| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system for preventing information leakage by prohibiting use of information when divided information is spaced by a predetermined distance or more. <P>SOLUTION: This system comprises a divided information management server, an information terminal, and an authentication device. The divided information management server and the information terminal are connected by a network, and the information terminal and the authentication device can be communicated by a communication means, such as by radio, cable, infrared rays, etc. Electronic information used by the system is divided into two or more pieces, the divided data is stored in two or more of the divided information management servers, the information terminal, and the authentication device, and one or more of the stored divided data is deleted when the distance between the information terminal and the authentication device becomes a predetermined distance or more. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
