Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Packet header designating cryptographically protected data
Reexamination Certificate
2004-01-14
2009-02-10
Peeso, Thomas R (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Packet header designating cryptographically protected data
C713S168000, C713S189000, C713S191000, C713S193000
Reexamination Certificate
active
07490236
ABSTRACT:
A conditional access overlay system utilizing partial encryption without requiring additional program identifiers. The conditional access overlay system generates duplicate critical packets for separate encryption that are sent using the same packet identifier. The rest of the content stream is sent in the clear. However, these duplicated packets are sent without incrementing a continuity counter relative to one another. The overlay packets with non-incremented continuity counter are sent as the second packet immediately following the original critical packet. At the receivers, the incumbent set-top will use the first of the two encrypted packets while the overlay set-top is programmed to use the second of the two encrypted packets. Therefore, methods for verifying alignment of associated packets may be used to distinguish between multiple encryption methods in conditional access overlay systems.
REFERENCES:
patent: 5420866 (1995-05-01), Wasilewski
patent: 6181706 (2001-01-01), Anderson et al.
patent: 6424717 (2002-07-01), Pinder et al.
patent: 2002/0188567 (2002-12-01), Candelore
patent: 2002/0194613 (2002-12-01), Unger
patent: 2002/0196939 (2002-12-01), Unger et al.
patent: 2003/0016949 (2003-01-01), Unger
patent: 2003/0021412 (2003-01-01), Candelore et al.
patent: 2003/0026423 (2003-02-01), Unger et al.
patent: 2003/0046686 (2003-03-01), Candelore et al.
patent: 2003/0081776 (2003-05-01), Candelore
patent: 2004/0139337 (2004-07-01), Pinder et al.
patent: 2405899 (2003-04-01), None
patent: 1397007 (2003-08-01), None
Scientific-Atlanta, Inc. Pending U.S. Appl. No. 10/602,987, filed Jun. 25, 2003, Title: “Method for Partially Encrypting Program Data,” Inventors: Anthony J. Wasilewski and Howard G. Pinder.
Scientific-Atlanta, Inc. Pending U.S. Appl. No. 10/629,839, filed Jul. 30, 2003, Title: “Methods and Apparatus for Providing a Partial Dual-Encrypted Stream in a Conditional Access Overlay System,” Inventors: Howard G. Pinder, William D. Woodward, Jr., Jonathan Evans, and Anthony J. Wasilewski.
Scientific-Atlanta, Inc. Pending U.S. Appl. No. 10/602,986, filed Jun. 25, 2003, Title: “Method for Partially Encrypting Program Data,” Inventors: Anthony J. Wasilewski and Howard G. Pinder.
Scientific-Atlanta, Inc. Pending U.S. Appl. No. 10/602,988, filed Jun. 25, 2003, Title: “Method for Partially Encrypting Program Data,” Inventors: Anthony J. Wasilewski and Howard G. Pinder.
Scientific-Atlanta, Inc. Pending U.S. Appl. No. 10/719,161, filed Nov. 21, 2003, Title: “A Partial Dual-Encrypted Stream Utilizing Program Map Tables,” Inventors: Howard G. Pinder, Jonathan Evans, Anthony J. Wasilewski and William D. Woodward, Jr.
Standardiztion of Conditonal Access Systems for Digital Pay Television By—D Van Schoonevled, pp. 217-225, 1996.
Information Technology-Generic Coding of Moving Pictures and Associated Autio Information By—Technologies of Information, pp. I-XY, XP00067435—p. 18, Apr. 15, 1996.
Cisco Technology Inc.
Peeso Thomas R
LandOfFree
Conditional access overlay partial encryption using MPEG... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Conditional access overlay partial encryption using MPEG..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conditional access overlay partial encryption using MPEG... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4135770