Rfid
Origin of RFID tags Leon Theremin is thought to be the first user or inventor of this device as the inevitable part of spy-kit for the Russian Government in 1945. This cannot be a reliable story: the tool invented by Theremin was a passive covert listening device and not an identification tag. The technology applied in RFID has actually been since the early 1920s. The IFF transponder, a much more relevant technology, developed in 1939 and the British utilised it during the Second World War