Patent ID: 8680995

Claim:
A method comprising: providing a secured area having a plurality of security zones where access to each is controlled by an access controller and where at least some of the plurality of security zones are accessed through at least some other of the plurality of security zones; detecting entrances to each 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 of the authorized person over the predetermined previous time period; detecting access requests for the authorized user from the access controllers during a current time period; 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; and granting access to the secured area by the person upon determining that the probability threshold value is greater than an alerting threshold value and less than a lockout value.