基于代码片段的无线传感器网络密钥更新方案

摘要

针对当前无线传感器网络密钥更新技术存在的安全隐患,提出了一种基于代码片段的密钥更新方案(简称CSKUS方案).CSKUS首先为传感器节点预分配初始密钥以及代码片段,相邻节点之间通过交换代码片段获得相同的代码片段集;然后利用代码片段集所组成的更新程序完成密钥更新.理论分析表明,CSKUS不仅具有很高的安全性,同时具有计算、通信开销低的特点,完全支持大规模无线传感器网络.%Allowing for the safe leak of the present key updating technology for wireless sensor network, proposed a new key updating scheme based on code slices( call it CSKUS for short). In CSKUS,preloaded an initial key and some code slices on each sensor node. After exchanging code slices by neighbor nodes, any two neighbor nodes could get the same set of code slices. Then the set of code slices could make up a key updating program which could be used to update the pair-wise key. According to the theory analysis, CSKUS can insure high security with low overhead of computation and communication, and it supportes large scale wireless sensor networks well.