| 摘要 |
PURPOSE:To easily sell/purchase information while protecting the copyright of a copyright reserver. CONSTITUTION:Information can be recorded in a recording medium in an information recording device loadable/ejectable to/from an information reproducing device. In the loaded state of the recording device in the reproducing device, the information in the medium can be reproduced by the reproducing device. On the other hand, management information can be recorded in the recording device and the management information is updated in accordance with the using state of information. When recorded contents reach a prescribed volume of information to be used, the succeeding information reproducing is inhibited to protect copyright. The recording device can be loaded/ejected to/from an information providing device, and in the loaded state of the recording device to the providing device, required information is recorded in the recording medium of the recording device. Simultaneously management information is updated and information corresponding to the amount of payment can be used. |
