Access control for digital video stream data
US7478238B2 · kind B2 · utility
3Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Dec 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data encryption apparatus operable to apply encryption to input data having at least a format identifying portion and a payload portion comprises means for discriminating between the format identifying portion of the input data and the payload portion of the input data; and means for selectively applying encryption to the input data in dependence upon an output of the discriminating means so as to encrypt at least a part of the payload portion of the input data but not to encrypt the format identifying portion. A corresponding decryption apparatus is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.