prohibits other access. A tri-partied partitioning scheme can be used wherein the computer executable instructions of the software TPM reside in a first region, a jump table to appropriate ones of those instructions resides in a second region, and everything else resides in the third region. The storage key of the software TPM can be sealed by the hardware TPM to be released only if the software TPM, and the computing device, are in a known good state, as determined by the Platform Configuration Registers of the hardware TPM, thereby further protecting the software TPM from tampering.