Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2005-01-11
2005-01-11
Smithers, Matthew (Department: 2137)
Cryptography
Video cryptography
Copy protection or prevention
C705S057000, C380S201000
Reexamination Certificate
active
06842521
ABSTRACT:
A data copy control method is applied to a computer system that has a reproducing device which receives reproducing data read out by a drive device. A shared key is produced in the drive device and the reproducing device. The reproducing data in the drive device is enciphered using copy control data read out by the drive device and the shared key. The enciphered reproducing data and the copy control data are transferred to the reproducing device. The enciphered reproducing data is deciphered using the copy control data received by the drive device and the shared key.
REFERENCES:
patent: 5081676 (1992-01-01), Chou et al.
patent: 5222137 (1993-06-01), Barrett et al.
patent: 5319705 (1994-06-01), Halter
patent: 5337357 (1994-08-01), Chou et al.
patent: 5398285 (1995-03-01), Borgelt et al.
patent: 5416842 (1995-05-01), Aziz
patent: 5513260 (1996-04-01), Ryan
patent: 5604800 (1997-02-01), Johnson
patent: 5615264 (1997-03-01), Kazmierczak et al.
patent: 5719937 (1998-02-01), Warren et al.
patent: 5719938 (1998-02-01), Haas et al.
patent: 5784460 (1998-07-01), Blumenthal et al.
patent: 5923754 (1999-07-01), Angelo et al.
patent: 6347846 (2002-02-01), Nakamura
patent: 1054693 (1991-09-01), None
patent: 0674440 (1995-09-01), None
patent: 61-72345 (1986-04-01), None
patent: 3-187067 (1991-08-01), None
patent: 6-4026 (1994-01-01), None
patent: 6-124539 (1994-05-01), None
patent: 6-181044 (1994-06-01), None
patent: 7-221751 (1995-08-01), None
patent: 7-235131 (1995-09-01), None
Office Action, dated Apr. 27, 2004, from the Japanese Patent Office for Patent Application No. 2001-036025.
“Conventional data encryption key (DEK) “packet””, File Formats Used by PGP 2.6, (May 22, 1994).
“Conventional key encrypted data packet”, File Formats Used by PGP 2.6 (May 22, 1994).
DVD Copy Protection: An Agreement At Last? Protecting Intellectual Property Rights in the Age of Technology, Dana J. Parker.
“A Day at the DVD Forum: technical notes”, DVD Forum, C. Fogg, Apr. 22, 1996.
“RSA: A Brief Breakdown”, Ron Rivest, Adi Shamir; Leonard Adelman; 1977.
“Patenting Cryptography Systems” RSA FAQ topics #5 and #6.
“Exporting Cryptography Systems” RSA FAQ Topics #5 and #6.
“Public-Key Encryption”, What is Public-Key Encryption, Oct. 30, 1996.
“Encryption”, What is Encryption, Oct. 30, 1996.
“Multimedia PCS: Video” vol. 04; No. 10; p. 191, Oct. 1996.
“Public-Key vs. Private-Key”; Advantages and Disadvantages; Oct. 30, 1996.
Web Page; nbeng.com; re: DVD material, Oct. 21, 1996.
Schneier, Bruce, Applied Cryptography : Protocols, Algorithms, and Source Code in C. 10/95, p. 513.
Schneier, Bruce, Applied Cryptography : Protocols, Algorithms, and Source Code in C. 10/95. Chapter 8, Section 3.
Schneier, Bruce, Applied Cryptography : Protocols, Algorithms, and Source Code in C. Chapters 3 and 22, Oct. 1995.
LandOfFree
Method and apparatus to control copying from a drive device... 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 to control copying from a drive device..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to control copying from a drive device... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3385206