Abstract

oncerns about information security have increased with the growth of computer and network used in society. The display image of a PC can be reconstructed from the power line network. In this paper, we have investigated the leaking principle of display image and the propagation characteristic on the power line. Firstly, the neareld coupling model from the RGB (red, green, and blue) signals of display image to the power line is proposed. And then, a multi-conductor transmission model for the RGB signals which transmit in the power line is proposed. In addition, the maximum safe distance is estimated by using this model. In order to check the validity of the estimating distance, the eavesdropping experiment is conducted. The results demonstrate that the display image can also be retrieved when the distance is 36m away from the PC. Therefore, the power line network can cause a serious leakage of the display image.

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