| 摘要 |
PROBLEM TO BE SOLVED: To provide a contents copy tracing management system where a center manages history information denoting names and times of making copies of digital contents in a unified way so as to trace copies even when the copies are made for a plurality of number of times. SOLUTION: A contents copying machine 20 reads a contents ID from a contents copy original in which a contents ID is imbedded and transmits the contents ID and information of a copy event attribute that are read to a contents ID management center 10 via network. The contents ID management center 10 acquires the original of the contents from the received contents ID, gives a new contents ID to the original, records the information of the contents ID and the copy event attribute, imbeds the new contents ID to the original of the contents and returns the result to a copy request source. The contents copying machine 20 outputs the returned original as a copy result. |
