Authorization of services in a conditional access system

Details Authorization of services in a conditional access system Authorization of services in a conditional access system

2005-11-29

2005-11-29

Lamarre, Guy (Department: 2133)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S229000, C380S259000, C380S217000, C713S159000

Reexamination Certificate

active

06971008

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.

REFERENCES:
patent: 4155042 (1979-05-01), Permut et al.
patent: 4358672 (1982-11-01), Hyatt et al.
patent: 4388643 (1983-06-01), Aminetzah
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4531020 (1985-07-01), Wechselberger et al.
patent: 4600921 (1986-07-01), Thomas et al.
patent: 4613901 (1986-09-01), Gilhousen et al.
patent: 4634807 (1987-01-01), Chorley et al.
patent: 4649533 (1987-03-01), Chorley et al.
patent: 4658093 (1987-04-01), Hellman
patent: 4712238 (1987-12-01), Gilhousen et al.
patent: 4712239 (1987-12-01), Frezza et al.
patent: 4736422 (1988-04-01), Mason
patent: 4823385 (1989-04-01), Hegendörfer
patent: 4864615 (1989-09-01), Bennett et al.
patent: 4866770 (1989-09-01), Seth-Smith et al.
patent: 4885777 (1989-12-01), Takaragi et al.
patent: 4887296 (1989-12-01), Horne
patent: RE33189 (1990-03-01), Lee et al.
patent: 4912762 (1990-03-01), Lee et al.
patent: 4982430 (1991-01-01), Frezza et al.
patent: 4993068 (1991-02-01), Piosenka et al.
patent: 5003591 (1991-03-01), Kauffman et al.
patent: 5018196 (1991-05-01), Takaragi et al.
patent: 5029207 (1991-07-01), Gammie
patent: 5036537 (1991-07-01), Jeffers et al.
patent: 5073935 (1991-12-01), Pastor
patent: RE33808 (1992-01-01), Wright, Jr.
patent: 5124117 (1992-06-01), Tatebayashi et al.
patent: 5142578 (1992-08-01), Matyas et al.
patent: 5151782 (1992-09-01), Ferraro
patent: 5155591 (1992-10-01), Wachob
patent: 5175765 (1992-12-01), Perlman
patent: 5231665 (1993-07-01), Auld et al.
patent: 5235643 (1993-08-01), Anderson et al.
patent: 5237610 (1993-08-01), Gammie et al.
patent: 5243652 (1993-09-01), Teare et al.
patent: 5249230 (1993-09-01), Mihm, Jr.
patent: 5270822 (1993-12-01), Choi
patent: 5282248 (1994-01-01), DeJoy
patent: 5282249 (1994-01-01), Cohen et al.
patent: 5285497 (1994-02-01), Thatcher, Jr.
patent: 5301233 (1994-04-01), Coutrot et al.
patent: 5341425 (1994-08-01), Wasilewski et al.
patent: 5343527 (1994-08-01), Moore
patent: 5381477 (1995-01-01), Beyers, III et al.
patent: 5381481 (1995-01-01), Gammie et al.
patent: 5400401 (1995-03-01), Wasilewski et al.
patent: 5402490 (1995-03-01), Mihm, Jr.
patent: 5414773 (1995-05-01), Handelman
patent: 5420866 (1995-05-01), Wasilewski
patent: 5425101 (1995-06-01), Woo et al.
patent: 5432542 (1995-07-01), Thibadeau et al.
patent: 5440633 (1995-08-01), Augustine et al.
patent: 5465299 (1995-11-01), Matsumoto et al.
patent: 5473692 (1995-12-01), Davis
patent: 5481542 (1996-01-01), Logston et al.
patent: 5481613 (1996-01-01), Ford et al.
patent: 5488410 (1996-01-01), Lieberfarb et al.
patent: 5497422 (1996-03-01), Tysen et al.
patent: 5499294 (1996-03-01), Friedman
patent: 5499295 (1996-03-01), Cooper
patent: 5506904 (1996-04-01), Sheldrick et al.
patent: 5509073 (1996-04-01), Monnin
patent: 5519780 (1996-05-01), Woo et al.
patent: 5524052 (1996-06-01), Augustine et al.
patent: 5550984 (1996-08-01), Gelb
patent: 5557678 (1996-09-01), Ganesan
patent: 5557765 (1996-09-01), Lipner et al.
patent: 5559889 (1996-09-01), Easter et al.
patent: 5563950 (1996-10-01), Easter et al.
patent: 5565909 (1996-10-01), Thibadeau et al.
patent: 5568552 (1996-10-01), Davis
patent: 5568554 (1996-10-01), Eastlake, 3rd
patent: 5583939 (1996-12-01), Chang et al.
patent: 5588058 (1996-12-01), Le Berre
patent: 5590202 (1996-12-01), Bestler et al.
patent: 5621793 (1997-04-01), Bednarek et al.
patent: 5671276 (1997-09-01), Eyer et al.
patent: 5675649 (1997-10-01), Brennan et al.
patent: 5740246 (1998-04-01), Saito
patent: 5742677 (1998-04-01), Pinder et al.
patent: 5764770 (1998-06-01), Schipper et al.
patent: 5787172 (1998-07-01), Arnold
patent: 5857020 (1999-01-01), Peterson, Jr.
patent: 5862220 (1999-01-01), Perlman
patent: 5870474 (1999-02-01), Wasilewski et al.
patent: 5920626 (1999-07-01), Durden et al.
patent: 6005938 (1999-12-01), Banker et al.
patent: 6105134 (2000-08-01), Pinder et al.
patent: 6246767 (2001-06-01), Akins et al.
patent: 0 723 371 (1996-07-01), None
patent: 0 752 786 (1997-01-01), None
patent: WO 94/13107 (1994-06-01), None
patent: WO 95/29560 (1995-11-01), None
ISO/IEC 13818-1, “Information Technology—Generic Coding of Moving Pictures and Associated Audio Systems,” Draft of: Nov. 13, 1994.
ISO/IEC JTC1/SC29/WG11, “Universal Multi-Program Multiplex and Transport for MPEG-2 Systems,” Jan. 1993.
ISO/IEC JTC1/SC29/WG11, “An MGEG-2 Multi-Program Multiplex Syntax,” Jan. 1993.
ISO/IEC JTC1/SC2/WG11, “Requirements and Method for High-Level Multiplexing of MPEG and Other Digital Service Bitstreams with Universal Transport Layer,” Nov. 1992.
Whitfield, Diffie, “Authentication and Authenticated Key Exchanges,” Designs, Codes and Cryptography, An International Journal, vol. 2, No. 2, Jun. 1992, pp. 107-125.
Schneier, Bruce, “Applied Cryptography Second Edition: Protocols, Algorithms and Source Code in C,” pp. 357-363.
Menezes, Alfred J., “Handbook of Applied Cryptography,” pp. 506-525.
TM-1244 Rev. 4, “Final Technical Report of the Conditional Access Specialist Group,” Nov. 17, 1994.
Coutrot et al., “A Single Conditional Access System for Satellite-Cable and Terrestrial TV,” IEEE Transactions on Consumer Electronics, vol. 35, No. 3, Aug. 1989, pp. 464-468.
Louis Claude Guillou and Jean-Luc Giachetti, “Encipherment and Conditional Access,” SMPTE Journal, 103 (1994) Jun., No. 6, White Plains, NY.

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