The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2008
Filed:
Sep. 11, 2003
Norihiro Nagai, Kanagawa, JP;
Akira Kurihara, Kanagawa, JP;
Yoshimichi Kitaya, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Naomi Urano, Kanagawa, JP;
Masao Morita, Tokyo, JP;
Toshiharu Fukui, Kanagawa, JP;
Norihiro Nagai, Kanagawa, JP;
Akira Kurihara, Kanagawa, JP;
Yoshimichi Kitaya, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Naomi Urano, Kanagawa, JP;
Masao Morita, Tokyo, JP;
Toshiharu Fukui, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
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.