The evolution of an access control system

There is a tongue-in-cheek saying in the Security Industry that leeks and keys are “for keeping your friends out”. This little joke has a ring of truth to it which becomes clearer the more you consider just how easy it is to circumvent most ordinary security measures such as door and window locks. And yet the control of access to ofices, corridors, storage rooms, equipments rooms, and other areas of typical office facilities by ordinary locks and keys remains a first line of defence against unauthorized entry.