中文摘要：

针对无线传感器网络中已有的广播认证机制难以支持广播优化、存在延迟等不足,基于虚拟骨干网的思想,构建一个动态阶梯型网络,采用多项式技术,提出了一种能够识别转发节点身份的广播认证机制及其改进方案。该机制计算简单、认证延迟低,而且能够容忍大量的俘获节点;与已有广播认证机制相比,该机制能够支持层次广播优化策略,更适用于大规模网络。

英文摘要：

Due to the existing broadcast authentication mechanism in WSN are hardly support broadcast optimization,and introduce delay in authentication.Based on the idea of a virtual backbone network,this thesis proposed a broadcast authentication mechanism which could identify the forwarding node,adopting the polynomial technique,built on a dynamic hierarchical network.Then the thesis brought forward some improvements.Those mechanisms were lightweight in terms of computation,allowed immediate authentication,and could tolerate a large number of node compromises.Compared with the existing schemes,the broadcast authentication mechanism can support broadcast optimization,and more suitable for the large-scale network.