Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2004-06-24
2010-02-23
Zand, Kambiz (Department: 2434)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S164000, C713S165000, C713S167000
Reexamination Certificate
active
07669050
ABSTRACT:
A method to enable a user mode process to operate in a privileged execution mode is disclosed. Applicants' method provides an operating system comprising a privileged execution mode and a non-privileged execution mode, and a plurality of user mode strings operating in the non-privileged execution mode. The computing device receives a request from a first user mode string to operate in the privileged execution mode to perform one or more designated tasks. Applicants' method authorizes the first user mode string to operate in the privileged execution mode, and the first user mode string performs those one or more designated tasks using the privileged execution mode. Applicants' method continues to permit the first user mode string to operate in the privileged execution mode after completion of the one or more designated tasks.
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Blinick Stephen L.
Hsu Yu-Cheng
Hailu Teshome
International Business Machines - Corporation
Quarles & Brady LLP
Regelman Dale F.
Zand Kambiz
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