Research On Model Of Situation Awareness In Wireless Sensor Network

With the gradual expansion of applications, wireless sensor networks exposed a large number of security problems due to the open communication media, deployment in harsh environments and other reasons, which brought great risks for the information security in wireless sensor network. These problems severely restrict the application of wireless sensor networks.Detecting security threats timely can help network managers making decisions earlier and reduce network security risks. To improve the accuracy and sensitivity of the evaluation in terms of wireless sensor network security, the concept of security situation awareness is introduced. The theory of set pair analysis is adopted to establish the mapping between situation factors and the network security situation. The full coverage theory of wireless sensor network is adopted to predict the damage and distinguish the level of threats. And the analytic hierarchy process is used to determine the contribute rate from situation factors to the network security situation. The strength of security threat is assessed by the network security situation and the network threat situation. The author test and verify the network security situation awareness model based on set pair analysis and threat situation awareness model based on cluster analysis by simulating attacks. The experimental results prove that the model proposed in this paper can improve the accuracy of network security assessment. It is more sensitive and accurate than the model based on security entropy. It can also predict the development trend of network threats.