| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a device performing authentication work without forcing a user to make an action for the authentication in a user authentication device authenticating the user by utilizing an electromagnetic wave to provide an entry/withdrawal controlling device making use of the user authentication device. <P>SOLUTION: The user authentication device is constituted by having a utilization propriety decision means 5 deciding the propriety of utilization based on the first radio tag 1 equipped with the first ID information for the user and the first antenna 12, the second radio tag 2 equipped with the second ID information different from the first ID information and the second antenna 22 placed in the direction perpendicular to the first antenna 12, the first ID information transmitted from the first antenna 12, a radio tag receiver 4 receiving the second ID information that is transmitted from the second antenna, and it is decided whether or not the ID information received by the receiver 4 is collated with the ID information registered in advance, at the same time, a receiving timing of the first ID information and the second ID information received within a certain time or the number of times of reception. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
