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- Opening Master Locks
- ====================
-
- By Mach Three
-
-
- If you read the last file, "Opening Master Locks," and tried it out, you
- probably have realized that it doesn't really work. When you turn the dial
- with the lock closed, most of them will NOT stop at some number. Here is a
- technique that does work to some degree, but it's not very powerful because you
- need access to the open lock. Well, here it is:
-
- 1) You need to get access to the lock when it is open. If you just want to
- impress your friends, this is usually pretty easy to do. Most people will open
- up their locker or whatever, and leave the lock open while they are nearby
- working on something. Then, when they are done, they'll lock the stuff up.
- So when your friend is working, go up to the open lock and pull the shackle
- (the horseshoe part that opens) up to the top. With the lock open and the
- shackle pulled hard to the top, NOW turn the lock all the way c
- lockwise until you can turn it no farther. Add five to the number it is on,
- and you now have the first number.
-
- 2) Now, before you did step 1, what you should do is read the number on the
- combination lock before turning the dial. 99% of the people will leave their
- combination on the last number when they open it (You don't spin the dial to a
- random number every time you open and close your lock, do you?) So just by
- visually inspecting what the number is, chances are you have gotten the last
- number.
-
- 3)
- Okay, now that you have the first number and the last number, when your
- friend has closed his lock and is gone, or whatever, you can open it up to get
- the second number. Just try every possible second number, and try to open the
- lock, which will not take too long because you only have 60 numbers to go
- through.
-
-
- Addendum: Are there really sixty numbers to try? No! Just because there are
- sixty numbers on the dial does not mean you have to go through sixty numbers.
- In reality, you can be off by 1 number. For example, if the combination is
- 10-20-30, you could spin to 9-19-31 and still open the lock. This means that
- instead of 60 numbers, in effect there are really only 30 numbers. Cuts the
- lock down pretty small huh?
-
- So if you HAD to open the lock, you can use this technique of "fewer numbers"
- to try every possible combination. For each number try 2-4-6-8...and so forth
- until you get back to zero. This can be useful in case you can get only one of
- the numbers (such as the last number, which you can just read off the dial, or
- only the first number). In this case, when you have one number, there are only
- two more to get. This means there are about 900 more combinations for you to
- try....sure, it's a lot of combinations to spin through, but if you are good it
- would take you about one hour to try them all. So on the average, it would
- take a half an hour to open a combination lock, given one of the numbers.
-
- Only a half hour...not bad, considering there might be some good stuff inside!
-
- One final note is that many locks have a KEYHOLE in the back...I have no idea
- why they do this, because it totally defeats the purpose of the combination
- lock. These keyholes are usually pretty small - and if you are a decent
- lockpicker you can open the lock up by picking it through the keyhole in around
- 10 minutes.
-
-
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