Method for partially encrypting program data

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8548166
APP PUB NO 20050259813A1
SERIAL NO

10602986

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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 partially-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)

  • CISCO TECHNOLOGY, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pinder, Howard G Norcross, US 47 3803
Wasilewski, Anthony J Alpharetta, US 58 6317

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