+--------------------------------+ | HOW TO OPEN A PERMUTATION LOCK | +--------------------------------+ by unlock - 2009 This file here explains to you how you can open a permutation lock without knowing the right numbers code. This file is just written to show you the insecurity of this kind of lock. Which means you shouldnt buy such a lock because it is very insecure and every person with this knowledge can open it. With this technique you can open the lock without destroying it and without doing any harm to it. example ASCII picture of a permutation lock: .___. .___. .___. .----| |--| |--| |----. | [ 3 ] [ 6 ] [ 1 ] | |------------| b | | | | | --- c |-..----------| | a | [_4_] [_7_] [_2_] | || d | |------------[___________________________]-------------| a) - metal chain which is permanently connected to the lock b) - part where the 3 number discs are for the code c) - 3 discs for the number code d) - metal chain which you pull out with the right code (open it) So how do i open the permutation lock without knowing the code of numbers? This is very easy done - too easy and this is why this kind of protection is very weak. The industry should not build them anymore. Here we go: We take a) in our left hand and d) in our right hand in a way that we can still rotate the 3 discs with our other fingers left. Then we pull both sides of the chain ( a, d ) - we pull a) to the left with our left hand and d) we pull to the right with our right hand so that it is a bit harder to rotate the 3 discs. Then we take the first disc with our fingers and rotate it from 0 to 9 until we feel and hear a "clack" or "click". This tells us that we have found our first code number. The same we do with the 2 other discs left until finally the permutation lock opens. I did this already as a kid, 15 years back, on the permutation lock of my bicycle. But they still sell these insecure locks today and you can find them on many products which often costs lots of money. So dont buy such a lock and of course do not use this technique to steal stuff from others. Probably there are lots of more different kind of such locks which you can open with the same technique or in a bit different way - for example if it is not a chain lock but a normal lock for a locking bar and so on. [EOF]