| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lending management system of contents for which no return procedure of the contents is required and in which browsing of the contents after a lending period is prevented. <P>SOLUTION: The lending management system of contents is provided with a lending store 20 which lends a recording medium 21 in which the encrypted contents and validity of the contents are stored and a player 10 having a control part 2, a radio controlled clock 4, and a storage part 6 which stores an encryption key and the control part 2 decodes the contents by a decoding key, and reproduces them when time of the wave clock is decided to be within the validity read from the recording medium. <P>COPYRIGHT: (C)2004,JPO |
