Might I suggest that those interested in eavesdropping on Logitech wireless
keyboard users take a look at the following page:

http://www.logitech.com/cf/support/1032.cfm

One can glean quite a bit of information from that FAQ. If other people's
mice and keyboards can so easily interfere with other wireless keyboards,
 then that would seem to imply that there are a rather limited number of
channels available to such devices. So although I haven't tried, it doesn't
look like it would be all that difficult to intercept signals from Logitech's
devices.

If I were to attempt keystroke interception I guess I would do the following:

1. Attach a Logitech receiver to a computer (a laptop perhaps), on which
a keystroke logging program is installed.
2. Move within range of the keyboard you want to listen to.
3. Press the connect button on the receiver. It will hunt for a keyboard
and find one.
4. If there are multiple wireless keyboard results in use, you'll need to
watch the keystrokes coming in and look at the user you want to spy on,
and figure out if your looking at the right person. If there is only one
wireless keyboard in use, your job is easy.
5. Record the activity and analyse later.

If you wanted to step up to the next level of professionalism, and you were
electronically inclined, you could pull apart two receivers and modify them
as follows...

On one, you have the signal output go into a FM transmitter (bug), rather
than to the PS/2 cord. The range of small FM bugs can be up to a mile -
running on very little power. (I just looked at my wireless mouse receiver
and noted that if pulled apart, and with a FM transmitter attached, the
resulting device would fit into a cigarette pack.) This is your listening
device.

On the other receiver, you have the signal input come from a FM receiver
(a plain old radio), rather than from the antenna or tuned circuit or whatever
is inside the wireless keyboard receiver. This would attach to a laptop
running a keystroke logger.

Imagine walking up to your target with the cigarette box receiver, the lid
of the pack open as if you were getting a cigarette out. You press the relocated
connect button, and watch the little green light which indicates a
connection. It lights up. Success. You close the lid, and drop the box in
a trash can within six feet of the target. You can now take your laptop
with modified radio receiver attached, up to a mile away and watch the target's
keystrokes.

Admittedly the second monitoring scenario requires someone with electronics
experience, and as such wouldn't be for everyone, but I'm certain that there
are more than a few of us on this list who can use a soldering iron. Also,
 you would probably never see the cigarette box bug again. This isn't a
problem if the information you are intercepting is worth more than the device
you just lost.

Comments or suggestions are encouraged.

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