Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2007-01-19
2010-11-23
Simitoski, Michael J (Department: 2439)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S002000, C713S176000, C713S194000, C726S026000
Reexamination Certificate
active
07840801
ABSTRACT:
The presented method allows a virtual TRUSTED PLATFORM MODULE (TPM) instance to map the Platform Configuration Registers (PCR) register state of a parent virtual TPM instance into its own register space and export the state of those registers to applications inside the virtual machine associated with the virtual TPM instance. Through the mapping of PCR registers, the procedure of attesting to the overall state of a virtual machine can be accelerated, since the state of all measurements relevant to the trustworthiness of a virtual machine are all visible in the combined view of mapped and non-mapped PCR registers. Registers that are mapped into the register space of a virtual TPM instance reflect the state of trustworthiness of those virtual machines that were involved in the creation of the virtual machine that is being challenged.
REFERENCES:
patent: 6990579 (2006-01-01), Herbert
patent: 2005/0132031 (2005-06-01), Sailer et al.
patent: 2007/0056033 (2007-03-01), Grawrock
patent: 2008/0114989 (2008-05-01), Anbalagan et al.
Trusted Computing Group, TPM Main, Part 1 Design Principles, Specification Version 1.2, 150 pages, Published Oct. 2, 2003.
Trusted Computing Group, TPM Main, Part 2 TPM Structures, Specification Version 1.2, 164 pages, Published Oct. 2, 2003.
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“vTPM: Virtualizing the Trusted Platform Module”, Stefan Berger et al., 15th Usenix Security Symposium, Aug. 2-4, 2006, Vancouver, Canada, 16 pages.
“Design and Implementation of a TCG-based Integrity Measurement Architecture”, Reiner Sailer et al., 13 Usenix Security Symposium, Aug. 2004, San Diego, California, 16 pages.
U.S. Appl. No. 11/242,673, filed Oct. 3, 2005, entitled “Dynamic Creation and Hierarchial Organization of Trusted Platform Modules”.
Berger Stefan
Goldman Kenneth A.
Perez Ronald
Sailer Reiner
Cantor & Colburn LLP
International Business Machines - Corporation
Simitoski Michael J
Young Preston
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