Proper

Abstract

The privacy of sensitive events observed by a sensor network needs to be protected. An adversary can track the trajectory of a moving object or determine the location of the occurrence of a critical event to breach its privacy. In this paper, we propose ring signature for obfuscating the spatial information. First, the extended region of location of an event of interest as estimated from a sensor communication is presented. Then, the increase in this region of spatial uncertainty due to the effect to the effect of ring signature is determined. We observe that ring signature can effectively enhance the region of location uncertainty of a sensed event. This can help in sustaining the privacy of the event of interest against a local or a global adversary. Finally, we evaluate the efficacy of our privacy enhancing strategy by finding its effect on delay and throughput of the sensor network.