在网络节点之间存在安全依赖关系的前提下，提出了一个基于贝叶斯方法的网络攻击定位和追踪模型。

Under the assumption of security dependence relation among different network nodes, a Bayesian model is put forward for locating and tracing a network attack.

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主要工作概括如下：（1）分析了传感器网络节点定位系统面临的安全挑战、可能受到的安全攻击和安全需求；

The main contributions of this dissertation are:(1) The security issues of location discovery are investigated, including challenges, possible security attacks and security requirements.

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当前对等网络研究的重点是基于分布式哈希表的资源定位问题，以及基于节点间信任机制的交互安全问题。

Currently, the research of p2p is focused on resources location based on distributed hash table and transaction security based on trust mechanism between peers.

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