On Mon, Feb 15, 2010 at 11:24 PM, Thomas Shaddac=
k
<=
tsc..._at_shaddack.mauriceward.com> wrote:
Isolation is too difficult. =
What about injecting noise instead, mimicking
the signatures we want to =
suppress? Making it look like said aircon runs
24/7?
That'd however work in case of EM signatures. (Could also =
drown e.g.
parasitic signals from a computer in added noise.) The signat=
ure of the
additional load of the aircon as it cycles on/off will stay t=
here; the
only way to suppress that is using a UPS, and cover part of the load frombatteries (and recharge them later). In combination with a local
solar=
/wind generator it could even save money, in addition to increased
priva=
cy.
Speaking about signatures, what about INTENTIONALLY creating them in th=
e
equipment? The "Tempest Fur Elize" program allowed playing m=
usic on a
radio receiver by varying horizontal bars on a CRT monitor or =
even a
laptop. Demo here:
http://www.youtube.com/watch?v=F-O1QWWmVmg
<=
a href="http://www.youtube.com/watch?v=rm6AELkCnJY" target="_blank">h=
ttp://www.youtube.com/watch?v=rm6AELkCnJY
Run a program on a computer (or a pattern of packets through a router,<=
br>perhaps no activity vs packet flood?) that creates a signature easilyrecognizable on your equipment (melody for acoustic output, pattern of
peaks on a spectrum analyzer...) and then use that to examine the behavior<=
br>of the signals in your power network. A signal of known parameters can b=
e
even fished out from below noise floor, increasing sensitivity of
detection.
There are many options. You can write your own custom pro=
gram. You can use
the Tempest Fur Elize one. Or, for using the computer =
memory bus to
generate signal, use MemTest86, memory tester that loops t=
hrough all the
address space and does nothing but read/write patterns - likely an easy to<=
br>observe regular activity.
> I do not know anything abo=
ut TCP/IP information
> leakage into the power grid, but the whole
> "Smart Grid" business assumes being able, in
> the lon=
g term anyway, to read whether your air
> conditioner is running full=
when you are not at
> home, say. This is not hard in the technica=
l
> sense, but for the person who does not want to
> be surveilled i=
n this way, it is time to look
> into motor/generator isolation. T=
he narrow
> technical question of the moment might be whether
>=
a router's power signatures (as filtered off
> the AC line) are proportional to TCP/IP activity.
>
> I kn=
ow nothing of what is happening, only what
> is possible.
>
=
> --dan
>
>
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