MIM attacks are unknown parties in a communication who relay information back and forth, giving the simultaneous appearance of being the other party. Radio Frequency Identification (RFID) is particularly susceptible to MIM attacks because of its small size and low price. Most RFID technologies talk to any reader close enough to read the signal. There is no user interaction in reading the tag and no authentication of the reader takes place. Consequently, you can walk up to someone with an RFID tag and a reader tuned to the frequency of their tag and read or interact with their tag without he or she knowing, while replaying or emulating the tag to the reader at the same time.
