So i decided that im going to reveal my design i've been working on for a totally unpickable lock. So imagine a regular pin tumbler lock. My lock has a sidebar coming in from the side that the edge is bevelled so that when the sidebar goes into the lock, the angled edge lifts the pins to sit on top of the sidebar. This position is how the sidebar is normally, it sits inside the plug completely and has the pins on top of it. Now, infront of the pins on the flat part of the sidebar, it protrudes upwards to the height of the keyway to block any view of the pins. The front and back of the sidebar is angled as is the tip of the key to allow the key to push the sidebar out. When the key is fully in, the sidebar slide back into the keyway through a hole in the key to match the sidebar. Now the plug can turn. If the attacker tries to gain access to the pins by moving the sidebar out, the tolerances will be so that the sidebar binds before the pins (just make the pins a little looser in the chambers than the sidebar). The pins will go up but won't stay up or bind at all. In order for the pins to bind, the sidebar has to be in, but then the pins are not accessible. In order for the pins to be accessible, the sidebar has to be out but the pins can't bind. It's a circle with the key as the only solution.
This is a horrible explanation of the lock still, but i can't upload the attatchments since they are in e-drawings. you can view the e-drawing files by downloading the e-drawings free viewer here:
http://www.solidworks.com/sw/support/downloads.htm and if you want the files, send me a message with your email and i will email them to you.
