Patent ID: 6067028
Filing Date: 2000-05-23
Classification: G07C

Abstract:
An identification signal registering method of registering an identification signal used for a detecting apparatus to identify an apparatus to be detected, comprising the steps of:transmitting a communication request signal from said apparatus to be detected having a previously stored identification signal to said detecting apparatus;receiving said communication request signal by the said detecting apparatus and transmitting a random number signal therefrom to said apparatus to be detected;receiving said random number signal by said said apparatus to be detected and encrypting said previously stored identification signal by using said random number signal to transmit the encrypted previously stored identification signal therefrom to said detecting apparatus;receiving and decrypting said encrypted previously stored identification signal by said detecting apparatus;setting, if said decrypted previously stored identification signal coincides with an identification signal previously stored in said detecting apparatus, said detecting apparatus in its mode for registering an identification signal of said apparatus to be detected; andtransmitting, in said registration mode, second identification signal which is different from said previously stored identification signal from said apparatus to be detected to said detecting apparatus to register this identification signal in said detecting apparatus.