Systems and methods for verifying the identities of RFID tags are provided. An RFID reader is configured to transmit an interrogation sequence to an RFID tag and recover digital information stored on the tag from an RFID response signal. A verification module is configured to extract a plurality of characteristics of the RFID response signal associated with Technically Uncontrollable RFID Features (TURF) of the RFID tag, and verify the identity of the RFID tag according to these characteristics.