Method and apparatus for key distribution with implicit offline authorization
US9172683B2 · kind B2 · utility
9Cited by
2References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2011 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Mar 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a Digital Rights Management (DRM) system, cryptographic keys for decrypting distributed assets (such as audio or video media) are distributed using an offline (e.g., non-Internet) method for distribution of the key generation process, with an implicit authorization to use the distributed key generation process. This is used to update an asset key for use by a client such as a media player when a key formula for generating the key for decrypting an asset has been compromised, such as by hackers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.