新型网络信息系统安全模型及其数学评估

从系统功能的意义上分析了网络信息系统安全所面临的威胁，建立了一种新型通用网络信息系统安全模型，确定了影响网络信息系统安全性能的相对独立的基本因素和相应的子因素。采用模糊数学的理论，建立了一种新型综合安全评估数学模型和模糊相似选择方法。通过示例应用分析，以量化方式评估示例网络信息系统的安全性能，确定了网络信息系统的量化安全等级和排序，从而验证了该系统安全模型及数学评估理论的有效性和新颖性。

New Security Model of Information Network System and Mathematical Evaluation

This paper establishes a new security model of information network system in the way of systematically analyzing the security threatsto the information network system, and determines the relative independent fundamental factors and corresponding sub-factors on security functionsfor information network system. Then it makes a new mathematical model and the method of fuzzy similarity selection on evaluation of securitywith the fuzzy theory. It applies the model quantitatively in evaluating security functions for five example systems, and obtains the quantitativesecurity grades and sequences of the five information network systems. In this way the availability and the novelty of the system security model andthe mathematical evaluation theory are verified.