Abstract: A transaction security system is disclosed which provides protection and security for transaction customers while conducting their business, such as those visiting a remote bank automatic teller machine. The enclosure can accommodate either or both vehicular and pedestrian traffic. A system of detectors and operators open the appropriate door for ingress of an authorized customer and maintain the doors to the facility closed and locked while the customer is transacting business. When the customer exits the facility, door opening mechanisms are again enabled to offer admittance and service to the next authorized customer.