关键词: 无线传感器网络, 网络安全, 二元对称多项式, 门限, 分簇

Abstract: Wireless Sensor Network (WSN) was usually vulnerable to conspiracy attack from its adversaries when using bivariate polynomial key pre-distribution protocol. In order to solve this problem, a pre-distribution key management scheme for WSN was improved by reducing the amount of pairwise keys sharing between sensor nodes and changing the means of establishing pairwise keys between clusters. Analysis shows that the improved scheme not only maintains the advantages such as higher security of the original scheme, but also saves the limited memory storage of sensor nodes further, reduces the communication overhead of sensor nodes, extends the lifespan of the networks and can withstand conspiracy attack effectively.

Key words: wireless sensor networks, network security, bivariate symmetric polynomials, threshold, clustering