Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2011-08-02
2011-08-02
Davis, Zachary A (Department: 2492)
Cryptography
Video cryptography
Copy protection or prevention
C380S227000, C380S044000, C380S281000, C713S189000, C705S057000, C705S058000, C705S059000, C360S060000, C369S084000, C369S085000
Reexamination Certificate
active
07991155
ABSTRACT:
To provide a backup management device that deletes a content so as to be restorable in the future while protecting a copyright of the content, in a case where there exists a backup of the content. In an HD recorder, a first information storage unit stores a content, a second information storage unit stores a backup of the content, a secure storage unit stores a hash value of the content. If receiving an instruction to delete the content so as to be restorable, a control unit deletes the content from the first information storage unit. When the content is played back, an encryption processing unit applies a calculation to the content to generate detection information, and the control unit compares the hash value with the detection information to judge whether the content has been tampered.
REFERENCES:
patent: 6701249 (2004-03-01), Casino
patent: 2002/0019814 (2002-02-01), Ganesan
patent: 2002/0141579 (2002-10-01), Murase et al.
patent: 2003/0007640 (2003-01-01), Harada et al.
patent: 2003/0009681 (2003-01-01), Harada et al.
patent: 2003/0074569 (2003-04-01), Yamauchi et al.
patent: 2003/0099460 (2003-05-01), Imada et al.
patent: 2005/0137983 (2005-06-01), Bells
patent: 2008/0250082 (2008-10-01), Dive-Reclus
patent: 2000-298974 (2000-10-01), None
patent: 2002-297452 (2002-10-01), None
patent: EP1261185 (2002-11-01), None
patent: 2003-30458 (2003-01-01), None
patent: 2003-224557 (2003-08-01), None
patent: 2003-337754 (2003-11-01), None
patent: 2004-13763 (2004-01-01), None
patent: 2004-13763 (2004-01-01), None
patent: 2004/046899 (2004-06-01), None
Fujioka Soichiro
Harada Shunji
Ito Yoshikatsu
Nakano Toshihisa
Ohmori Motoji
Davis Zachary A
Panasonic Corporation
Shan April Y
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Backup management device, backup management method, computer... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Backup management device, backup management method, computer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backup management device, backup management method, computer... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2738402