Obtaining a signed rights label (SRL) for digital content and obtaining a digital license corresponding to the content based on the SRL in a digital rights management system
US7353402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2002 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Jul 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Content is encrypted according to a content key (CK) ((CK(content))), (CK) is protected according to a license server public key (PU-DRM), and rights data associated with the content is protected according to (PU-DRM). The protected items are submitted as a rights label to the license server for signing. The license server validates the rights label and, if valid, digitally signs based on the protected rights data to result in a signed rights label (SRL), and returns same. The SRL is concatenated with (CK(content)) and both are distributed to a user. To render the content, the user submits the SRL to the license server to request a license. The license server verifies the SRL signature and reviews the SRL protected rights data to determine whether the user is entitled to the license, and if so issues the license, including (CK) in a protected form accessible to the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.