a system and method for securing a radio frequency transaction using a rf identification device transaction device is provided . rfid transaction device includes a transactions counter for tallying the number of transactions attempted or completed with the rfid transactions device . counter value is used to create a rfid device authentication tag for use in validating the rfid device . a rfid reader , interacting with the rfid device , provides a random number to the rfid device which may be used in the rfid device authentication tag creation and validation . rfid reader may also use counter value and random number to create a rfid reader authentication key useful for validating rfid reader . rfid transaction device may include an encryption key for creating rfid transaction device authentication tag . likewise , rfid reader may include a rfid reader encryption key for creating rfid reader authentication tag .