Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2003-04-18
2009-10-13
Barron, Jr., Gilberto (Department: 2432)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S190000
Reexamination Certificate
active
07603550
ABSTRACT:
A computer system includes a processor which may initialize a secure execution mode by executing a security initialization instruction. Further, the processor may operate in the secure execution mode by executing a secure operating system code segment. The computer system also includes an input/output (I/O) interface coupled to the processor via an I/O link. The I/O interface may receive transactions performed as a result of the execution of the security initialization instruction. The transactions include at least a portion of the secure operating system code segment. The I/O interface may also determine whether the processor is a source of the transactions. The computer system further includes a security services processor coupled to the I/O interface via a peripheral bus. The I/O interface may convey the transactions to the security services processor dependent upon determining that the processor is the source of the transactions.
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Christie David S.
Gulick Dale E.
Hughes William A.
McGrath Kevin J.
Strongin Geoffrey S.
Advanced Micro Devices , Inc.
Almeida Devin
Barron Jr. Gilberto
Curran Stephen J.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
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