REPRODUCTION CONTROL DEVICE, GATE DEVICE, AND REPRODUCTION CONTROL SYSTEM

摘要

It is possible to disclose various techniques enabling both of use and protection of a content and to provide a reproduction control device, a position judgment device, and a reproduction control system permitting reproduction of a content only in one area. In order to achieve this object, when a user passes through an automatic ticket gate to enter a station, the automatic ticket gate transmits a reproduction key for reproducing a content via a mobile telephone to a memory card. When the user passes through an automatic ticket gate to leave a station, the automatic ticket gate instructs the memory card to delete the reproduction key via themobile telephone and the memory card deletes the reproduction key.