DGroves..... we'll both chuckle over this.....
One of us is right... I thought he was asking about the silver physical case lock key. Those have a code on their butt end, and that has always been the same code from what I have seen. Each workstation comes with 2 identical keys so I've given away backups to my buddies who really want to lock down their boxes.
Given the millions of identical keys out there I advise they supplement with a real lock......
Best, Scott