DIGITAL INFORMATION MANAGEMENT SYSTEM, TERMINAL DEVICE, INFORMATION MANAGEMENT CENTER, AND METHOD OF CONTROLLING DIGITAL INFORMATION

摘要

PROBLEM TO BE SOLVED: To make it possible to prevent illegal copy without losing convenience for proper users. ;SOLUTION: When digital information is used, a registration number and a registration number authentication corresponding to the digital information used from a terminal equipment 2 are transmitted to an information management center 1. The information management center 1 examines a validity of the received registration number and also checks the conditions for the use of the corresponding digital information, and transmits data indicating a permission for the use if the number has a validity, and transmits data for inhibiting the use to terminal device 2, if the number is not duly permitted for the use. The terminal device 2 is arranged so that the digital information is usable thereon only when it receives a permission for the use.;COPYRIGHT: (C)1998,JPO