Access control system based upon behavioral patterns

The method includes the steps of providing a secured area having a plurality of security zones where access to each is controlled by an access controller, detecting entrances to at least some of the plurality of security zones by an authorized person through respective access controllers of the plurality of zones over a predetermined previous time period, forming a probability model of entry into each of the plurality of security zones from the detected entrances over the previous time period, detecting access requests for the authorized user from the access controllers during a current time period, and generating a security alert upon determining that an access request of the current access requests exceeds a probability threshold value associated with the probability model. In the method permission is checked using scanning of a magnetic strip, fingerprint, iris or RFID. Current behavior is then assessed relative to the profile of previous use and a probability value for this behavior is compared to three threshold values. A first threshold a which represents little deviation from normal and may require the supply of a pin number, a second threshold b which allows access but represents sufficient deviation to merit a security alert which flags a CCTV camera and a third threshold c where access will be denied.