一种无线传感器网络预配置对密钥的改进方案*

针对预配置对密钥管理方案存在的缺点，引入一个临时初始密钥和混沌加密算法，提出一种预配置随机对密钥的改进方案。该方案能够使加密密钥随机地改变，且可以更新密钥，提高了网络抗破译的能力，实现了对称和非对称密钥体制的结合。分析表明该方案在安全性、密钥连通性、内存需求和密钥协商的计算量等方面有一定的优势，易于在Mica2节点上软件实现。

Improved wireless sensor network key pre-configured scheme

In order to resolve the problem of pairwise key pre-configured scheme in wireless sensor network,the introduction of a temporary initial key and chaotic encryption arithmetic, this paper put forward an improved wireless sensor network key pre-configured scheme. The program enabled encryption key random change, and could update the key,effectively enhance the capacity of the network of anti-decipher,the realization of the symmetric and asymmetric key system integration. The analysis shows that the scheme has a certain advantage in terms of network security, key connectivity, memory requirements and computation of key agreement, etc. It has implemented by easy software on Mica2 node.