Again: [hrdware] anti-Tempest video settings
It won't make any diifference to the potential attacker. His aim is to recover the text/shapes of what you are displaying. He is not generally concerned with the "niceness" of the display, but rather the contents. But of course. But what I want to know is: is there some combination of display colors that will be visible for the eye, but not for the Tempest equipment?
Also, many guns - red, blue, green actually do radiate on slightly different frequencies, allowing differentiation of signals - due to the slightly different physical geometry of the guns themselves.
That might answer it. I suppose that if some "stealth" settings exists, they are highly hardware dependent. My question was not "would it work in all instances?" but rather "had this tactic been implemented successfully in *some* instances?" Or, to the contrary, is it reasonable to assume that modern Tempest equipment can work around theses impediments almost all of the time, therefore making any attempts at this futile? Regards JFA PGP key ID# C58ADD0D at: http://w3.citenet.net/users/jf_avon Key Fingerprint: 529645E8205A8A5E F87CC86FAEFEF891 Unsollicited commercial e-mail will be proofread at US165 $/h Any sender of such material will be considered as to have ac- cepted the above mentionned terms.
Or, to the contrary, is it reasonable to assume that modern Tempest equipment can work around theses impediments almost all of the time, therefore making any attempts at this futile?
Regards
Make a grey-scale cable by merging the RGB lines (AND the RGB return lines). Do not use a standard grey scale cable, these are typically intensity on green, which you do not want. Connect the cable and start playing with your colour scheme. The effect you want to achieve is one where all colours have the same intensity. When that happens your whole screen should be the a uniform grey area. Revert to the regular cable and save your palette configuration. I imagine this would be effective against all of the middle range van-eck monitoring equipment. It will not be effective against equipment that looks for phase distortion and signatures in an attempt to discriminate against the three signals. Equipment capable of the latter would be extremely complicated and expensive to design and produce; I suspect there has been no call for it to date, given that if you are dealing with a target who understands the risks of van-eck they usually have shielding and or a faraday cage. -- "Of all tyrannies a tyranny sincerely exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies, The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for own good will torment us without end, for they do so with the approval of their own conscience." - C.S. Lewis, _God in the Dock_ +---------------------+--------------------+----------------------------------+ |Julian Assange RSO | PO Box 2031 BARKER | Secret Analytic Guy Union | |proff@suburbia.net | VIC 3122 AUSTRALIA | finger for PGP key hash ID = | |proff@gnu.ai.mit.edu | FAX +61-3-98199066 | 0619737CCC143F6DEA73E27378933690 | +---------------------+--------------------+----------------------------------+
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Jean-Francois Avon -
Julian Assange