Research Of Hybrid Key Management Mechanism Based On Wireless Sensor Network

In recent years，along with the rapid development of microelectronics technologyand wireless communication technology，people pay more and more attention to thewireless sensor network technology，as well as the rise of the Internet of Thingstechnology．At the same time its range of applications becomes more and morewidespread，involving environmental monitoring，smart home，telemedicinemonitoring，even traffic management and other aspects．Since the advent of the wirelesssensor network, it has been the focus of attention of many researchers．As an importantpart of the Internet of Things technology，the exploration wireless sensor networks hasimportant theoretical significance and great value．The theoretical research andtechnology development of wireless sensor networks has reached a certain level，so itssecurity problems become very important．This dissertation studies the security issues of wireless sensor networks andreviews a large number of domestic and foreign literature．Due to the constraints of thecharacteristics of wireless sensor networks，the energy，storage space， as well as thecomputing power are strictly limited．The particularity of the wireless sensor networksdestined may face security threats in the network，thus the security program design is achallenging task．In order to defend against security attacks and threats and ensurereliable network security，network security has a higher demand．The reacher on thesecurity issues of wireless sensor networks can be divided into three directions：encryption algorithm，key managements，secure routing．The dissertation reaches the key management mechanism for wireless sensornetworks．Key management can be divided into two categories：one is symmetric keymanagement such as the KDC mechanism and random key pre-distribution mechanism；abother is asymmetric key management mechanism such as the elliptic curve encryption algorithm．This paper presents a hybrid key management mechanism with doublecluster heads based on the advantages and disadvantages of the two managements：ahybrid key management scheme based on the clustering structure，using asymmetrickeys to aid in the distribution of symmetric key．In traditional cluster architecturenetwork， once the cluster head node captured or invalid would result in the prospect ofa rudderless in the cluster，so this program sets up a spare cluster head within thecluster．responsible for the safety of the nodes in the cluster．Spare cluster head caneffectively prevent the cluster node does not work due to the cluster head invalid，ensurethe stability of each cluster and improve the efficiency of cluster head updates．Theprogram in the storage consumption，flexibility and energy consumption has obviousadvantages compared with the random key pre-distribution scheme．...