无线传感器网络的位置隐私保护路由

Location privacy protection routing for wireless sensor network

当无线传感器网络用于监控敏感对象时,被监控对象的位置隐私成为一个关键问题。在传感节点发送的一连串信息,经过多跳,向基站报告一个监控对象时,敌手可以反向追踪信息源的位置。基于洪泛的幻影路由具有较小的安全期和较高的能耗。为了使敌手难于跳到跳地反向追踪传感节点通信的信号源,提出了基于定向随机步的幻影路由。在基于定向随机步的幻影路由中,每个消息都经历两个阶段:首先与基于洪泛的幻影路由一样,是一个随机步或定向步,随后是定向随机步直到基站。与基于洪泛的幻影路由相比,基于定向随机步的幻影路由明显具有较大的安全期和较低的能耗。

When Wireless Sensor Network （WSN） is used to monitor sensitive objects, the location privacy of monitored objects becomes a key issue, When a sensor node reports a monitored object to base station by sending a series of messages through multiple hops, an adversary may trace back the source location. Flooding-based phantom routing has a problem that safety period becomes smaller and energy costs become higher for protecting source-location privacy. In this paper, directedrandom-walk-based phantom routing was proposed to make it difficult for an adversary to backtrack hop-by-hop to the origin of the sensor communication. In directed-random-walk-based phantom routing, every message experiences two phases： the first, the same as flooding-based phantom, is a random walk or directed walk, and a subsequent directed-random-walk to deliver the message to the base station. Compared to flooding-based phantom, directed-random-walk-based phantom routing has clearly larger safety period and lower energy costs.