Analysis And Research On The Influencing Factors Of Network Security Transmission Situation

With the development and application of the network, Internet is flooded with a large number of security incidents. Network attack has increasingly rapid pace and its scale become larger and larger. The degree of automation has also been growing. It would have great significance to know the situation awareness and understand network security incidents in the propagation characteristics.From the propagation process of network security incidents, we study the situation transmission and dig out three major factors from the impact of security incidents spread trend: the host vulnerability, the different attack mode of security incidents and the environmental characteristics. The host with different vulnerabilities will have different infected probability. Then the different distribution of network hosts with vulnerabilities will affect the spread of security incidents. Different modes of attacks will make security incidents have different characteristics and the performance in the spread will be different. Basic environment include topology, routing strategy, network bandwidth and network delay etc. The changes in the environment will also have an impact on the spread. The impact of topological characteristics is often overlooked by the people. This paper tries to carry more in-depth exposition about topological characteristics and extract several attributes to description the impact of them.This paper use wormer as an example of security incidents. After extracting the affect factors, we use NS-2 simulator to simulate the behavior of wormer to test and analyse the influence of different factors.Considering the above factors, this paper put forward a characteristic parameter to description the spread features which is called Security Situation Transmission Parameter. We give its formal formula and then discuss the application of the parameter in the analysis of the network security incidents situation transmission.