分簇式传感器网络多项式密钥预分配改进方案

针对分簇式传感器网络，提出一种改进的多项式密钥预分配方案。利用二元四次多项式密钥预分配方案，建立簇头节点之间的通信密钥，以解决阈值安全问题，降低节点开销，采用认证机制保证密钥建立过程的安全性，并支持节点加入与撤销。分析结果证明，该方案可以保证网络的连通性和安全性，节点的存储、通信及计算开销均较小。

Improved Polynomial Key Predistribution Scheme for Clustered Sensor Network

An improved polynomial key predistribution scheme is proposed for clustered sensor networks. The communication keys among cluster head nodes are obtained according to the symmetric property of two-parameter 4th-order polynomial, which solves the threshold security problem and makes the node overheads lower. The communication keys between the cluster head node and its common nodes are built with little communication after all the nodes are deployed, the authentication mechanism guarantees the security during communication keys establishment. It indicates that the scheme appears to be connective and secure, simultaneously makes the overheads of nodes low. It is shown that addition and revocation of the nodes are feasible in the scheme.