  RFID as an important component technology of IoT faces important security
risks while being rapidly applied, among which the discovery of unauthorized
readers in space is crucial. There are some researches proposed the
unauthorized reader detection algorithm based on commercial off the shell(COTS)
devices, but these detection algorithms are often easily affected by moving
objects blocking interference in space, causing false alarms. We propose a new
method of eliminating moving object interference, which can reduce the system
false alarm rate to less than 7.9% by experimental testing
