| 摘要 |
PROBLEM TO BE SOLVED: To provide a data exchange system, with which the acquired individual information of the other person is easily managed and the individual information of a user himself is hardly leaked to the unintended party, service supply system and criminal searching toy with which a facility such as a meeting room can be prevented from being used without permission or maliciously. SOLUTION: On the condition that the try key data of a data exchange device B transmitted from a data exchange device A to a data exchange device B are matched with key data B of the data exchange device B, based on the identification data B of the data exchange device B returned from the other data exchange device B to one data exchange device A, this data exchange system mechanically determines the start of data exchange between one data exchange device A and the other data exchange device B. On the condition the start of data exchange is determined, the service supply systems starts providing services and on the condition the start of data exchange is determined, the criminal search toy determines whether a criminal can be successfully searched or not. |
