How the directv descrambler is designed to decode satellite TV programming packages

The directv descrambler is designed to decode and unscramble intentionally scrambled satellite signals so the subscriber can receive their satellite TV programming. Directv scramble the satellite signals so that unauthorized persons cannot access the programming.

The directv descrambler unscrambles the video signals using the following method:

The authorization center creates the master data stream. This data stream contains a digitally derived key based upon the serial number of EACH authorized decoder and a "Tier bit" for EACH channel it is authorized to receive (determined by which programming package has been paid for)

"SEED KEYS" in the receiver itself combine with the other half of the key (transmitted by the authorization center) and create the master key used to decode the audio and turn on the video descrambling circuit

Once the directv descrambler unscrambles the signal an access card delivers the programming package the subscriber has paid for. The card has a unique identification number, which is how Directv can add or remove programming from each card.

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