[scottLobster]

Cool spooky concept, but seems like this could be easily foiled by shoving some aluminum foil into one's pockets or wearing thermal clothing in the winter. Or moving furniture around.

My cheapo Amazon desk is steel framed, and the monitors have all sorts of metal and signals running through them. I know it impacts wifi because my wifi-connected printer gets crappy signal on one side and decent signal on the other. Good luck getting a positive ID via wifi when I'm sitting at it.

Likewise I don't see how this survives in the real world for a mass surveillance application. Any "signature" will be in constant flux as environments change, in terms of everything from crowds to weather. I'll need to see a demo outside of a controlled environment before I start trying to obfuscate my signature or remodel my house to run Ethernet everywhere.