The aim of this paper is to answer the question: „Can RFID traffic be sniffed with the purpose of storing and later reproducing, to gain false access to a particular system?“ The paper describes the process of radio frequency identification (RFID) and defines radio communication system, with which we are trying to record and reproduce RFID traffic, called SDR (Software Defined Radio). Developed programs and used tools were first tested on a simpler radio device, remote control of garage doors. Its one-way communication with the garage door engine is a good example and introduction to the usage of developed programs for sniffing, storing and reproducing information generated by the communication of RFID system. The first two chapters are of theoretical type and give a good insight into the technology used in the process of collecting and reproducing radio content. The first chapter describes the work of RFID technology, whose communication we are trying to record and reproduce. Its key components and architecture are described, and the answer to the question on the safety of using such wireless radio technologies is given. In the second chapter, a program-defined radio device (SDR) is being defined, a radio communication system with which we are trying to record and reproduce traffic generated by the RFID system. We are considering its hardware and software component. In this chapter, a program-defined radio device called "HackRF One" is described in more detail. Also, a comparison of a modern digital program-defined radio receiver and its predecessor, an analogue radio receiver, is made. The third chapter, made in a form of a manual describes the procedures of using ready-made tools (GNU Radio, Osmocom FFT and Inspectrum) and the procedures for developing programs intended to collect and reproduce radio content.