Radio frequency identification (RFID) tag and method of updating key of RFID tag

摘要

In relation to a security function of a radio frequency identification (RFID) tag, an RFID tag and a method of updating a key of the RFID tag that may manage a key to be used for an access to a reader by storing the key in a memory having a duplex structure, thereby minimizing an update error occurring during a process of updating the key are provided.

主权项

1. A radio frequency identification (RFID) tag comprising:
a first memory to record a first key to be used for an access to an RFID reader; a second memory, distinct from the first memory, to record a second key transmitted from the accessed RFID reader; an inspector to generate a check value inspected in relation to the second key, in response to an input of a check value from the RFID reader; and a processor to determine the second key to be a key to be used for the access to the RFID reader, when the generated check value corresponds to the input check value; wherein the processor maintains use of the first key as the key to be used for the access to the RFID reader and invalidates the second key in the second memory, when a reset occurs while the second key is being recorded in the second memory, or when the check value is not input from the RFID reader within a predetermined time after the second key is recorded in the second memory.