h a l f b a k e r y
Tip your server.
idea:
add, search, annotate, link, view, overview, recent, by name, best, random
meta:
news, help, about, links, report a problem
account:
Browse anonymously,
or get an account
and write.
Login
Create account.
|
|
|
Please log in.
If you're not logged in,
you can see what this page
looks like, but you will
not be able to add anything.
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
Annotation:
|
| |
The bandwidth would be very low .... and the interference massive. But a code spreading technique might just work. |
|
| |
Just use ethernet-over-mains - you could get full bandwidth motion video. |
|
| |
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. |
|
| |