一种有效的无线传感器网络广播密钥管理方案

无线传感器网络具有自组织、自管理和能量有限等特性，使其安全性面临严峻的挑战。该文在分析现存组播密钥管理方案的基础上，提出了一种基于BIP(Broadcast Incremental Protocol)和EBS(Exclusion Basis Systems)算法的广播密钥管理方案EBKMP。该方案对生成的广播树进行分组，根据相邻组间海明距离尽量小的原则分配密钥，增强安全性同时有效降低了组成员异动引起的密钥更新消耗。通过与几种经典密钥管理方案对比，证明EBKMP在通信、存储性能和抗合谋攻击能力等方面有显著改善。

An Efficient Broadcast Key Management Policy in Wireless Sensor Networks

With the characteristics of self-organizing, self-management and limited energy of WSN, the security is a great challenge. In this paper, a novel Efficient Broadcast Key Management Policy named as EBKMP is proposed. It divides broadcast trees into groups, and the principle of minimizing the hamming distance between neighbor groups is adopted in keys distribution, which enhances security and reduces the overhead caused by the changes of group members. Compared with present key management policies, EBKMP can improve the efficiency in communication and storage, and resist collusion attack effectively.