基于Hash函数的无线传感器网络密钥预分配方案

Key pre-distribution scheme for wireless sensor networks based on Hash function

密钥分配是无线传感器网络通信安全的基础。在Echenauer和Gligor的随机密钥预分配方案的基础上,提出了一个基于Hash函数的密钥预分配方案。该方案利用Hash函数来计算出节点中部分的预置密钥,用Hash函数的单向运算特性来增强网络抵抗攻击的能力。分析表明,与现有的密钥预分配方案相比,该方案的计算负载小,安全性能高,更适合于无线传感器网络。

Key distribution plays a fundamental role in Wireless Sensor Networks （WSN）. A key pre-distributing protocol based on Hash function was proposed, which extended the ideas of the probabilistic key pre-distrlbution scheme put forward by Eehenaue and Gligor. In this scheme, some of the pre-distribution keys in the nodes were computed by Hash function. With the advantage of one-way Hash funetion, this scheme could enhance the ability of network to resist attacks. Compared with other schemes, this one has less computing overhead and higher security performance, which is more suitable for WSN.