On Wed, 12 Mar 2003, Thomas Shaddack wrote: > I heard these ones have range up to 1.5 meters. And you need much less > power if you use a directional antenna (which can be part of some fixed > installation).
Easy to find the antenna then :-) > Wasn't aware about RF tags being magnetically coupled. Anyone other to > support/deny this? The 900MHz jobs are definitly EM. At 130kHz it's mostly magnetic. > Hadn't knew about mu metal. Thanks. :) Could be a nice thing for EM > shielding, especially of things like transformers. Helps keep monitors safe, but soon it won't matter because they'll all be TFT instead of tubes. > If it will proliferate, alternate uses spring up as natural byproduct. > Until then, the countermeasures are cool toys. Definitly cool toys :-) > Regarding TEMPEST shielding - there is another, complementary approach for > shielding: jamming. There are vendors selling devices that drown the RF > emissions of computer equipment in noise, so TEMPEST receivers get > nothing. Are there any publicly available specs of such generators, or > even building plans? Ensuring there is (or isn't) a transmitter is your best bet. After all, if you know there's a bug, you can send false info and know it's getting picked up :-) Patience, persistence, truth, Dr. mike
