RF TAG ISSUING DEVICE, RF TAG UTILIZING DEVICE, METHOD FOR UTILIZING RF TAG, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To prevent the forgery of an RF tag by enhancing the safety of UID stored in the RF tag.

SOLUTION: The UID inputting part 10g of an RF tag issuing device 10 accepts the input of UID to be stored in a non-contact type radio frequency tag 50. The inputted UID is converted into encrypted UID (E(KIi, UIDj)) by an encrypting part 10h. This encrypted UID (E(KIi, UIDj)) is written in the non-contact type radio frequency tag 50 by a UID writing part 10i. The radio frequency tag 50 in which the encrypted UID (E(KIi, UIDj)) is written in this way is distributed to a user. The encrypted UID (E(KIi, UIDj)) stored in the radio frequency tag 50 is decoded by an RF tag using device which the user uses.

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