Global conditional access system for broadcast services

Details Global conditional access system for broadcast services Global conditional access system for broadcast services

1998-06-05

2009-12-22

Vu, Kimyen (Department: 2435)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C726S009000, C726S010000, C380S228000

Reexamination Certificate

active

07636846

ABSTRACT:
A method for managing access to a scrambled event, selected from an electronic program guide, of a service provider (including broadcast television networks, cable television networks, digital satellite systems, and internet service providers). Access to the event is only achieved if the descrambling key is obtained from a digitally signed message associated with the event in the electronic program guide. Authentication of the electronic program guide provider involves decrypting the digital signature using a public key of the guide provider.

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