Information recording device, information playback device,...

Details Information recording device, information playback device,... Information recording device, information playback device,...

2011-04-12

2011-04-12

Moise, Emmanuel L (Department: 2437)

Cryptography

Video cryptography

Copy protection or prevention

Reexamination Certificate

active

07925017

ABSTRACT:
An information recording device uses a data storage device such as media having a built-in flash memory. When data is stored in the data storage device, different encryption keys are used for different sectors. Each encryption key is stored in the header of content. By using a single encryption key for a sector consisting of different blocks, the number of stored encryption keys is limited, and the amount of stored key data is reduced. In accordance with the type of encryption processing, for example, the single DES or the triple DES, one or at least two keys are selected for each sector in order to execute encryption or decryption processing on sector data.

REFERENCES:
patent: 5825877 (1998-10-01), Dan et al.
patent: 5892900 (1999-04-01), Ginter et al.
patent: 5991399 (1999-11-01), Graunke et al.
patent: 5999622 (1999-12-01), Yasukawa et al.
patent: 6014443 (2000-01-01), Mochizuki et al.
patent: 6154840 (2000-11-01), Pebley et al.
patent: 6289102 (2001-09-01), Ueda et al.
patent: 6341164 (2002-01-01), Dilkie et al.
patent: 6598161 (2003-07-01), Kluttz et al.
patent: 6658566 (2003-12-01), Hazard
patent: 6850914 (2005-02-01), Harada et al.
patent: 6853727 (2005-02-01), Foster et al.
patent: 7400725 (2008-07-01), Yumiba et al.
patent: 2005/0114666 (2005-05-01), Sudia
patent: 2005/0185547 (2005-08-01), Nagai et al.
patent: 2006/0021064 (2006-01-01), England et al.
patent: 2006/0053077 (2006-03-01), Mourad et al.
patent: 06-274880 (1994-09-01), None
patent: 07-161172 (1995-06-01), None
patent: 07-249264 (1995-09-01), None
patent: 09-055731 (1997-02-01), None
patent: 11-195269 (1999-07-01), None
patent: 11-250572 (1999-09-01), None
patent: 11-272561 (1999-10-01), None
patent: 11-296978 (1999-10-01), None
patent: 2000-187935 (2000-07-01), None
patent: 2000-215614 (2000-08-01), None
patent: 2000-231760 (2000-08-01), None
patent: 2000-276843 (2000-10-01), None
patent: 2000-293945 (2000-10-01), None
patent: 2002-539557 (2002-11-01), None
patent: WO 97/14147 (1997-04-01), None
patent: WO 00/55736 (2000-09-01), None
Schneier, Bruce. Applied Cryptography. 1996. John Wiley & Sons, Inc. Second Edition. pp. 220-222.
Notification of Reasons for Rejection mailed by Japanese Patent Office on Nov. 24, 2010, in Japanese patent application No. 2000-320802.
Yutaka Matsuura, “Encryption, the published technology, Can you protect data? No. 4 Standard of block encryption”, The Windows, Softbank Corporation, Oct. 1, 1997, vol. 7, No. 10, p. 166-167.

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