Domain digital rights management system, license sharing method for domain digital rights management system, and license server
US8165304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2008 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Dec 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a domain DRM system, a license sharing method for the domain DRM system, and a license server. The domain DRM system includes at least one domain including at least one user module adapted for encryption or decryption using a provided encryption key and a domain manager adapted for decryption using a provided encryption key, and a license server for creating encryption keys corresponding to the domain manager and the one user module, respectively, and providing them with the created contents, respectively, so that, when at least one user module requests contents, a contents encryption key used to encrypt the contents is encrypted by using an encryption key of the user module and an encryption key of the domain manager according to a commutative encryption scheme, and one of the domain manager and the user module is provided with a shared license obtained as a result of encryption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.