| 摘要 |
<p>PURPOSE:To provide an information recording medium which enables easy detection of wrongdoings such as forgery, falsification, and alteration, retains specific information, capable of being recorded in a required part and being invisible from outside, and facilitates the reading of it. CONSTITUTION:On one side of a paper base material 2, an irregular pattern 3 is formed and a concealing layer 4 for covering the magnetic pattern 3 is also formed. Thus, the randomly-formed magnetic pattern 3 expressing identification or specific information can be invisibly stored, also a response output by a magnetic sensor can be obtained and whether the information recording medium 1 is genuine or fake can be judged by processing the signal of the waveform of the output.</p> |
