Re: RF code scanners

[Mister Coffee <live4java () stormcenter net>]

On Wed, Jun 23, 2004 at 03:06:26PM -0400, Ng, Kenneth (US) wrote:
> Depends on how cheaply the unit was designed.  I remember putting in back to
> back diodes on the front gates to protect against stuff like static
> discharge.  If this was done, you would have to generate a HELL of a lot of
> EMF to blow these out. Time to bring out the van-de-graf generator :-).
> But in this era of cheaper cheaper cheaper, I bet these aren't there
> anymore.  What will probably happen is you'll DOS the box.  The AGC on the
> front end will try to cut the signal back as far as it can, probably not
> enough, the decoders won't see a clear signal/sequence, so will probably
> fail to engage.  But I wouldn't be surprised if you burned out a front end.
<<much snipping>>
>
I'm incluned to agree that a low end unit will probably scatter parts if you hit it with enough power.  Which, I 
suspect, would lead it to "fail closed", with the gate/door/what have you still locked.

As has been mentioned, simply jamming the thing would be a piece of cake.  In the context of a pen-test, you could 
probably combine a Remote Door DOS with a bit of social engineering to gain entrance to a prem, if it was within the 
scope of your test.

Cheers,
L4J