Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2006-02-13
2009-11-24
Abrishamkar, Kaveh (Department: 2431)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C713S150000, C713S193000, C713S194000, C380S034000
Reexamination Certificate
active
07624283
ABSTRACT:
A computer implemented method for recovering a partition context in the event of a system or hardware device failure. Upon receiving a command from a partition to modify context data in a trusted platform module (TPM) hardware device, a trusted platform module input/output host partition (TMPIOP) provides an encrypted copy of the context data and the command to the TPM hardware device, which processes the command and updates the context data. If the TPM hardware device successfully processes the command, the TMPIOP receives the updated context data from the TPM hardware device and stores the updated context data received in encrypted form in a context data cache or a non-volatile storage off-board the TPM hardware device. If the TPM hardware device fails to successfully process the command, the TMPIOP uses a last valid copy of the context data to retry processing of the command on a different TPM hardware device.
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Bade Steven A.
Dewkett Thomas J.
Kelley Nia L.
Sutter Siegfried
Weber Helmut H.
Abrishamkar Kaveh
International Business Machines - Corporation
Salys Casimer K.
Yee & Associates P.C.
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