There has been quite a bit of concern about certain people (agencies) using a TEMPEST machine and invading privacy. Most of the things to defeat this that have been taked about have revolved around shielding. What would be the problem with having another device to emit random signals on the same frequency that your monitor operates on? Has this already been implimented? Legal? jon <jjaloszyns@bluejay.mich.fred.org> ------------- 43.31.28N, 84.41.41W Jon Jaloszynski Student 9-12 at Shepherd HS, Shepherd Shepherd, MI
It should be possible to jam your own emissions, but that same noise might cause be picked up by your own equipment as well and cause errors. Also remember that most of these signals are detected by correlation, which detects a signal even with a very high S/N ratio. So it's not obvious just how to jam. My first guess is to phase-lock onto your own emmissions and then broadcast random bits at higher strength. With E/M monitoring, just like cryptography, you don't really know how to make defenses unless you know how to attack. Eric
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Eric Hughes -
jjaloszyns＠bluejay.mich.fred.org