Lockpicking Guide.pdf

Lock Picking

Michael Lee

Math 187

Spring 2004

Lock Picking and Cryptanalysis

Cryptanalysis is the study of techniques that

facilitate the deciphering of cryptographic code.

Cryptanalysis is the study of techniques that

facilitate the deciphering of cryptographic code.

Lock picking is a very similar science with the

primary difference lying in the fact that while the

bulk of cryptanalysis takes place in an

indefinable place, lock picking is a physical

activity and is done by feel. Aside from this

basic difference, both of these arts are based

upon the same principal, overcoming an obstacle

that is in between you and something you are

trying to access.

Lock Picking

Cryptanalysis

Object in physical world

Equivalent object in

Cryptanalysis

Lock on object (door, safe,

padlock, etc.)

► Unbroken cipher text

padlock, etc.)

► Key to the lock

Key to the cryptographic

system used

Item(s) you are attempting

to acquire/gaining entry to

► The message in plaintext

to acquire/gaining entry to

an area

Equivalent object in

Unbroken cipher text

► Lock on object (door, safe,

Key to the lock

► Key to the cryptographic

The message in plaintext

► Item(s) you are attempting

How a Lock Works

A majority of locks are of the style pictured above, known as

cylinder locks. As any key is inserted into the keyhole the

pins

(denoted in both red and yellow) are pressed upon by the key

and in turn compress the springs. If the correct key is used,

each of the springs will compress just enough to allow the yellow

and red portions of the pin to straddle the

. Since

they are simply laying upon each other, when this occurs the

cam

cam is able to turn freely and the lock can be opened.

A majority of locks are of the style pictured above, known as

cylinder locks. As any key is inserted into the keyhole the pins

and red portions of the pin to straddle the shear line

shear line . Since

is able to turn freely and the lock can be opened.

Lock Picking Tools

Picks are used to lift individual pins

► Tension Wrenches are used for attempting to turn the

Tension Wrenches are used for attempting to turn the

cam, or, in other words create tension.

► Picks are used to lift individual pins

cam, or, in other words create tension.

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