I give it a week before someone creates a lego mindstorm / arduino device with suction cups that performs the entire sequence in much less than 20min.
Some electric door locks (like the Codoor CD3500 [1] used at a place I used to work) are designed so after a certain number of digits without a valid code (16 for the codoor), they require the correct code to be entered twice in succession in order to unlock.<p>This is transparent to the user - it's just as if you hit a wrong button - but prevents using codes like this.<p>I don't know if this is common to all keyless entry systems, but you'd hope it would be!<p>Of course you can still enter every every code, just it would take 80,000 button presses on a 10-digit lock.<p>[1] <a href="http://www.assar.ee/cgi-bin/document.cgi?doc=356" rel="nofollow">http://www.assar.ee/cgi-bin/document.cgi?doc=356</a> see page 12 'access blocking'
Neat analysis. Do keyless entry cars not have some kind of "too many presses" sensor that would slow this process down or render it impossible by making you start over? I don't know, I'm just asking.