Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Patent
1998-07-31
2000-08-15
Barron, Jr., Gilberto
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
713168, 380241, 380239, 380279, H04L 932, H04N 7167
Patent
active
061051349
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.
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ISO IEC 31818-1, Information Technology--Generic Coding of Moving Pictures and Associated Audio: Systems, Draft Nov. 13, 1994.
Akins, III Glendon L.
Banker Robert O.
Palgon Michael S.
Pinder Howard G.
Barnhardt, II Hubert J.
Barron Jr. Gilberto
Gardner Kelly A.
Massaroni Kenneth M.
Scientific-Atlanta, Inc.
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