Pay TV method and device which comprise master and slave decoder

Details Pay TV method and device which comprise master and slave decoder Pay TV method and device which comprise master and slave decoder

1996-02-08

1998-05-05

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

348 55, 380 20, 380 21, H04N 7167, H04L 900

Patent

active

057487324

ABSTRACT:
A master decoder for use with a master smart card and at least one slave decoder for use with a slave smart card are arranged in a pay tv system, wherein the master decoder receives slave entitlement messages from a central management device and writes the slave entitlement messages to the slave smart cards when the slave smart cards are inserted in the master decoder. This ensures that the slave decoders are used within close proximity of the master decoders, such as in the same dwelling.

REFERENCES:
patent: 4484027 (1984-11-01), Lee et al.
patent: 4633309 (1986-12-01), Li et al.
patent: 5461675 (1995-10-01), Diehl et al.
patent: 5509073 (1996-04-01), Monnin
patent: 5563948 (1996-10-01), Diehl et al.
"Specification of the D2-MAC Packet System", Edition 1985, pp. 142, 143.

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