emr.pdf

"electromagnetic radiation: an eavesdropping risk?"

one technical article on the phenomenon of reading and reconstructing screen images from the radiation emitted by CRTs. 

see also the funny geekware for linux known as "tempest for eliza". this allows music to be played via the computer screen, which can then be picked up via AM radio:

http://www.erikyyy.de/tempest



----note: files 'eavesadrop' and 'eavesdrop1' are unsuccessful upload attempts of the same file. seems the Linux hotline client [fidelo] isn't quite there yet... :-)