Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2011-03-29
2011-03-29
Song, Hosuk (Department: 2435)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S164000, C713S193000, C726S026000, C726S027000
Reexamination Certificate
active
07917753
ABSTRACT:
Systems and methods for transferring control between programs of different security levels are described herein. Some embodiments include a processor capable of operating at one or more security levels including a first and a second security level, a memory system coupled to the processor (the memory system stores a first program that executes on the processor at the first security level, and a second program that executes on the processor at the second security level), and a register configured to store an entry point address to the first program (wherein an instruction that executes on the processor at the second security level is blocked from writing values to the register). A transfer of control from the second program to the first program is executed if the register provides the entry point address. The transfer of control is blocked if the entry point address is not provided by the register.
REFERENCES:
patent: 5604885 (1997-02-01), Denio
patent: 7401358 (2008-07-01), Christie et al.
Asal Michael D.
Lell Anthony J.
Swoboda Gary L.
Brady W. James
Marshall, Jr. Robert D.
Song Hosuk
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
LandOfFree
Transferring control between programs of different security... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transferring control between programs of different security..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transferring control between programs of different security... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2698376