A Novel Dynamic Key Management Algorithm for Wireless Sensor Networks
A comprehensive model of key management algorithm is important for WSNs. In this paper a novel management algorithm of WSN is presented which combines the existing algorithm, generalizes them, and extends them by explicitly addressing certain activities not included in them. Although several methods of making the key have been proposed and already been adopted in different types of WSN, most of the existing methods are to pre-select many keys from a key pool and form a key chain. Then, the sensor nodes use the key of the key chain to encrypt the data. However, when the secret key is being transmitted, it is easy to expose in the path of transmission. Unlike previous algorithm, this algorithm explicitly represents the package transfer flows between sensor nodes, which can improve the security of the key in comparison with the existing methods. Besides, the dynamic update of the key can lower the probability of the key to be guessed right. In addition, with new algorithm, the attack on the WSN can be avoided. The result of an evaluation of the algorithm are presented.
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Document Type: Research Article
Publication date: March 1, 2012
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