re tempest in article apr lynx dac northeastern edu angel foghorn leghorn coe northeastern edu kirill shklovsky writes in article apr infodev cam ac uk rja cl cam ac uk ross anderson writes i m afraid this doesn t work either we can pick up laptop screens without any problem most of the so called low radiation monitors are also useless the description turns out to a marketing assertion rather than an engineering one we thought there might be a market for a monitor which was not as hugely expensive as the military tempest kit but which was well enough shielded to stop eavesdropping using available receivers we built a prototype it works and it s still sitting on my lab bench commercial interest was exactly zero in the absence of open standards a monitor which really is low radiation and costs dollars more can t compete against a monitor which just claims to be low radiation and whose only extra cost of production is the pretty blue sticker on the box ross i heard somewhere can t name the source that tempest does not necessarily pick up just crts but it can pick up emissions from almost any chip if that is true the kind monitor would not make any difference becuase everything on the screen can be picked up from the video controller can anybody verify or refute this just thought of something yes laptops can still be read but it s not quite as easy as a normal pc with a crt my thought airline pilots lately have been complaining about how laptops being used in flight mess with the plane s instruments if this can be hyped up manufacturers may start building laptops with even lower emmisions it would probably still be possible to pick up with surveillance equipment but at this point it would be a lot cheaper to mask the remaining signals with tempest techniques doug holland doug holland anyone who tries to take away my freedom holland cs colostate edu of speech will have to pry it from my pgp key available by e mail cold dead lips
