tag and anti-counterfeit labels and counterfeit-proof problem itself is forged, counterfeit prevention measures in high-priced goods be taken, measures are necessary in this complex procedure, this identification is not easy, and a problem that it is difficult to use. By preventing counterfeit of the IC tag 1 and the combination of anti-counterfeit identification unit (2) of the counterfeit-proof systems, the identification is performed using a wireless communication system, the higher the reliability of the identification, and to ensure a feeling of real imitation is possible. In the IC tag 1, and the antenna 15 for receiving a radio wave, the received radio wave and the power generation circuit (16) for power generation by rectifying Here, the memory EEPROM (13) and, RF driver (11), RF reception The circuit 12 was provided. The identification device (2), and the RF driver (25) for supplying the radio wave, and the RF receiving circuit 26 for receiving the radio output, EEPROM for storing the data 24 and the data stored in the EEPROM (24) and a CPU (20) for comparing the received information received by the RF reception circuit 26, and a liquid crystal display unit 22 to display the comparison result from the CPU (20).
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