05742680 is referenced by 163 patents and cites 19 patents.

A system and corresponding method are provided for selecting one of a plurality of simultaneously received encrypted direct broadcast satellite (DBS) signals for decryption and viewing. A converter box or decrypting device is provided with a plurality of different decrypting smart cards, all of which are simultaneously inserted in the converter box. The user or viewer scans the received signals and selects one for viewing. The different decrypting algorithms of the different smart cards respectively correspond to the different encryptions of the received DBS signals so that the selected encrypted signal is decrypted by the appropriate and corresponding decrypting smart card and subsequently decompressed and viewed.

Title
Set top box for receiving and decryption and descrambling a plurality of satellite television signals
Application Number
8/556511
Publication Number
5742680
Application Date
November 13, 1995
Publication Date
April 21, 1998
Inventor
Jerrell Wilson
Los Gatos
CA, US
Agent
Myers Liniak & Berenato
Assignee
E Star
CA, US
IPC
H04L 9/32
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