| 摘要 |
PROBLEM TO BE SOLVED: To provide a system capable of preventing information from being leaked to a third party as far as possible even when a device which stores the information is left somewhere or lost. SOLUTION: The radio communication system is constituted by providing a main communication device which stores the information and a sub communication device having a storage device and receiving the information by radio communication with the main communication device to store it in the storage device, wherein the radio communication can be executed only when the sub communication device is located within a predetermined range around the main communication device and the sub communication device erases the information stored in the storage device at predetermined timing. COPYRIGHT: (C)2008,JPO&INPIT
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