| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an equipment control system capable of surely carrying out authentication of a transmission signal to obtain highly confidential information by making an another concept different from a mere numerical procession, having high resistance preventing an unjust copy of a signal code and having favorable miniaturization and power economization of a pocket machine. <P>SOLUTION: The portable machine 10 makes transmitting data including an intrinsically set ID code, the renewal for every transmission and a time code showing spare moments in transmissions of control data, and the next transmission is carried out so that the spare moments after the transmission of the transmitting data can become the time corresponding to the time code. A host machine 20 decides the justification of the ID code by the ID code comparison section 24, a time code comparison section 26 decides whether or not the received time code and the definition shown by a time code definition section 25 have a proper relation, the spare moments (receiving intervals) of a receiving signal are measured with a section timer 27, and its measured value (interval value) is collated with a decision control section 28 to make decision of justification from time component parts. <P>COPYRIGHT: (C)2007,JPO&INPIT |
