Method and system to provide secure key selection using a secure device in a watercrypting environment
US7415440B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | May 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8358
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system are disclosed to provide secure key selection using a secure device in a watercrypting environment. A license containing a product key of a watercrypted content and a client identifier is transmitted to a secure device for storage. An entitlement control message containing multiple content keys associated with the watercrypted content is further transmitted to the secure device, together with a request to provide a session content key from the multiple content keys, the session content key to be used to decrypt the watercrypted content. Finally, the session content key is received from the secure device in response to the request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.