Secure clock with grace periods
US8438645B2 · kind B2 · utility
5Cited by
512References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Oct 15, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2137
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system of controlling playback of digital media. A system of controlling playback of digital media comprising a CE device having a secure clock and a license having a specified grace period disposed upon the CE device in which a digital media file governed by the license may be played for the grace period upon failure of the secure clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.