Evaluating the Information Content of the Computer Monitor Radio Frequency Radiation Using a Simple Technique

-This paper sets up to discuss methods and techniques for evaluating the feasibility of a remote reconstruction of the image on a target computer monitor by demodulating its radio frequency (RF) radiation. A simple technique is proposed, based on an RF narrowband demodulation scan and synchronous FFT analysis of the demodulated baseband signal. A distinctive FFT signature of the frequency components around the nominal value of the horizontal pixel refreshment frequency of the target monitor may be taken as an indication of a security risk. The paper summarizes preliminary experimental results obtained with the proposed method.