This Calculator Will Help You to Crack Any Basic Combination Lock in 8 Attempts
Forgot your Master Lock combo? Or do you need some incentive not to use the Master’s lock? There is a website for that.
The video above from Sami Kamara shows how you can pick any Master’s combination lock in eight tries. It’s a bit long, but here’s an explanation from Ars Technica if you don’t want to watch the video:
Operation consists of lifting the locked shackle with one hand, while turning the dial combination counterclockwise, starting at 0 with the other. Before the dial reaches 11, three dots will appear where the dial will no longer resist turning. One of them will be ignored, since it is exactly between the two integers on the dial. The other two locations are locked positions. The attacker then lifts the locked bow again, this time with less force, while turning the disc clockwise. At some point before completing a full revolution, the dial will resist turning. (The attacker can still turn through it, but will physically feel resistance.) This place is a place of resistance. The two blocked positions and one resistance position are then written to a web page that makes the exploit easier to deal with .
The page responds with the first digit of the combination and two possible digits as the last digit. By checking which of the possible last digits has the most concessions, an attacker can quickly determine which one is correct. By removing the false digit from the web form, the page will automatically fill in eight possible numbers for the second digit of the combination. Now that the attacker knows the first and last digits and knows that the second digit is one of eight possible numbers, cracking consists of simply testing every possible combination until the correct one opens the lock.
We’ve previously seen an illustrated guide to picking a master lock, but the online tool makes it much easier and requires a lot less trying.
Hack any master combo lock in 8 tries or less! | YouTube via Ars Technica