Interoperable keychest for use by service providers
US8452016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2009 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Apr 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
There is provided a system and method for distributors to use an interoperable key chest. There is provided a method for use by a distributor to obtain content access authorizations from a key chest or central key repository (CKR), the method comprising receiving a user request from a user device for access to an encrypted content identified by a content identification, transmitting a key request to the CKR including the content identification, receiving an encrypted first key from the CKR, decrypting the encrypted first key using a second key to retrieve the first key, and providing a DRM license for the encrypted content to the user device using the first key for use by the user device to decrypt the encrypted content using the first key. By generating such DRM licenses, distributors can unlock protected content even sourced from distributors using different DRM schemas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.