| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely prevent skimming by simple constitution. <P>SOLUTION: In a dummy non-contact IC card 4 to be operated by induced electromotive power, when a magnetic field supplied from the outside is detected, a meaningless noise signal NS is generated and output independently of whether a signal is to be received from a reader/writer 2 or not, so that when the magnetic field is detected, communication between the reader/writer 2 and a non-contact IC card 3 can be interrupted by the noise signal NS and skimming to information stored in the non-contact IC card 3 can be surely prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT |
