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on the possible chance the numerous
sides of law enforcement have a use for
better surveilliance I thought that a
recording device that sent out pulses of
data as variations on the pervasive ac
current hum would be much less
detectable
although I have minimal knowledge of
such things
it feels as if any attempt to
detect radio transmission would screen
out this frequency as a result of all the
appliances that have circuits radiating
energy at typical ac frequency
a utility frequency location transmitter
would seem
undetectable unless you knew it was
going to give off primes at a precise but
rarish nterval
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Annotation:
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The bandwidth would be very low .... and the interference massive. But a code spreading technique might just work. |
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Just use ethernet-over-mains - you could get full bandwidth motion video. |
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The surveillance groups of the world can already reverse engineer the interference on your AC electricity to figure out what you have been seeing on your computer. Presumably it's a very small step from there to spotting your encrypted signal. so I doubt you'll be deterring anything but casual surveillance. |
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