Protection against TEMPEST?
hi, I came across this link through this months Cryptogram. http://oculislabs.com/Products/ChameleonP.htm The link reads.... "Oculis Labsb Chameleon System protects your monitor against eavesdropping. With Chameleon running, you can read your screen normally, but no one else can. Chameleon protects against the shoulder-surfing eavesdropper as well as opponents using sophisticated TEMPESTbtype electronic surveillance." I am curious to know how it prevents TEMPEST? Other links http://oculislabs.com/government.htm Whitepaper http://oculislabs.com/Oculis_Whitepaper_1.pdf Also, is not clear the idea of you seeing something at one gazepoint and some other thing at another gazepoint. Any insight is welcome. Thank you, Sarad AV
On Wed, Jul 15, 2009 at 7:16 AM, Sarad AV<jtrjtrjtr2001@yahoo.com> wrote:
hi,
I came across this link through this months Cryptogram. http://oculislabs.com/Products/ChameleonP.htm ... it prevents TEMPEST?
display emanations are just a small subset of emsec interest, particularly in a networked environment. in any case, display obfuscation based on gaze / focal tracking can be defeated with additional effort. (will it cost more to attack? yes. is this cost reasonable, maybe - depends on threat model, etc, etc.) there are similar techniques based on altering the font rendering behavior on LCD displays and various types of hardware / software setups... best regards,
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Sarad AV