Source authentication of download information in a conditional access system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6526508
SERIAL NO

09748313

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A cable television system provides conditional access to services. The cable television system includes a headend from which service 'instances', or programs, are broadcast and a plurality of set top units for receiving the instances and selectively decrypting the instances for display to system subscribers. The service instances are encrypted using public and/or private keys provided by service providers or central authorization agents. Keys used by the set tops for selective decryption may also be public or private in nature, and such keys may be reassigned at different times to provide a cable television system in which piracy concerns are minimized.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CISCO TECHNOLOGY, INC.SAN JOSE, CA14590

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akins, III Glendon L Gainesville, GA 13 1361
Banker, Robert O Cumming, GA 81 7100
Palgon, Michael S Atlanta, GA 9 1162
Pinder, Howard G Norcross, GA 47 3047
Wasilewski, Anthony J Alpharetta, GA 58 5547

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