Research On The Security In Wireless Sensor Network

A distributed sensor network is composed of a large number of sensor nodes that are densely deployed. They are being deployed for a wide variety of applications, including military, security, environment monitoring, traffic control, patient monitoring and tracking, manufacturing industry, opposing terror networks and fighting natural calamities. With the research further and applied widely of sensor networks, security has aroused great concern. Because the limitation of sensor nodes' calculation speed, power energy, communications capacity and storage space, and usually deployed in harsh, unattended or even hostile environment, security communication in sensor network becomes extremely important. In security communication of sensor network, the confidentiality and integrity of information are critically important. This makes key management and authentication information in a sensor network security research become an important issue. Based on the security needs of wireless sensor network, and several key pre-distribution scheme for wireless sensor networks, this paper made an intensive study of key pre-distribution scheme and make some improvements in the prepare sharing key management. By mean of distributing node ID to nodes reduce the saving quantity of key and overcome the hidden trouble of security because of depositing a great of unusage key information.At first, we analyzed all kinds of threats faced by wireless sensor networks and verified its security situation. Then, we concentrated on the analysis of key management problem, the fundamental security problem in the field of WSN security. We summarized the research work in the field and pointed out the advantages and disadvantages of the current key management schemas by analyzing and comparing them. In the end, we gave the research directions of key management in WSN.