Secure data processing apparatus
US7590860B2 · kind B2 · utility
21Cited by
25References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2002 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for processing data involving receiving a scrambled program and encrypted data including at least one control word used to descramble the scrambled program at a receiver/decoder operatively connected to a mass storage device. If a user does not initially have the necessary access rights, the scrambled program and the encrypted data are stored by the receiver/decoder. When the user obtains the access rights, the encrypted data is read and the at least one control word is extracted. The encrypted data is then replaced by the control word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.