Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2008-05-27
2008-05-27
Sheikh, Ayaz (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S165000, C713S187000, C726S026000, C380S201000, C380S229000, C380S230000, C380S255000, C705S051000, C360S062000
Reexamination Certificate
active
10392309
ABSTRACT:
An information recording apparatus has a content encryption section which encrypts content information with an encryption key and outputs encrypted content information, a control section which identifies an already moved area in the content information and generates a reproduction enable condition containing reproducible area information indicating a movable area, a hash arithmetic device which executes hash calculation for the reproduction enable condition and stores an arithmetic result in a register, and a hard disk drive which records the encrypted content information output from the encryption section and the reproduction enable condition. Even content information that remains after interruption during movement can be moved.
REFERENCES:
patent: 6094723 (2000-07-01), Otsuka
patent: 6449724 (2002-09-01), Sakagami
patent: 6738904 (2004-05-01), Linnartz et al.
patent: 6782190 (2004-08-01), Morito
patent: 6785192 (2004-08-01), Ukita et al.
patent: 6832319 (2004-12-01), Bell et al.
patent: 6889323 (2005-05-01), Sugahara et al.
patent: 7003046 (2006-02-01), Hayami et al.
patent: 7092911 (2006-08-01), Yokota et al.
patent: 7096504 (2006-08-01), Tagawa et al.
patent: 7209558 (2007-04-01), Okuyama
patent: 2002/0025039 (2002-02-01), Kato et al.
patent: 2003/0152223 (2003-08-01), Yamada
patent: 2006/0053249 (2006-03-01), Yamaki et al.
patent: 997900 (2000-05-01), None
patent: 1450367 (2004-08-01), None
patent: 07-230668 (1995-08-01), None
patent: 10-241288 (1998-09-01), None
patent: 2000-30366 (2000-01-01), None
patent: 2000-305846 (2000-11-01), None
patent: 2000-306328 (2000-11-01), None
T.S. Perry, DVD copy protection: take 2, 2005, IEEE, pp. 38-39.
Li et al, Security enhanced MPEG player, 1996, IEEE, pp. 169-175.
Japanese Office Action dated Nov. 9, 2004, for Japanese Patent Application No. 2002-079621.
Moorthy Aravind K
Pillsbury Winthrop Shaw & Pittman LLP
Sheikh Ayaz
LandOfFree
Information recording/reproducing apparatus and method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Information recording/reproducing apparatus and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording/reproducing apparatus and method of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3924244