Method for preventing system wake up from a sleep state if a...

Details Method for preventing system wake up from a sleep state if a... Method for preventing system wake up from a sleep state if a...

2004-10-16

2008-08-12

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

Reexamination Certificate

active

07412596

ABSTRACT:
A method and system for enabling security attestation for a computing device during a return from an S4 sleep state. When the computing device enters into the S4 state following a successful boot up, the attestation log is appended to the TPM tick count and the log is signed (with a security signature). When the device is awaken from S4 state, the BIOS obtains and verifies the log created during the previous boot. The CRTM maintains a set of virtual PCRs and references these virtual PCRs against the log. If the values do not match, the return from S4 state fails and the device is rebooted.

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