Cryptography – Key management – Having particular key generator
Patent
1993-09-27
1996-10-08
Buczinski, Stephen C.
Cryptography
Key management
Having particular key generator
380 20, H04N 7167
Patent
active
055639488
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.
REFERENCES:
patent: 4599647 (1986-07-01), George et al.
patent: 4751732 (1988-06-01), Kamitake
patent: 4935962 (1990-06-01), Austin
patent: 4968873 (1990-11-01), Dethloff et al.
patent: 4985920 (1991-01-01), Seki
Diehl Eric
Hamon Joel
Leduc Michel
Buczinski Stephen C.
Laboratoire Europeen De Recherches Electroniques Avancees, Socie
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