Electrical computers and digital processing systems: support – Digital data processing system initialization or configuration – Loading initialization program
Reexamination Certificate
2004-02-25
2008-01-08
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Digital data processing system initialization or configuration
Loading initialization program
C726S027000
Reexamination Certificate
active
07318150
ABSTRACT:
A system and method to support platform firmware as a trusted process. Measurement of a trusted portion of original firmware are measured by a core root of trust measurement (CRTM). The measurement is stored in a secure manner during pre-boot. During operating system (OS)-runtime, requests are made to access an unqualified current version of firmware corresponding to a secure execution mode. A portion of the current firmware analogous to the trusted portion is measured. The measurements of the trusted original portion and unqualified current portion are compared to verify they match. If they match, it indicates that the current portion and the trusted portion are one in the same. Thus, the current portion of firmware is trustworthy. Accordingly, the firmware may be executed as a trusted process. Embodiments employ locality to enforce the trusted process. The use of locality prevents unqualified users (i.e., software) from accessing data stored by trusted firmware.
REFERENCES:
patent: 6988250 (2006-01-01), Proudler et al.
patent: 7065654 (2006-06-01), Gulick et al.
patent: 7069439 (2006-06-01), Chen et al.
patent: 2004/0073806 (2004-04-01), Zimmer
patent: 2005/0138393 (2005-06-01), Challener et al.
Li Jing
Wiseman Willard M.
Zimmer Vincent J.
Blakely , Sokoloff, Taylor & Zafman LLP
Johnson Carlton V
Moazzami Nasser
LandOfFree
System and method to support platform firmware as a trusted... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method to support platform firmware as a trusted..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method to support platform firmware as a trusted... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3964287