Air Defense says that their distributed monitoring system will, with the proper map
input for the area, be able to tell you the location of a specific AP or client. I
have not see it demonstrated, yet, though. Your problem goes beyond simple
triangulation of a signal - I expect that you'll want to do this during normal
activity times, when you will likely have several (at a minimum) legitimate users
working. With simple signal source triangulation, you listen to the signal strength
and direction from several known locations and plot the location of the target on a
map. But, during normal usage time, you have to sort out the specific user that you
want to locate from the signals of all the other users that you are not concerned
about - not as easy of a task as it might seem.
For an idea of a jammer, see the Phrack article about building your own GPS jammer -
it should get you started. Remember, however, that jamming may not be legal, and is
certainly a double-edged sword - both for unwanted and unintended interference that
can be caused in areas that you don't want it in and for unintentional
lack-of-coverage areas that may escape you.
Good luck,
David
>>> [EMAIL PROTECTED] 08/01/03 02:04AM >>>
hi folks,
i have an interesting problem to solve....
i am studying in univ and my dept has it's own block in the univ. the area is roughly
around 300 sq mts. u ppl know of any techniques to determine the location of the
mobile user... maybe accurately to about which room/lab the mobile user is in using
ad-hoc technique. i am wondering if such a thing is possible in first place. some sort
of research (Eg RADAR technique) is done to find an avg soln to the above problem; but
those are for non-adhoc types (i.e with the help of access points and signal
strengths)... any help in this direction would be greatly appreciated....
and one more thing is to do with the security issues..... let me give u an example...
suppose we do not want anyone to snoop our signal just outside our premises here in
IBM, we were planning to do a bit of research in building a JAMMER. yes, u heard it
right... a jammer to jam RF signals outside our premises. I am aware of such jammers
for GSM phones; but not for WiFi. What would be a possible technology (in terms of
PHY) to use to build such a jammer. Please let me know if you people have any pointers
for this.
thanks in advance,
kiran
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