Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2004-02-05
2008-09-16
Moazzami, Nasser (Department: 2136)
Cryptography
Video cryptography
Video electric signal modification
C380S262000
Reexamination Certificate
active
07426274
ABSTRACT:
A video source device includes a cipher unit. The video source device uses the cipher unit to generate cipher bits for ciphering video to be transmitted to protect the video from unauthorized copying. The video source device authenticates video receiving devices using a symmetric ciphering/deciphering process that requires the video source device to generate and provide the video receiving device with a pseudo random number as the seed/basis number for the symmetric ciphering/deciphering process. The video source device is further provided with a state machine that controls the cipher unit to generate the required pseudo random number for the video source devices, thereby eliminating the need of having to provide separate circuitry to generate the required pseudo random numbers.
REFERENCES:
patent: 3798360 (1974-03-01), Feistel
patent: 4316055 (1982-02-01), Feistel
patent: 4613901 (1986-09-01), Gilhousen et al.
patent: 4641102 (1987-02-01), Coulthart et al.
patent: 4953208 (1990-08-01), Ideno
patent: 5020106 (1991-05-01), Rabold et al.
patent: 5195136 (1993-03-01), Hardy et al.
patent: 5509073 (1996-04-01), Monnin
patent: 5590194 (1996-12-01), Ryan
patent: 5621799 (1997-04-01), Katta et al.
patent: 5673319 (1997-09-01), Bellare et al.
patent: 5680131 (1997-10-01), Utz
patent: 5778069 (1998-07-01), Thomlinson et al.
patent: 5825879 (1998-10-01), Davis
patent: 5852472 (1998-12-01), Prasad et al.
patent: 5862150 (1999-01-01), Lavelle et al.
patent: 5940509 (1999-08-01), Jovanovich et al.
patent: 6005940 (1999-12-01), Kulinets
patent: 6061449 (2000-05-01), Candelore et al.
patent: 6128310 (2000-10-01), Chow et al.
patent: 6167136 (2000-12-01), Chou
patent: 6452959 (2002-09-01), McDonough
patent: 6466669 (2002-10-01), Matsui et al.
patent: 6477252 (2002-11-01), Faber et al.
patent: 0 599 366 (1994-01-01), None
patent: WO 96/06504 (1996-02-01), None
patent: WO 99/18729 (1999-04-01), None
patent: WO 99/19822 (1999-04-01), None
patent: WO 01/17251 (2001-08-01), None
“The Art of Computer Programming, vol. 2/Seminumerical Algorithms,” vol. 2, 1969, pp. 30-31, Addison-Wesley Publishing Company, Inc., USA.
Gustavus J. Simmons, “Symmetric and Asymmetric Encryption,” Computing Surveys, vol. 11, No. 4, Dec. 1979, pp. 305-330.
B. Schneier, “Applied Cryptography: Protocols, Algorithms and Source Code in C,” Second Edition, 1996, Chapters 2-6 and 12-17, Published by Wiley & Sons, Inc., USA.
Schneier et al., “Unbalanced Feistel Networks and Block-Cipher Design,” Third International Workshop Proceedings, Feb. 1996, pp. 121-144, USA.
William Stallings, “Cryptography and Network Security,” Principles and Practice, Second Edition, Jun. 4, 1998, Chapter 3, 47 pages, Prentice-Hall, Inc., USA.
“High-Bandwidth Digital Content Protection,” Feb. 2000, pp. 1-11, Silicon Image, Inc.
“High-Bandwidth Digital Content Protection System, Revision 1.0,” Feb. 17, 2000, pp. 1-59, Intel Corporation, USA.
“Digital Visual Interface (DVI),” Nov. 2001, pp. 1-15, InFocus Corporation, USA.
Howard M. Heys, “An Analysis of the Statistical Self-Synchronization of Stream Ciphers,” INFOCOM 2001, IEEE, pp. 897-904, USA.
Howard M. Heys, Delay Characteristics of Statistical Cipher Feedback Mode, IEEE, 2001, pp. 5-9, USA.
Faber Robert W.
Graunke Gary L.
Lee David A.
Traw Brendan S.
No associations
LandOfFree
Method and apparatus for generating pseudo random numbers in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for generating pseudo random numbers in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generating pseudo random numbers in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3982533