SCADA Systems usually rely on databases updated in real-time. The SCADA server, which is the main component, constitutes the interface between the monitored technological system and the SCADA application. In other words, the SCADA server is responsible for facilitating the data flow between the technological process and the database. Similarly, the SCADA clients enable the human operators to from or write to the database .Thus the main purpose of SCADA applications is to support the access to the database