Lock Bumping

[arppt01]

By restricted key do you mean a key whose dice is unique and not known by anyone other than the manufacturer?

[vicki2]

He probably also means a key that you have to produce i.d. and sign to get a copy made.

[juol]

I think that is one reason why you should by expensive locks. And if you are in your home, have chains installed as well. Don't rely purely on door knob locks.