| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a system for recording the presence of a terminal unit at a specific location, which makes a malicious user hard to impersonate as being at the specific location, without requiring a network environment at the specific location.SOLUTION: A system includes: one or more ID origination devices (1); a management device (2) connected to each ID origination device (1); one or more terminal units (3); and a server (4) communicating with the management device (2) and each terminal unit (3). The management device (2) capable of changing an ID originated from the ID origination device (1), transmits the changed ID to the server (4). The server (4) obtains the location of the terminal unit (3) on the basis of the received ID.</p> |
