Valuable-medium monitoring system, valuable-medium monitoring method, server, and terminal device

A valuable-medium monitoring method for detecting a circulation-unsuitable medium that is a valuable medium unsuitable for circulation as being involved in crime, the valuable-medium monitoring method comprising:

• in one terminal device,
• extracting information on a valuable medium,
• determining whether or not the valuable medium is a circulation-unsuitable medium based on the extracted information on the valuable medium;
• and
• in response to a determination that the valuable medium is a circulation-unsuitable medium, transmitting information on the circulation-unsuitable medium to a server, and
• in the server,
• storing pieces of information on a plurality of circulation-unsuitable media, the pieces of information being grouped into a plurality of groups;
• and
• transmitting a specific group of information on a circulation-unsuitable medium to which the information on the circulation-unsuitable medium transmitted by the one terminal device corresponds to another terminal device satisfying a predetermined condition.

A valuable-medium monitoring system for detecting a circulation-unsuitable medium that is a valuable medium unsuitable for circulation as being involved in crime, the valuable-medium monitoring system comprising:

• a plurality of terminal devices;
• and
• a server configured to transmit information to and receive information from the plurality of terminal devices, wherein
• each terminal device of the plurality of terminal devices comprises a transmitter configured to transmit image data of a valuable medium to the server,
• the server comprises:
• a controller configured to extract information on the valuable medium from the image data transmitted from each of the plurality of terminal devices and determine whether or not the valuable medium is a circulation-unsuitable medium based on the extracted information on the valuable medium;
• a memory configured to store pieces of information on a plurality of circulation-unsuitable media, the pieces of information being grouped into a plurality of groups;
• and
• a transmitter configured to, in response to a determination by the controller that the valuable medium is a circulation-unsuitable medium, transmit a specific group of information on a circulation-unsuitable medium to which the circulation-unsuitable medium corresponds to any other of the plurality of terminal devices satisfying a predetermined condition.