| 摘要 |
The apparatus includes a server for file distribution that can restrict the use of files within a certain limit and file distribution system therewith. The file distribution server includes a file data memory to store digital file data to distribute, a program memory to store a computer program to manage and play back digital file data, and a transfer-processing unit 26 to transfer the management/playback program, file data and data on a date at which playback can be started and by when it has to be finished. The management/playback program carries out the following steps: playing back files after it is started on the user terminal, reading time data of user terminal and checking if read time is between the date at which playback can be started and when it has to be finished, deleting file data when the read time is not in the period, making it possible to play back when the read time is in the period, and rewriting date at which playback can be started with read time data.
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