| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a copyright management system for managing the reproduction period of a plurality of contents in a batch. <P>SOLUTION: This contents reproduction device is provided with a reproduction permission ID list, a storage means for storing the validity term information of group ID and a reproduction control part for controlling the reproduction of contents data added with group ID. The reproduction control part reads the group ID from the contents data, and when the read group ID is included in a reproduction permission ID list, and when the current time information does not exceed the validity term information of the read group ID, the reproduction control part permits the reproduction of the contents data, and when the read group ID is not included in the reproduction permission ID list, or when the current time information exceeds the validity term information of the read group ID, the reproduction control part limits the reproduction of the contents data. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
