The Research On Security Model Of Power Information Systems

Based on the present situation and the security threat to Power Information System(PIS), the security situations and goals are put forward.The Power Information System security model is built by referencing existing information system security model and framework,and determining many factors as well as their sub-factors affecting Power Information System security.By using fuzzy theory,a multi-class fuzzy comprehensive judgment model and its evaluation method are given.According to the features of Power Information System,the fuzzy judgment matrix and the weight coefficients of factors are determined.The security performance of Power Information System is evaluated in a way of fuzzy measurement.Calculation examples prove that this method can determine Power Information System security level,hence validating the model is practical and the method is effective.