安全高效的无线传感器网络密钥管理方案

摘要

针对Echenauer和Gligor的随机密钥预分配方案中存在的不足，提出一种把密钥池中的密钥分为不同的安全级别的密钥预分配方案。该方案利用Hash函数的单向运算特性，使安全等级高的密钥不会泄露出安全等级低的密钥信息，而节点间通信密钥的建立不受影响。分析表明，与现有的密钥预分配方案相比，该方案的通信开销、存储开销和计算开销变化小，安全性能高，适合在无线传感器网络中使用。%In light of the defects of Echenaue and Gligor probabilistic key pre-distribution scheme , we present a key pre-distribution scheme which divides the keys in key pool into different safety grade .The scheme uses the one-way computation property of Hash function to enable the keys with higher safety grade having no possibility in disclosing the key information with lower safety grade , while the establishment of communication keys between the nodes is not affected .Analysis shows that compared with existing key pre-distribution scheme, this one has less changes in overheads of communication , storage and computation , has high safety , and is suitable for application in wireless sensor networks.