To understand lock-picking, then, you first have to know how locks and keys work.
Locks come in all shapes and sizes, with many innovative design variations.
You can get a clear idea of the process of lock picking by examining one simple, representative lock. Most locks are based on fairly similar concepts. A standard deadbolt lock. When you turn the key, the bolt slides into a notch on the door frame. Think about the normal dead-bolt lock you might find on a front door.