[1337] My New & Improved Robotic Safe-Cracker…

[Showsni]

It took 20 hours, and we opened the lock. Now let's do that again to show it wasn't a fluke...

[sunyuchieh]

Me: 11 minute video! The lock must be great!
LPL: Brute force guessing

[vatra]

I love how LPL's longest video is also the only video where he does nothing.

[JunkyardDigs]

Surprised the the lock can take 3 days of rotation without burning up!

[johnf.kennedy]

I don’t know how you manage to get so many people, myself included, to watch you pick locks almost every day. Not complaining, it’s truly fascinating to see your raw skill.

[YszapHun]

I love how the "robotic cracker" became the 1337th episode.

[ThatLazenbyGuy]

When he says people wanted to see the robot run for longer I thought "who would want to watch a robot run for 9 minutes?" I then proceeded to enjoy watching a robot run for 9 minutes.

[pedroakjr]

The noise is the robot saying "nothing on one" two is set" "3 is binding" in robotic language

[ChessedGamon]

This looks like a device I'd see a movie and would complain about for being too plot convenient

[Nicht_Dani]

LPL: This is a high qualiy lock.

Also LPL: Unlocks it without being in the same room as the lock.

[G.A.N.]

Wideo nr [1337] deserved something as cool as this is!

[TedHubble]

For those wondering how it knows when it hits the right combination: After the last digit is correctly guessed, the dial will only turn back so far before it stops spinning. The robot monitors how much resistance there is and when it's suddenly prevented from spinning the dial, it knows it hit the right combination.

If you go to 10:50 and watch in 0.25x speed you can see what's going on pretty clearly. As the middle gold disk turns clockwise, this is the robot entering the next digit (notice it spins a bit further each time), and at the end of each clockwise movement you'll see the outside ring with the gate in it move one more tick. It then goes counter-clockwise back to the previous position before trying the next digit. However when all digits have been entered correctly and the gates are all aligned, and the dial starts to turn counter-clockwise again, it allows the hook to fall into place (the loud click in the video) and stop the dial from turning back to the previous position.

Since I'm this far, I'll include how the hook & rest of the physical lock works: If you look at the top right of the hook there's the white indent looking bit, that's a piece that's deeper than the rest of the hook that needs all 3 gates aligned so that the hook can move to the left and catch on the cut out bit of the gold ring (when the gates aren't aligned, that bit is just resting against the outside of the 3 rings). At that point, as you(/the robot) continues to spin the dial counter-clockwise it pulls the hook up, including the gold deadbolt looking piece that the hook is attached to. That deadbolt bit is what's physically blocking the silver cylinder at the bottom, which is connected to the bolts keeping the door closed. You can see at 10:56 when he retracts the bolts that the cylinder goes where the deadbolt originally was.

This is why when you close a safe after you lock the bolts (normally turn the handle back to the closed position, if you're using the safe normally) you need to spin the dial to properly lock it. It pushes the hook out, which moves the deadbolt back down, and spins the gates so they aren't aligned anymore.

[stapuft]

100% worthy of being episode 1337, as this this is VERY 1337.

[myrmidon]

I love that you picked 1337 for the super high-tech video.

[PewPew]

He's the only one that can make us watch a spinning robot arm for 11 minutes

[Bahamuttone]

Hmm I would guess that a simple way in countering this attack is adding a disc with a centrifugal detent.
On normal operation one does not spin the dial that fast.

[ShawnWebb]

Does the machine need to worry about friction-induced heat? What about wear on the locking mechanism?

[GATOtyger]

It's the first time that "looks like WE got this open" makes sense. Up until now, he was the only one opening the locks. Now they are two and BOTH are machines.

[meateaw]

I reckon you could speed up the algorithm by skipping the "long distance" numbers, its much faster doing "close by" numbers, so if you prioritise testing those combinations first you get through a larger portion of your testing regime sooner.

[prodestrian]

This video is just long enough that the final "click" at the end was super satisfying. Anyone who's ever successfully run a password brute force tool knows how good this feels, when it finally finishes! 😅