| 摘要 |
Data and digital contents which are normally purchased through a network are temporarily stored in a user's communication terminal such as a personal computer, information for preventing illegal copy and additional information for identifying a disk are recorded or printed on a label surface, and only when an authentication is established by a one-to-one relation of the additional information, the normally purchased data and the digital contents, the user is allowed to write the same in a writable optical disk, and the disk is licensed as a product disk. A license managing system comprises: a data sending apparatus 10 which sends content data, meta-information including an image information expressed in a visible manner, and a license recognition code; and a user terminal apparatus 20 which is connected to the data sending apparatus 10 through the Internet, and which writes the meta-information and the license recognition code sent by the data sending apparatus 10 on a label surface of an optical disk 12, and which writes the content data sent from the data sending apparatus 10 on a recording surface of the optical disk 12.
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