System and method for limiting access to data
US8254576B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2005 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Sep 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controlling device provides conditional access to secured content renderable by an appliance. The controlling device transmits a data frame to the appliance and encrypts at least a part of the data frame that includes data to be used by the appliance to provide access to the secured content. At the appliance a decryption key complimentary to the encryption key is used to decrypt the received the data frame. The appliance allows the secured content to be rendered only after the appliance determines that the data in the received, decrypted data frame includes the data the appliance requires to provide access to the secured content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.