METHOD AND SYSTEM FOR MONITORING USE OF DIGITAL COPYRIGHTED WORK, DIGITAL COPYRIGHTED WORK RECORDING DEVICE, AND DIGITAL COPYRIGHTED WORK REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To properly and smoothly distribute digital copyrighted work by preventing a digital copyrighted work from illegally being used, e.g. copied without permission, monitoring whether it is used with regular permission, and demanding the payment of the charge for the use of the digital copyrighted work. SOLUTION: A use permit is issued according to an application for the use of the digital copyrighted work and added to the digital copyrighted work by digital watermarking. Here, an identification code for a use device that a user uses is incorporated in the permit to monitor whether the use of the distributed digital copyrighted work is given proper permission. The issue of the permit can be conditioned by the payment of the use charge.