You know those combination locks with the two rows of numbers, 1-9 and a couple of letters… commonly used for employee bathrooms, shoe shop storerooms and other fairly low security locations? Turns out they are way less secure than they appear at first glance, and that they frequently get used to secure things worthy of a much better lock. This talk explores some well-known ways to attack these locks, as well as some new methods that reduce their security even further.