无线传感器网络门限密钥共享模型

Threshold Key Sharing Model in Wireless Sensor Networks

针对现有传感器网络密钥管理方案存在的网络连通度低、抗俘获性差、节点能耗高等问题,该文提出一种基于(q,l)门限秘密共享的密钥共享模型,采用"虚拟簇头共享密钥,物理簇头重构密钥"的方式完成簇头与簇成员的密钥协商。该模型实现了簇成员能耗最低、抗俘获性最优的目标,同时门限参数l和q能够调节簇头的抗俘获性、容错性和高效性。理论分析与实验证明,与传统的概率型方案相比,该模型有效地提高了节点抗俘获性和网络连通度,并降低了节点能耗。

Most traditional probabilistic key management schemes of wireless sensor networks have disadvantages of low connectivity,poor resiliency against node capture,and high energy-consumption.A key sharing model is proposed based on（,）-threshold secret sharing.In this model,a key is divided into shadows to be shared by ＂virtual cluster heads＂ and re-constructed by the ＂physical cluster head＂.For tiny cluster member nodes,this model is optimized in improving their resilience against node capture attacks and saving the energy consumption.At the same time,the cluster head nodes＇ properties of security,tolerance and efficiency can be adjusted by controlling the parameters of q and.Both theoretic analysis and the experimental results prove that,this model improves effectively the resilience against nodes capture attack and the network connectivity,and decreases the nodes＇ overheads.