A system for controlling access to broadcast transmissions

Details A system for controlling access to broadcast transmissions A system for controlling access to broadcast transmissions

H - Electricity

04

K

350/20, 354/237,

H04K 1/00 (2006.01) G07F 7/10 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2025585

A receiver system for controlling access to a broadcast transmission provided by a transmitter having a transmission scrambler for at least partially scrambling a broadcast, the system including a multiplicity of subscriber receivers each having means for receiving an at least partially scrambled broadcast and a receiving descrambler for descrambling the at least partially scrambled broadcast and a plurality of portable executing means operatively associable with any one receiving descrambler, characterized in that in each receiver, the descrambler is operative when associated with any one of the portable executing means, to generate a descrambling code, for use by the associated receiving descrambler to enable the receiving descrambler to descramble the broadcast.

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