The Research On Evolution Dynamics Of The Network Security State

With the constant expansion of computer network and applications, the factorsaffecting the network security and performance are on the rise and the correlationamong the factors is getting more complex. How to make the networks more secureand stable has become a great challenge for the network administrators.On the basis of the complex network theory and methods, this paper researchesthe mutual influence on the microscopic changes between the network nodes aswell as the macroscopic impact of the microscopic changes on the entire network.The main work of this paper is as follows:Based on the deep research and analysis of the theories and methods ofcomplex network and synchronization, discuss the classification of the differentsafety factors from the point of diffusion and synchronization.From the point of diffusion, discuss the spread characteristics. Take the virus asan example, research different characteristics produced in the process of diffusionand the diffusion and recovery, and the influence of the delay on the diffusion. Onthe basis of the synchronization dynamics theory, analyze the factors affecting thecapability of the network synchronization, the star-network synchronization and itsstability, and obtain its sufficient conditions of the stability equilibrium point.Based on the method of community structure of complex network, putforward the idea of star-shape network structure in order to achieve the purposesimplifying the network topology and getting the entire state of network, andsuggest a algorithm for star-shape structure based on the module-degree.From the top-down point, put forward a network abnormality analysis model.Take the abnormal flow of a university as an example, analyze the reasons andpositions that the abnormal flow produces.