MAGNETIC DATA WRITE-IN DEVICE, MAGNETIC DATA READ-OUT DEVICE, AND MAGNETIC DATA RECORDING METHOD

摘要

PROBLEM TO BE SOLVED: To increase write-in capacity of a magnetic card, and to prevent forgery.;SOLUTION: In a magnetic data write-in device 100, when a signal for writing is written in a magnetic card by a F2F recording system, further an arbitrary analog signal can be superimposed and written in a signal of the F2F recording system. The analog signal is constituted by a waveform of small amplitude which does not affect signal determination of the F2F recording system. In the magnetic data write-in device 100, information about write-in errors detected based on a magnetic flux of the F2F recording system inversion position is added to magnetic data as exclusive information of the magnetic data and as the analog signal. In the magnetic data reading device, when data is read from the magnetic card, the analog signal is detected. Discrimination of truth or falsehood of the magnetic card is performed in accordance with whether information about write-in errors in the analog signal is equal to the read waveform of the magnetic data.;COPYRIGHT: (C)2009,JPO&INPIT