EP0427601A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for authenticating a microprocessor-card, and system for implementing it
Assignee: Technicolor R&D France SNC
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Filing: 1990-11-02
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Granted: —
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Expires: 2010-11-02
Abstract
Abstract The device of the invention for a pay television system comprises a transmitter (1) and several receivers (2) using "chip cards". In addition to the unscrambling control signals, the transmitter sends encrypted authentication messages to which only the receivers in which valid cards are used can respond correctly. <IMAGE>
Inventors
- 👤 Eric Diehl
- 👤 Joel Hamon
- 👤 Michel Leduc
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/346; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G06Q20/40975; G07F7/1016; H; H04; H04N; H04N21/00; H04N21/40; H04N21/43; H04N21/436; H04N21/4367; H04N21/442; H04N21/44236; H04N7/00; H04N7/16; H04N7/173; H04N7/17345; H04N7/17363
Claims Analysis
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