A combined motion detection and access control method and system, the system including a processor for receiving an indication of motion detection within a premises and for ascertaining an area within which the motion was detected; at least one transmitter operable, responsive to receiving, from the processor, an indication of the area, for broadcasting, within the area, an encoded identification of the area; a transceiver associated with an individual and operable for receiving the encoded area identification and, responsive thereto, for broadcasting an encoded identification of the individual and the encoded area identification; and at least one receiver operable for receiving the encoded identification of the individual and the encoded area identification and for communicating the encoded identification of the individual and the encoded area identification to the processor which is operable, thereto, for ascertaining whether the individual is allowed access to the area encoded in the encoded area identification.