Calculate risk as impact to security and safety Effective risk analysis for

Calculate risk as impact to security and safety

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Calculate risk as impact to security and safety Effective risk analysis for SCADA systems requires a unified definition for mishap and identifi- cation of potential harm to safety. As computer systems are more integrated, the distinction be- tween security and safety is beginningto disappear. In bridging the gap between these domains, we propose a unified risk framework which combines a new definition of mishap with an ex- panded definition of hazard to include the security event. We modify the unified definition for mishap described in Stoneburner (2006) by including the hazard due to security event in a model depicted in Figure 2. The
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figure shows the unified security/safety risk framework. Also, the figure shows that the risk should be calculated as impact of hazard multiplied by likelihood of mishap event. Hentea Figure 2. Unified security framework Nanotechnology: Promise in the future Nanotechnology can help in building security applications (Arazi, 2006), however research and results in these directions are far away. Conclusion Implementing security features as those described above ensures higher security, reliability, and availability of control systems.Thus organizations need to reassess the SCADA control systems and risk model to achieve in depth defense solutions for these systems. The increasing threats Improving Security for SCADA Control Systems against SCADA control systems indicate that there should be more directions in the development of these systems. The above analysis suggests that achieving better quality and more secure SCADA control systems is a high priority. However, a strategy to deal with cyber attacks against the nation’s critical infrastructure requires first understanding the full nature of the threat. A depth defense and proactive solutions to im- prove the security of SCADA control systems ensures the future of control systems and surviv- ability of critical infrastructure. However, “what the future brings depends on two factors: avail- able technology and societal concern” (Bell, Dooling & Fouke, 1999). Perrow (2006) said that “the public is unaware of our basic (US) vulnerabilities in the chemical industry, electric power industry including nuclear plants.”
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