Location privacy protection routing for wireless sensor network
Wen Guang-jun · Journal of Computer Applications · 2008
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,directed-random-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.