Research On Combination Evaluation Model Based On Game Theory Integrated Weight Method And Grey Fuzzy Theory

Through the understanding and analysis of the evaluation model,we can see that there are many risk factors that affect the network information system security,and the relationship is complex.It is difficult to establish a more accurate evaluation model for information system security assessment.According to the weight of risk factors determined by expert scoring by AHP,there are subjective human factors.Entropy weight determines the weight of risk factors through the size of information in network information system,and there is absolute objectivity.By combining the fuzzy AHP and entropy weight method,this paper avoids the existence of subjectivity and absolute objectivity by using the comprehensive weight method of game theory,so as to determine the weight coefficients of all risk factors.Based on grey fuzzy theory,the membership degree and grayscale are summarized into the risk assessment of network information system,and the evaluation algorithm is improved.A combined evaluation model based on game theory,comprehensive weight method and grey fuzzy theory is established.The combined model is used to determine the weights of all risk factors in the network information system based on the game theory and the weight and subjective and objective factors.At the same time,the weight of grey fuzzy theory and the risk factors of network information security risk assessment system based on full consideration of the information system of grey and fuzzy,the effective combination of qualitative and quantitative analysis,quantitative evaluation of network information system risk level,provides an effective method for risk evaluation of network information system.Through the combined evaluation model,the risk assessment of the network information system security of the LAN is carried out,and the evaluation results are obtained.Compared with the evaluation model based on fuzzy AHP and grey fuzzy theory and the evaluation model based on entropy weight method and grey fuzzy theory,it is verified that the evaluation value of the combined evaluation modelproposed in this paper is stronger than the real value.Finally,more than 0.07 risk factor weights of network information system of a unit(environmental safety,management,backup,access control,virus prevention and authentication)management,put forward the corresponding management strategy,bring the network information system can effectively prevent the safety problem of loss.