Methods and systems of protecting digital content
US7065216B1 · kind B1 · utility
97Cited by
33References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Sep 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/606
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems are described that enable protection of digital content, such as movies and the like, by making pirated copies traceable back to a unique decryption key that was utilized to decrypt the originally encrypted content. Various embodiments can intrinsically link any unauthorized copies back to a unique cryptographic key or key collection that was used when the genuine copy was reproduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.