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Re: Jamming WiFi tracking beacons
From: Rikairchy <blakcshadow () gmail com>
Date: Thu, 17 Jul 2014 22:56:20 -0400

I'm thinking of picking up a few Raspberry Pis, I was wondering if they
could be used as a way to track devices that search for wifi (unless this
is passive only), and recognise "friendly" devices while notifying an
administrator of foreign devices detected. Could this have any real world
application?
On Jul 17, 2014 7:37 PM, "Eric Rand" <eric.rand () brownhatsecurity com> wrote:

There's a project on github for just that kind of thing:

https://github.com/DanMcInerney/wifijammer

Regardless of the hardware you choose to use, however, keep in mind that
you're going to be using a much higher fraction of the radio amplifier
in the wifi adapter's time than normal use, so there will be
proportionally greater power consumption.

(Radio theory isn't really infosec, but is a design consideration for
something like this; I can talk about it out-of-band if you need to know)

On 07/16/2014 02:26 AM, Keira Cran wrote:
Hey,

It's great that companies like Apple recognising the threat of tracking
people via their devices wifi cards' MAC addresses, by randomising them.

Naturally, I wondered i it was possible to jam the measurement beacon by
spoofing tons of wifi clients.  At one point in London, there was an
advertising firm with tracking bins [1] and I have a nice clip of a
technician looking puzzled at one beacon trying to figure out what's
wrong. (Unfortunately, it's bit too close to home (literally) to share.)
In the US I believe some ad "analytics" firms like SenseNetworks do
something similar. [2]

Consider this a call to arms then, to put those unused raspberry pies
you have lying around to good use.

best,
keira

[1]

http://www.theguardian.com/world/2013/aug/12/city-london-corporation-spy-bins
[2] http://sensenetworks.com/


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