WIRELESS IC DEVICE SYSTEM AND METHOD OF DETERMINING AUTHENTICITY OF WIRELESS IC DEVICE
First Claim
1. A wireless IC device system comprising:
- a wireless IC device for an RFID tag; and
an interrogator arranged to communicate with the wireless IC device;
whereinthe interrogator includes a circuit arranged to randomly select a frequency at which communication is to be performed from a frequency band of the wireless IC device in which communication is possible to communicate with the wireless IC device, and arranged to perform authenticity determination of the wireless IC device by determining whether or not communication is possible at the frequency selected by the interrogator.
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Accused Products
Abstract
An accessory device to be mounted on a main device is provided with a wireless IC device. The main device is provided with a reader/writer that is an interrogator that communicates with the wireless IC device of the accessory device. When the accessory device is mounted on or about to be mounted on the main device, the reader/writer selects two or more frequencies in a frequency band in which an authentic wireless IC device can communicate to perform communication with the wireless IC device. With this configuration, even if the identification code written in an RFID tag is read and the RFID tag is duplicated, the duplicated RFID tag can be accurately and effectively determined as being counterfeit.
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Citations
9 Claims
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1. A wireless IC device system comprising:
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a wireless IC device for an RFID tag; and an interrogator arranged to communicate with the wireless IC device;
whereinthe interrogator includes a circuit arranged to randomly select a frequency at which communication is to be performed from a frequency band of the wireless IC device in which communication is possible to communicate with the wireless IC device, and arranged to perform authenticity determination of the wireless IC device by determining whether or not communication is possible at the frequency selected by the interrogator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of determining an authenticity of a wireless IC device in a wireless IC device including a wireless IC device for an RFID tag and an interrogator that communicates with the wireless IC device, the method comprising the steps of:
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randomly selecting using the interrogator a frequency at which communication is to be performed from a frequency band of the wireless IC device in which communication is possible to communicate with the wireless IC device; and performing authenticity determination of the wireless IC device by determining whether or not communication is possible at the frequency selected in the selecting step. - View Dependent Claims (8, 9)
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Specification