Thanks to Johan Nilsson (from Sweden) for alerting me to this threat we have to be concerned about: bump keys.
The interesting things about locks is that locks can be picked or broken – this is not new knowledge, but something that we’ve dealt with for years. When it comes to considering physical security, locks are an effective deterrent (and some locks do prove quite a challenge to pick, based on my feeble attempts).
Well, turns out that now more knowledge abounds about the concept of creating a bump key that is likely to help you open most any lock with not much effort. I’m not sure I’m going to try it, but I think that engadget has a decent summary (permalink: http://www.engadget.com/2006/08/07/bump-keying-1-keys-open-any-lock/).
And here is the information from Johan that you may find of value: http://www.toool.nl/index-eng.php
One more thing for us to know, consider and be aware of.