Conditional access system and smartcard allowing such access
US6035038A · kind A · utility
101Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1997 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Jun 27, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The conditional access system of the present invention allows a service provider to supply services, which may be scrambled by a control word, only to those users who have acquired entitlements to these services. The control word is supplied in Entitlement Control Messages (ECM) after having been encrypted using a key. The entitlements of each user are forwarded in Entitlement Management Messages which contain the key. The conditional access system verifies and validates the ECM and EMM prior to processing the control word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.