International Journal of Computer Applications
Supervisory Control And Data Acquisition(SCADA) systems is one of important software systems which are used for monitoring and controlling industrial systems that are geographically spread over thousands of kilometers. These systems need to monitor and control so many field sites through thousands of devices that are varying in type, technology and usage. There are different types of people need to access SCADA systems for different purposes. Because of the sensitivity and spreading of these systems, they are vulnerable by hackers and crackers and there are many risks may causes partially or fully breakdown.