In my last post on physical security I talked about improving the security of your locking knobset. This time I am going to talk about the real workhorse of personnel door security: the deadbolt. I will talk about what to look for if you are looking for new deadbolt, as well enhancing deadbolt security on locks you already own/have installed .
Today I am going to present two techniques, one offensive and one defensive. The first is how to shim a door using the ol’ “credit card trick.” The second is how to protect your doors from being shimmed.