Aug 31, 2007

More Security Stuff: Combination Padlocks (Lockpicking)



So, if any of you remember my lockpicking/security post a while back:
http://punchkickchoke.blogspot.com/2007/07/are-your-belongings-safe-behind-lock.html
You would know that lockpicking is a recent hobby of mine.

Today, we will be discussing a slightly more pertinent side of lockpicking to those of you who read this blog: padlocks. Why padlocks? What do you use to lock up your stuff in your gym? There's your answer.

So, some of you may have seen designs for proper padlock shim, with the 1"x 3" strip with the 'M' shape cut into it. Simple enough, but it took too long for me IMHO, and I could never get the freaking M shape down consistently.

So I decided I would make a "better homemade padlock shim." Better not in terms of the basic principles behind it, but in terms of make, use, and repeatability.

Honestly, I'm sure someone has thought of this before, but I haven't seen another variety yet. So take a look.



Advantages: Extremely easy to make, and the spike portion is easier to design/cut.

Also, can make more with 1 soda/beer can than traditional, because it's 1/2 the size; which is imporant because shims can generally only be used once, so if you fuck up the first time, you can just try again and again.

Disadvantages: Need needlenose pliers, due to lack of structural integrity around tail portion.(although you can use pliers to help regardless of design)

For me-
Making traditional shim with full can sheet- 1-2 minutes
Making my shim with full can sheet- 20-30 seconds

Success rate on basic Master padlock:
Traditional- ~30%, usually due to ripping of oft-too wide spike
Mine- ~80%

Disclaimers:
It's extremely difficult to shim any Master padlock past their level 2s, though most of you will never see a Master lock that secure in your everyday lives.

If the shim starts to rip heavily around the lock opening, discard and try again. Use those pliers gently.

This is for educational purposes only- I do not encourage you to go out any break into other people's lockers.
So, what can you get from this post?
BUY A DECENT PADLOCK. How can you tell?
1st check
: Does it use a ball bearing lock? Good.
2nd check: Make a shim and try to fit it in the opening. Doesn't fit? Good.

And go back to my old post of the video of picking their key padlocks in about 3 seconds:
-y

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