Super encrypted storage and retrieval of media programs with smartcard generated keys
US7804958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2008 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Aug 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. In summary, the present invention describes a system and method for storing and retrieving program material for subsequent replay. The method comprises the steps of accepting encrypted access control information and the program material encrypted according to a first encryption key, the access control information including a first encryption key and control data; decrypting the received access control information to produce the first encryption key; decrypting the program material using the first encryption key; re-encrypting the program material using according to a second encryption key; encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and providing the re-encrypted program material and a fourth encryption key for storage. The apparatus comprises a conditional access module, for accepting encrypted access control information and the program material encrypted according to a first encryption key, the encrypted access control information including the first encryption key and temporally-variant control data, the control a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.