Analogue Fingerprinting for Passive RFID Tags

Traditionally, modern RFID technology has always been assumed to be reliable, but as technology has advanced, so has the ability to replicate the signals that an RFID tag emits upon being interrogated. This paper presents a method of identifying the authenticity of an RFID tag by means of creating an intentional fingerprint. To achieve this we propose an addition to the modern RFID tag in the form of an analogue circuit. The circuit would perform some arbitrary, predefined, mathematical function on an analogue signal of arbitrary length. The aim of this paper is to provide a solution to prevent fraud and forgery of RFID tags.