[vanEck85] W. van Eck, Electromagnetic Radiation from Video Display Units: An Eavesdropping Risk?", Computers and Security, 4:269-286, 1985. [This paper demonstrates how $200 worth of off-the-shelf electronics can be used to observe video display terminals from a distance and details experimental results using this technique. A realistic system of this sort can now be assembled from components for about $1,000.]
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