An
access control system, has at least one door to a secured area, each door having a strike plate, a host computer, at least one door control module coupled to the host computer, one door control module for every door; and at least one door reader coupled to the at least one door reader coupled to the door control module to activate the strike plate to release the door. The
access control system further has at least one electro-mechanical key to independently actuate a lock that corresponds to the door(s). A master
keying device to rekey the lock that corresponds to door(s). The host
system records information selected from the group consisting of time of entry, place of entry, identification of entered party, and / or any combination thereof. In addition, a door knob and mechanical
locking mechanism selectively latches and unlatches the
locking mechanism and can be actuated with a mechanical key; and circuitry to actuate the
locking mechanism to selectively latch so that the door can open, the circuitry actuated by an electrical
signal transmitted by an electrical key, the electrical
signal communicated by an electrical contact extending through the mechanical locking mechanism. The circuitry is powered by a battery, which can be removed without disturbing or actuating unlocking mechanism. The contact is an insulated electrical wire that extends through the locking mechanism to the circuitry. All of the circuitry discussed can be integrated onto a single, monolithic piece of
silicon in a multi-
chip or single-
chip format. A master
rekeying device has input / output circuitry to receive and transmit electrical signals, circuitry coupled to the input / output circuitry to
record a
list of security passwords in order to check passwords against the
list and a memory to store data; and the input / output circuitry also receives and transmits electrical signals to a host computer.