A Distributed Query Protocol for Continuous Privacy Preserving in Wireless Sensor Networks

With the rapid proliferation of wireless sensor networks, data are becoming easily obtainable. While the information is very useful in many aspects, privacy concern is also becoming more challenging, especially when we face more and more serious security and privacy threats. In these privacy concerns, location privacy is a very interesting yet difficult issue. To date, existing research commonly focus on protecting the current location of objects only, yet, we found another privacy threat caused by the capability of inferring location by knowing previous location sequence, we call it the continuous privacy threat. In this paper, we design P-preserving, a new distributed protocol for continuous data collection with privacy preserving in sensor networks. In P-preserving, it integrates continuous privacy awareness algorithms into existing data collection framework, i.e., raw data collection and in-network processing. Extensive simulation results demonstrate the effectiveness of our P-preserving protocol.