Process for authentication of smart cards, and device for use of the process
US5563948A · kind A · utility
89Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1993 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Sep 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44236
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The device of the invention for a pay-television system comprises an emitter and several receivers using "smart cards". In addition to the unscrambling control signals, the emitter sends encrypted authentication messages to which a correct response can be given only by the receivers where valid cards are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.