Research On The Security In Wireless Sensor Network

Wireless sensor network(WSN) is a self-organization network which consists of large number of low-cost,low-power tiny sensor nodes that can communicate with each other to perform sensing and data processing cooperatively,it can accomplish real-time monitoring, collecting and processing information of the monitored subject and transmit the information to the users. As a new technology for information acquisition and processing, the WSN has a wide application prospect and high value in lots of domains like military, environment, health care, home, which makes its security issue becomes an important problem. In the field of WSN security research, information confidentiality and active defense of the network is critical, which has made the technology of key management and intrusion detection becomes an important research issue in the WSN security research field.Based on introducing the relevant security knowledge of WSN, by analysis of the WSN security threat and combined with its own security need, some security technologies and methods of WSN are analyzed and studied in this paper. We mainly study the key pre-distribution mechanisms of WSN, compared the advantages and disadvantages of several classical key pre-distribution mechanisms, and their performances were also evaluated and compared.According to the idea of taking advantage of the location and deployment information of nodes, this paper designs a key distribution scheme which combined the Blom scheme with square deployment model, to improve the security connectivity and anti-attack ability of network by constructing a square network deployment model. The simulation result shows that this scheme can enhance the anti-attack ability of the network effectively compared to the existing scheme which based on the location information of nodes.Combined with the good scalability of agent and based on the exploration and study of the intrusion detection in WSN, this paper gives a distributed intrusion detection model based on agent for WSN, which takes efficient information integration strategy. It integrates the local detection and global detection as a whole, and improves the detection ability of the system.Finally, we summarize the work done by this paper, point out the deficiency and future research of this paper.