LiteST:一种无线传感器网络轻量级安全时间同步协议  

LiteST: a lightweight secure time synchronization protocol for wireless sensor networks

作　　者：尹香兰[1] 齐望东[1] 

机构地区：[1]解放军理工大学计算机系,江苏南京210007

出　　处：《通信学报》2009年第4期74-85,共12页Journal on Communications

基　　金：总装"十一五"预研基金资助项目(41101040302)~~

摘　　要：提出了一个简单的时间同步广播报文完整性认证方法。在此基础上,结合单向链(而非复杂得多的μTESLA)提供的发送节点身份认证功能和冗余机制提供的防止内部节点攻击功能,设计了一个轻量级的安全时间同步协议LiteST(lightweight secure time)。理论分析和仿真实验结果表明,LiteST能够防御外部攻击并能容忍内部攻击节点发送错误信息,达到了目前最好的安全时间同步协议TinySeRSync类似的安全性。32个Mica2节点组成的原型系统实验结果表明LiteST协议取得了与没有安全机制的FTSP协议几乎相同的时间同步精度。LiteST协议与安全相关的计算开销大约只有TinySeRSync的五分之一;通信开销为其1/(2m+2),其中m为网络节点的平均邻居数;其存储开销在实际的场景下也显著降低。A simple approach was put forward to check the integrity of broadcast messages. Integrating with one- way-hash chain to authenticate the sender of broadcast messages and a new redundant mechanism to deal with insider attacks, a lightweight secure time （LiteST） synchronization protocol was proposed. Analysis and simulations show LiteST can defeat external attacks and is resilient to compromised nodes and it achieves comparable security performance against TinySeRSync, the best secure time synchronization protocol up to date. Experiments with a network of 32 Mica2 motes show that LiteST achieves much the same time precision as FTSP, a time synchronization protocol without security fea- tures. The processing cost of LiteST is about one-fifth of TinySeRSync and the communication cost 1/（2m＋2） of the latter, where m is the average neighbor count of nodes in the network. In addition, the storage requirement of LiteST is much lower than TinySeRSync in practical scenarios.

关 键 词：无线传感器网络 时间同步协议 安全 轻量级 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]