RFID tag device and method of recognizing the same

摘要

Provided is a radio frequency identification (RFID) tag device. The RFID tag device includes memory which stores ID information and a second count value, and a certification unit which performs a certification process according to a keyed hash value received from the outside and a result of a comparison between first and second count values received from the outside, and adjusts the second count value.

主权项

1. A radio frequency identification (RFID) tag device comprising:
a reception unit configured to receive an input message comprising a keyed hash value and a first count value from the outside; a memory configured to store identification (ID) information and a second count value; a certification unit configured to perform a certification process according to the keyed hash value received from the outside and a result of a comparison between the first and second count values, and adjust the second count value; a keyed hash value generation unit configured to calculate a keyed hash value by using the adjusted second count value and the ID information; and a transmission unit configured to transmit a response message by outputting the calculated keyed hash value and the adjusted second count value, wherein the keyed hash value calculates a certification key value according to the first count value and the ID information, and generates the keyed hash value by using the certification key value, and the certification unit comprises a keyed hash value comparator configured to compare the keyed hash value generated by using the certification key value and the keyed hash value received from the outside.