Subscription broadcast security system

Details Subscription broadcast security system Subscription broadcast security system

2003-11-07

2010-02-09

Vu, Kimyen (Department: 2435)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Having particular address related cryptography

C380S210000, C380S238000, C726S031000

Reexamination Certificate

active

07660982

ABSTRACT:
A subscription broadcast security system for preventing theft of an encrypted program datastream utilizes an encryption protocol with steganographic supplementation. A decoder includes a decryption chip containing numerous decryption codes and an ID chip having a continually changing unique identification code for authenticating subscriber access. The ID chip and the decryption chip each receive decoding instructions through a combination of hidden data in the audio signal and from service provider communication directly with the ID chip.

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