| With the popularization of computer and the development of science and technology,the management of various fields in daily life has been gradually transformed into the management of information.In the use of information systems,more efficient,convenient,comprehensive functions have been looked as the criteria for consideration.However,all the functions of the system should be based on a safe and reliable basis.In order to accurately judge the security of the system,the risk assessment is an indispensable link.Due to the complex structure of information system,software and hardware including range,increased a lot of difficulties and obstacles for risk assessment,purely quantitative models using machine can not fully the safety control of the whole system,at present most of the evaluation model to evaluation data is still relatively abstract manual as a basis for the quantitative research,including interval number fuzzy frame method evaluation model of comprehensive evaluation and analysis based on the level of this study is the use of more extensive and relatively effective method.The interval number fuzzy comprehensive evaluation is a method to judge the factors,and the analytic hierarchy process is a method to calculate the weight of the factors.Interval number fuzzy comprehensive evaluation based fuzzy comprehensive evaluation of the development,but the model still has some problems:ignore the information sources of evaluation factors,there is no difference between the analysis of the assessment,to the views of all the same emphasis.On the other hand,AHP after years of development is comparatively mature,but it can only be for a single person gives weights to calculate the weight assignment views are not comprehensive group,only the weight calculation subjectivity of AHP,easily lead to subjective error.In view of the above shortcomings,this paper did the following things.on the one hand,the single factor evaluation matrix of fuzzy comprehensive evaluation in the form of improved,retained the assessment information,to overcome the simplistic and superficial quantization may result,make the calculation process more scientific and rigorous,then use the relevance of the assessment opinion recognition of bad judgment,to overcome the influence of individual differences,human preferences and other subjective factors on the results,and retained the greatest degree of evaluation according to their own knowledge and experience to make more comprehensive judgment;on the other hand,in the calculation of the weight factors,using the FOWA operator,the AHP fuzzy number judgment matrix conversion method in the form of a vector,the correlation of multiple evaluation given by the weight vector sorting,finally get group opinion,to avoid the result of the impact of individual weight.Finally,the results of the whole system are obtained by the combination of the two values.The improvement based on the value of the evaluation factors and the weight value calculation method,based on a more reasonable evaluation of the whole system.At the same time,through the adjustment and refinement of the overall assessment of the implementation of the framework,make more operational risk assessment,by the end of an actual system assessment shows the feasibility of the improved scheme. |
