Content using system
US7194091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A content using system is composed of a content importing apparatus and at least one content using apparatus. The content importing apparatus includes a content ID generating unit that generates a content ID, and a content key information encryption converting unit that converts the encryption of content key information by using an encryption key (“network key”) that is shared in advance on the network. The content using apparatus includes a content key information decrypting unit that decrypts the content key information, whose encryption has been converted, by using the network key, a moved content list storing unit for storing a moved content list (MCL) in which the content IDs of contents that have been written onto a storage medium are written, and a moved content list managing unit that judges whether the writing of a content is permitted or prohibited based on the MCL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.