Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2002-08-27
2010-06-29
Zand, Kambiz (Department: 2434)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
Reexamination Certificate
active
07747871
ABSTRACT:
An information recording apparatus comprises an encryption section encrypting contents information and also a license condition referred to to limit use of the contents information and a decoding key for decoding the encrypted contents information to generate license information, and a recording section recording the encrypted contents information and the generated license information on a recording medium. An information reproducing apparatus comprises a decoder unit decoding the license information recorded on the recording medium using a second decoding key for decoding the license information and deciding on the basis of the license condition contained in the decoded license information whether the contents information can be used. If it is decided that the contents information can be used, the encrypted contents information recorded on the recording medium is decoded using the first decoding key contained in the decoded license information.
REFERENCES:
patent: 4757534 (1988-07-01), Matyas et al.
patent: 4817140 (1989-03-01), Chandra et al.
patent: 4965568 (1990-10-01), Atalla et al.
patent: 5109413 (1992-04-01), Comerford et al.
patent: 5138712 (1992-08-01), Corbin
patent: 5392351 (1995-02-01), Hasebe et al.
patent: 5555304 (1996-09-01), Hasebe et al.
patent: 5680376 (1997-10-01), Katayama et al.
patent: 5745879 (1998-04-01), Wyman
patent: 5796824 (1998-08-01), Hasebe et al.
patent: 5805800 (1998-09-01), Kotani et al.
patent: 5867579 (1999-02-01), Saito
patent: 5915018 (1999-06-01), Aucsmith
patent: 5917910 (1999-06-01), Ishiguro et al.
patent: 5935243 (1999-08-01), Hasebe et al.
patent: 6005839 (1999-12-01), Sako et al.
patent: 6209097 (2001-03-01), Nakayama et al.
patent: 6229896 (2001-05-01), Gotoh et al.
patent: 6353929 (2002-03-01), Houston
patent: 2001/0032088 (2001-10-01), Utsumi et al.
patent: 0 268 139 (1988-05-01), None
patent: 0 561 685 (1993-09-01), None
patent: 0 679 978 (1995-11-01), None
patent: 0 706 174 (1996-04-01), None
patent: 0 717 338 (1996-06-01), None
patent: 3-83132 (1991-04-01), None
patent: 5-257816 (1993-10-01), None
patent: 8-69419 (1996-03-01), None
patent: 11-283327 (1999-10-01), None
patent: 11136695 (2000-11-01), None
patent: 2005-137437 (2005-06-01), None
patent: WO 97/43761 (1997-11-01), None
Schneier, Bruce. Applied Cryptography. Second Edition. John Wiley & Sons. 1996. Pages 4 and 5.
Patent Abstract of Japan, vol. 015, No. 255 (P-1221), Jun. 27, 1991, JP 03 083132, Apr. 9, 1991.
Ryoichi Mori, et al., “Proposition of Software Service System (SSS)”, The Institute of Electronics, Information and Communication Engineers, vol. J70-D, No. 1, Jan. 25, 1987, pp. 70-81 (Cited Non-Patent Reference No. 02-003103).
Yasuhiro Ohtaki, et al., “Cryptographic Managements for Super distribution”, The Institute of Electronics, Information and Communication Engineers, vol. 190, No. 460, Mar. 8, 1991, pp. 33-42 (Domestic Institution Article No. 2000-00361-004).
Akiyama Koichiro
Hirakawa Hideki
Kambayashi Toru
Sugaya Toshihiro
Sumita Kazuo
Gee Jason K
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Zand Kambiz
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