Science & Engineering Research Support soCiety (SERSC)
Starting with the discovery of Stuxnet SCADA systems have been the target of cyber threats. Original SCADA system is operating in closed-independent structure is safe from outside attacks, but by the development of IT industry with the advent of the Internet as a connection point is always exposed to hacking threats. As a result, if cyber attacks occur in the SCADA system as a national major economic and social problems will occur. So in this paper, accurate and concise risk calculation proposes. And this formula is can be that indicator of new system's efficiency.