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		Karunamon on Feb 8, 2016 \| parent \| context \| favorite \| on: Department of Homeland Security Devices on SF Stre... There might be something to this if there was a protocol for delivering secure data over diffuse particulate matter...

avn2109 on Feb 9, 2016 [–]

Honestly, is there something stopping you from encoding a signal by modulating the airborne concentration of some particle? Maybe something that doesn't occur commonly - use e.g. helium instead of nitrogen or something like that.

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