Super-distribution of protected digital content
US7590866B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2005 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Super distribution of protected digital content is disclosed. According to one embodiment of the invention previously purchased encrypted digital content is received from a purchaser of the digital content. The purchaser of the previously purchased encrypted digital content is different from the recipient of the encrypted digital content. A secure transmission is established with an authorization authority for decrypting the content. A first decryption key for decrypting at least part of the previously purchased encrypted content as permitted by the authorization authority is received from the authorization authority. The at least part of the previously purchased encrypted content is decrypted as permitted by the authorization authority.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.