Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2006-09-27
2010-10-19
Moise, Emmanuel L (Department: 2437)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
Reexamination Certificate
active
07818567
ABSTRACT:
A method for protecting Security Accounts Manager (SAM) files within a Windows® operating system is disclosed. A SAM file encryption key is generated by encrypting a SAM file via a syskey utility provided within the Windows® operating system. The SAM file encryption key is then stored in a virtual floppy disk by selecting an option to store SAM file encryption key to a floppy disk under the syskey utility. A blob is generated by performing a Trusted Platform Module (TPM) Seal command against the SAM file encryption key along with a value stored in a Performance Control Register and a TPM Storage Root Key. The blob is stored in a non-volatile storage area of a computer.
REFERENCES:
patent: 7380136 (2008-05-01), Zimmer et al.
patent: 2003/0188179 (2003-10-01), Challener et al.
Roberta Bragg, Protecting the SAM with Syskey, infomIT.
Challener David C.
Childs Philip L.
Dion, II Norman A.
Hunt James
Peterson Nathan J.
Abyaneh Ali S
Dillon & Yudell LLP
Lenovo ( Singapore) Pte. Ltd.
Moise Emmanuel L
Ng Antony P.
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