Copy protection method for digital data stored on a medium
US8074285B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Aug 25, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of protection against the copying of digital data stored on an information carrier envisages, on the basis of a first identification of an encryption of the digital data and of a second identification of a watermarking of digital data, the determination of a first mark if it has been possible to identify the encryption and the watermarking. A third identification of a type of the information carrier is followed by the determination of a second mark if it has been possible to determine the first mark and if has been possible to identify a determined type of information carrier. A fourth identification of cryptographic signature data accompanying the digital data is followed by the determination of a third mark if it has been possible to determine the second mark and if it has been possible to identify a cryptographic signature datum. A permission for digital copying of the digital data is delivered if it has been possible to determine the third mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.