Users can access the controls in the work area. It must be the agency prior permission of the Controller General. It is characterized by the presence of cards. With photos and details. And user authentication for access by a security guard. In terms of access to areas such as the control room. Each user will hold the keys. Therefore, the key must be distributed to all users. If the quantity of users and the more it is not easy to manage keys. Lenders can not set the time for work and can not verify the identity of the area.