| 摘要 |
<p>When a user (B) presses a pushbutton, a display unit (10) generates a pseudorandom number based on the time point measured by a first clock and the characteristic ID of the display unit (10), and displays this pseudorandom number that is thus generated on a liquid-crystal display section. When there is an incoming call from a mobile telephone (40), a telephone transmission server (20) receives information generated by operation of the mobile telephone (40). When this information is received, the telephone transmission server (20) generates a pseudorandom number based on the time point measured by a second clock andthe characteristic ID of the display unit (10) that was stored beforehand, and determines whether or not this pseudorandom number that has thus been generated and the aforementioned information that was received coincide. If it decides that these coincide, the telephone transmission server connects the circuit of the mobile telephone (40) with the telephone number of the telephone (30).</p> |
