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  • This is the lock picking lawyer, and what I have for you today is a master lock, dial speed, digital combination lock.

  • Now this lock is not my normal fair.

  • There's no keyhole, and it can't be picked in the traditional way.

  • But so many of you requested that I take a look at this that I picked a few of them up to see if there were any obvious flaws.

  • And I think there is one.

  • After taking one of these apart, I discovered that there's a way to disassemble the lock, open it and then reassemble it without any external signs of tampering, though there will certainly be signs on the inside.

  • If we take a look at this one, which I already tore apart, we can see the problem.

  • This circuit board, which controls the entire mechanism, is outside of the metal security barrier.

  • Once we have that circuit board exposed, we should be able to bypass the mechanism with an external battery.

  • So let's test out my theory.

  • You can see this one is currently locked, so let's start taking this one apart.

  • We start by prying this plastic vessel out, and that could be done without any signs of destruction.

  • Then we can pry this piece out, and it's actually connected underneath with a little bit of rubber.

  • You can see that stretching out there.

  • So what I'm going to do is take the knife and cut that rubber.

  • That's going to be the main sign that this has been tampered with.

  • Once we cut that apart, we can see that the circuit board is exposed.

  • What we're going to be going for are these two leads right here.

  • We look at the other side you can see attached to them are the wires that go to the motor.

  • Unfortunately, they're covered by this plastic barrier, so we're going to have to pierce through that.

  • The way I decided to do that was to attach a battery to these probes that I usually use on a multi meter that have relatively sharp tips.

  • So we should be able to get power to those two pads.

  • Let's see if we can do that now and just that quickly.

  • We got it open, but that's really only half of what we set out to do.

  • We actually need to reassemble this and make it look like it was never opened, so it has re locked itself automatically.

  • We can put this back into place.

  • There we go and snap this cover back on and it looks like it still works perfectly.

  • So I'm not sure this is a practical attack in the real world, but it's certainly a design vulnerability that could have easily been avoided.

  • In any case, that's all I have for you today.

  • If you do have any questions or comments about this, please put them below.

  • If you like this video and would like to see more like it, please subscribe.

  • And, as always, have a nice day.

  • Thank you.

This is the lock picking lawyer, and what I have for you today is a master lock, dial speed, digital combination lock.

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863】欠陥のあるデザイン。マスターロック「ダイヤルスピード」デジタルコンビネーションロック ([863] Flawed Design: Master Lock “dialSpeed” Digital Combination Lock)

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    林宜悉 に公開 2021 年 01 月 14 日
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