Method for preventing system wake up from a sleep state if a boot log returned during the system wake up cannot be authenticated
US7412596B2 · kind B2 · utility
9Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2004 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Nov 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/575
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.