Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2003-09-11
2008-05-20
Trammell, James P. (Department: 3694)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C713S176000, C705S051000
Reexamination Certificate
active
07376626
ABSTRACT:
There are provided an information recording medium, and an information processing apparatus and method by which content usage in compliance with copyright protection is made possible in information processing devices such as a CD player and a PC. In the information recording medium, a first data storage area on which a copying prevention process is performed, and a second data storage area in which is stored an encrypted content file containing encrypted content, and encrypted key data such that key data for use in a decryption process is encrypted and which can be decrypted only in a device having a license are set. It becomes possible to play back the recorded content of a first data recording field in a playback device such as a CD player, and even in an information processing device, such as a PC, it is possible to decrypt and play back encrypted content of a second data recording field under the condition of obtaining a license.
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Morin, Jean-Henry Konstantas, Dimitri; Commercialization of electronic information, Apr.-Jun. 2000, Journal of End User Computing, vol. 12n2, pp. 20-32.
Fukui Toshiharu
Kitaya Yoshimichi
Kurihara Akira
Morita Masao
Nagai Norihiro
Badii Behrang
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sony Corporation
Trammell James P.
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