| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a device for effectively preventing unauthorized use of content, and to provide a recording medium and method. <P>SOLUTION: Content including broken data different from proper content configuration data is recorded in the information recording medium. Conversion data as the proper content configuration data to be replaced by the broken data and a conversion table storing set position information with respect to content of the conversion data are stored in the information recording medium. In a content reproduction process, the content configuration data is replaced by the conversion data in accordance with the conversion table recorded in the information recording medium. Even if there is leakage of an encryption key corresponding to encrypted content recorded in the information recording medium, the content is not reproduced in a device capable of acquiring the conversion data, and unauthorized use of the content is prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
