Global conditional access system for broadcast services
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 22, 2009
Grant Date -
N/A
app pub date -
Jun 5, 1998
filing date -
Jun 6, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully