Name: [863] Flawed Design: Master Lock “dialSpeed” Digital Combination Lock
Uploaded: 2020-03-30T06:08:17.000Z
Duration: 3 min 18 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

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

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.

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.

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.

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.

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.

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