You don't have to go down to your police station with a copy of your key every time you change you lock, which some of the "solutions" imply. Further, there are

You don't have to go down to your police station with a copy of your key every time you change you lock, which some of the "solutions" imply. Further, there are no laws for how strong of a door you can build: you're more than welcome to have a safe with a 3-ft thick steel door and an unpickable lock, that'd take a professional a month to get through.