基于风险传播路径和节点的复杂网络风险传播行为研究

发布时间：2018-06-10 18:53

本文选题：复杂网络 + 节点　；参考：《兰州大学》2017年硕士论文

【摘要】：今天的信息系统越来越复杂,网络安全越来越重要,正在呈现出新的特点和趋势。复杂网络信息系统网络拓扑结构中节点和风险传播路径在受到实际攻击或者由自身故障引起的级联动力学行为是复杂网络信息系统动态安全的主要表现,鉴于此,本文研究当前比较主流的信息系统安全性能分析的基本理论、框架、模型、常用评估方法以及相关标准等等。在此基础上,本文进一步研究了复杂网络的信息系统网络拓扑动力学行为,提出了复杂网络信息系统风险传播的模型,并对复杂网络信息系统安全风险特征进行了分析;针对信息系统网络拓扑的组成部分—节点和风险传播路径,分别研究了基于节点和风险传播路径的复杂网络信息系统风险传播模型,以此弥补大多数风险计算方法未将网络风险动态传播考虑在内的不足。在基于节点的风险传播模型中,为分析当网络受到攻击或发生故障时网络拓扑中节点状态的变化,提出基于节点的故障概率的算法和基于节点故障的节点间风险传播概率的算法,并以实例对本节提出的算法进行实验,通过结果分析进一步验证了算法的准确性。在基于风险传播路径的风险传播模型中,为分析当网络受到攻击或发生故障时网络拓扑中风险传播路径状态的变化,提出基于风险传播路径故障概率的复杂网络风险传播模型,通过风险传播路径故障概率矩阵和风险传播路径权重矩阵的乘积得到基于风险传播路径风险传播的概率矩阵,并通过对风险传播概率矩阵的分析,对风险传播路径的状态做出合理的判断,并以此结果指导实际工作中的网络工作。
[Abstract]:Today's information system is becoming more and more complex, network security is becoming more and more important, is showing new characteristics and trends. The cascade dynamic behavior of nodes and risk propagation paths in the network topology of complex network information systems is the main manifestation of dynamic security of complex network information systems. This paper studies the current mainstream information system security performance analysis of the basic theory, framework, model, commonly used evaluation methods and related standards and so on. On this basis, this paper further studies the topological dynamics behavior of complex network information system, puts forward the risk propagation model of complex network information system, and analyzes the security risk characteristics of complex network information system. Aiming at the component of network topology of information system-node and risk propagation path, the risk propagation model of complex network information system based on node and risk propagation path is studied, respectively. This makes up for the deficiency that most risk calculation methods do not take network risk dynamic propagation into account. In the node-based risk propagation model, in order to analyze the changes of node states in the network topology when the network is attacked or fails, An algorithm based on node-based fault probability and an algorithm of risk propagation probability between nodes based on node-fault are proposed. The algorithm proposed in this section is tested by an example, and the accuracy of the algorithm is further verified by the result analysis. In the risk propagation model based on the risk propagation path, in order to analyze the change of the risk propagation path state in the network topology when the network is under attack or failure, a complex network risk propagation model based on the risk propagation path failure probability is proposed. Through the product of the risk propagation path fault probability matrix and the risk propagation path weight matrix, the risk propagation probability matrix based on the risk propagation path is obtained, and the risk propagation probability matrix is analyzed. The state of risk transmission path is judged reasonably, and the result is used to guide the network work in practice.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O157.5

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