Multiple watermarks for digital rights management (DRM) and content tracking
US7802306B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2006 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Mar 2, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3239
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for providing Digital Rights Management (DRM) using multiple watermarks are disclosed. In one embodiment, upon purchase of a digital asset, a copy of the digital asset that is watermarked with a content specific watermark and a user, or purchaser, specific watermark and a digital certificate including content specific watermark information and user specific watermark information corresponding to the watermarks in the copy of the digital asset are generated. The copy of the digital asset and the digital certificate are provided to the user. Thereafter, access to the copy of the digital asset is controlled based on a comparison of the watermarks in the copy of the digital asset and the watermark information in the digital certificate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.