Secure clock
US7540008B2 · kind B2 · utility
1Cited by
30References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2003 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Dec 4, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/725
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus comprising a secure time element comprising a timing device that outputs to a plurality of delay devices, wherein the delay devices have characteristic delay times which are alterable as a result of a tampering attempt to tamper therewith, and wherein a characteristic delay time of one of the delay devices changes differently from another one of the delay devices as a result of the tampering attempt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.