A study on the recognizability of information from computer in the electromagnetic leakage

There are very complex circuits and various clock signals in a computer. Every component can radiate electromagnetic waves when it works. Some of these radiations may result in computer information leakage. The technology for recognising information leakage caused by video signal electromagnetic radiation is presented, and the primary word image is obtained. So as to get intact useful information from the video signal concealed in the electromagnetic leakage, a pattern recognition method based on an artificial neural network is proposed. Lastly, the primary word image, recovered from the electromagnetic leakage, is recognized and reconstructed. The recognizability of the information leakage from a computer is discussed.