Security processor and methods for registering access entitlements and cryptographic keys
US8949623B2 · kind B2 · utility
2Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2006 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jan 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This security method for scrambled multimedia signal decoder comprises at least one rewritable lock (62, 64), the value of which can be toggled at least between a first and a second value in response to an EMM message, and in which a registration module is able, in response to one and the same EMM registration message for writing new access entitlements or new cryptographic keys, to authorize and, alternatively, to prohibit this registration depending on the value of the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.