Broadcast data access controller communication system

Details Broadcast data access controller communication system Broadcast data access controller communication system

1997-11-05

1999-12-07

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 21, 380 49, H04N 504, H04L 908

Patent

active

059996234

ABSTRACT:
Disclosed is a method and apparatus for enabling an authorized receiver station to decrypt encrypted information broadcast by a transmitter station, and for decrypting the information within the authorized receiver station. The method includes steps of storing a predetermined Subscription Key value in the authorized receiver station and, using the predetermined Subscription Key value, generating a Decryption Key value. In a next step the transmitter station broadcasts a signal which includes the encrypted information. After the broadcasted signal is received at the authorized receiver station, the authorized receiver station performs a predefined algorithm. The predefined algorithm uses the generated Decryption Key value to decrypt the encrypted information from the received signal.

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