Content distributing system with dynamic encryption keys
US8261360B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2005 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | May 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A content distributing system for distributing content disclosed herein is an encrypting apparatus for encrypting each of objects constituting content using a different encryption key, a content offering apparatus for offering the encrypted content to a content reproducing apparatus; a license information offering apparatus for offering license information including information necessary for decrypting the encrypted content, and a content reproducing apparatus for acquiring the encrypted content from the content offering apparatus in order to decrypt and reproduce the acquired content using the license information acquired from the license offering apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.