Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2000-09-26
2008-07-15
Sheikh, Ayaz (Department: 2131)
Cryptography
Video cryptography
Copy protection or prevention
C380S203000, C380S045000, C380S239000, C380S241000, C380S228000, C380S229000, C380S230000, C380S234000, C713S193000, C713S194000
Reexamination Certificate
active
07400725
ABSTRACT:
An information recording medium, such as an optical disk or the like, is provided for recording at least copyrighted content information and cipher key information. A part of the content information is scrambled and recorded in the information recording medium, and the scrambled and recorded part of the content information is obtained through scrambling using scramble key information, which is obtained by converting the cipher key information by the use of a non-scrambled part of the content information. The information recording medium has a recording area divided into a plurality of sectors. A plurality of data which the content information is divided into is recorded in the sectors. The non-scrambled part of the content information includes copy control information and a part of the content information that changes sector by sector.
REFERENCES:
patent: 5917910 (1999-06-01), Ishiguro et al.
patent: 6021199 (2000-02-01), Ishibashi
patent: RE37052 (2001-02-01), Park
patent: 6266481 (2001-07-01), Lee et al.
patent: 6343281 (2002-01-01), Kato
patent: 6347846 (2002-02-01), Nakamura
patent: 6535858 (2003-03-01), Blaukovitsch et al.
patent: 6611534 (2003-08-01), Sogabe et al.
patent: 6694023 (2004-02-01), Kim
patent: 6832319 (2004-12-01), Bell et al.
patent: 7031470 (2006-04-01), Bar-On
patent: 2001/0019615 (2001-09-01), Kato et al.
patent: 0 802 535 (1997-10-01), None
patent: 0802535 (1997-10-01), None
patent: 7-249264 (1995-09-01), None
patent: 11-39795 (1999-02-01), None
patent: 408290 (2000-10-01), None
patent: 97/14147 (1997-04-01), None
Fukushima Yoshihisa
Ishihara Hideshi
Yokota Kaoru
Yumiba Takashi
Chen Shin-Hon
Sheikh Ayaz
LandOfFree
Information recording medium for recording a scrambled part... 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 medium for recording a scrambled part..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording medium for recording a scrambled part... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3968440