期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2006
卷号：6
期号：6
页码：245-252
出版社：International Journal of Computer Science and Network Security
摘要：Sensor networks are characterized by strict resource limitations and large scalability. Many sensor network applications require secure communication, but establishing a shared key for communicating parties is very challenging. The low computational capability and small storage budget within sensor nodes render many popular public-key based key distribution and management mechanisms impractical, especially for clustered sensor networks. For address the issue of key management in clustered sensor networks, we propose a dynamic key management scheme based on key-pool in this paper. We first summarize the existing approaches of key management; in contrast with them, we introduce our scheme which consists of two phases: key distribution and key exchange. By our approach, the cluster heads and leaf nodes construct different size of key rings from the base station respectively, and the new elected cluster head will exchange keys with the old cluster head, which is called role exchange. Finally, a series of performance analysis to our scheme show that, in the clustered sensor networks, the sensor nodes save more memory resource and the entire networks shows great resilience against node capture; and an evaluation of traffic and energy consumption overhead in key exchange phase is also presented.
