14 May '13, 1pm
Master lock auto-cracker built as coursework at University
We’ve talked about the ease with which these locks can be cracked. But [Ross] points out that the resources we linked to before are flawed . To get the combination as quickly as possible the team has implemented an algorithm discussed here . Their machine uses a stepper motor to turn the dial with a big solenoid to pull on the shackle. The system is sensitive enough to detect the “sticky” spots of the lock, which are then used to narrow the number of possible combinations before brute forcing the combination. As you can see in the video after the break, the shackle moves slightly when pulled after an incorrect combination. The long vertical pin near the solenoid will pass through an optical sensor when the correct combination is found.