Method for preventing laundering and repackaging of multimedia content in content distribution systems
US9252957B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2009 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Sep 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for distributing content in a content distribution system is disclosed which comprises the steps of: encrypting at a Content Packager a content using a content encryption key to generate an encrypted content; sending the content encryption key to a Licensing Authority; receiving from the Licensing Authority a distribution key containing an encryption of the content decryption key (Kc) for a given set of authorized devices; creating a secure link between the content encryption key (Kc) and the content protected by this content encryption key using a signature of the content; and distributing the encrypted content together with the signature of the content. A method for receiving content distributed according to the above-mentioned method in a device able to play back the content is also disclosed where the content signature is checked before any play back of the content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.