The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2005
Filed:
Nov. 05, 2002
Anthony J. Wasilewski, Alpharetta, GA (US);
Howard G. Pinder, Norcross, GA (US);
Glendon L. Akins, Iii, Gainesville, GA (US);
Robert O. Banker, Cumming, GA (US);
Anthony J. Wasilewski, Alpharetta, GA (US);
Howard G. Pinder, Norcross, GA (US);
Glendon L. Akins, III, Gainesville, GA (US);
Robert O. Banker, Cumming, GA (US);
Scientific-Atlanta, Inc., Lawrenceville, GA (US);
Abstract
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.