无线传感器网络一种改进的随机密钥预分配方案

Improved Random Key Pre-Distribution Scheme for Wireless Sensor Networks

为解决基本的随机密钥预分配方案连通率较低的问题,提出了一种无线传感器网络的密钥管理改进方案。通过执行一个"邻居"节点扩展协议,使安全孤立节点与一跳以外的节点进行共享密钥发现,从而找到至少一条安全路径来保证网络的安全连通。对改进方案和原有方案在全局连通率、安全性和能量消耗等方面性能的分析与仿真结果比较,表明密钥管理的改进方案以有限的额外密钥协商开销为代价,能换来网络全局安全连通率、可用节点总能量和安全性能的提高。

In order to resolve the problem of low connectivity in the basic random key pre-distribution schemes,we propose an improved key management scheme for Wireless Sensor Networks（WSNs）.By performing a ＇neighboring＇ node expansion protocol,secure isolated nodes find the sharing key（s）with sensor nodes located at the outside of one-hop so that they establish a secure path to guarantee the network connectivity.Analysis and simulation results show that our proposed scheme has higher global connectivity,higher security performance and larger total usable energy compared with the original scheme.And the performance improvement of proposed scheme is in the price of limited additional negotiation overhead.