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The broadcast and tetherless nature of wireless networks and the widespread deployment of Wi-Fi hotspots makes it easy to remotely locate a user by observing her wireless signals. Location is private information and can be used by malicious individuals for blackmail, stalking, and other privacy violations. This paper analyzes the problem of location privacy in wireless networks and presents a protocol for improving location privacy. The basic approach is to obfuscate several types of privacy-compromising information revealed by a mobile node, including sender identity, time of transmission, and signal strength. The design is driven by real-system implementation and field experiments along with analysis and simulations.

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Format:PDFSize:277 KB
Date:Apr 2007
Pages:12

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