It is a well known fact that electrical devices and, in this case, specifically computers generate electromagnetic radiation which causes the device to interfere with radio reception. Tempest-AM generates AM radio signal on your monitor in the form of patterns. This pattern causes high resolution monitors to transmit the AM signal. This signal can be picked up by simple handheld radio from a distance. Tempest-AM can be set to transmit on any carrier, but not on high frequencies like FM. Tempest-AM is not a useful utility but merely an example for anyone who is interested in Tempest and is able to test the program.
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