You can make a electronic bump key that will open most doors for <$100, most buildings have windows (cover them in duct tape to break without noise), and even the wire mesh in the walls of a "secure" building can be cut with thermite. If you want real physical security you're going to need much harder materials: steel, titanium, tungsten, concrete.<p>This comment captures the security problem well.<p>> "[Locks] are more of a tamper-evident seal, or a delay tactic. The issue with bumping, picking, carding, and 3d-printing is how it invalidates the current approaches towards those two aspects."<p>However, of those options, 3D-printing is clearly the worst. Bump keys and carding latches takes seconds, picks minutes, and 3D printers hours. It seems that the only situation this method would be useful is with advance access to a key, a radial-pin lock, and a free 3D printer.