>It seems to me the only way the key fob is going to be able to be copied i=
s if someone
> presses one of the  buttons to transmit the signal.  If it is just sittin=
g on a table or
> hanging on a wall hook, how would  someone outside the home (or bldg.) ca=
use the
> key fob to transmit?  As far as I know, key fobs are not  receivers.  The=
y're only transmitters.
>  So unless I'm missing something, I think the whole idea of  copying the =
code from a key fob is a load of bull.=20
=20
No, it is not a lot of bull. If you need to insert a key into the steering =
column to drive the car, then it is probably not a problem, but where the p=
roblem starts is a lot of cars, especially high end ones (and these are the=
 ones that seem to be targeted), are keyless entry and keyless operation, y=
ou only need to have the fob in your pocket. This implies that the fob has =
some sort of receive and respond mechanism so that when you walk up to the =
car it unlocks without you touching the fob, and when you get in you push a=
 button and the car starts - again without you touching anything on the fob=
..

So the guys in the article I posted the link to have some form of transmitt=
er and receiver plugged into the laptop that sends a standard request as th=
ough it comes from the car, and the fob in the house responds with the answ=
er to the challenge. It doesn't matter that there is a fancy rolling code, =
the laptop is powerful enough to generate this on the fly from whatever it =
gets back from the fob. An 'unlock' request is then generated by the laptop=
, the thieve climbs into the car and drives away with the laptop emulating =
the left behind key. Thieves take vehicle to a lockup where they substitute=
 the valid key codes for a new set of keys, ship vehicle out of country and=
 make lots of money.



--=20
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