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Issue No. 01 - January-February (2011 vol. 8)
ISSN: 1545-5971
pp: 13-27
Claudio A. Ardagna , University of Milan, Crema
Marco Cremonini , University of Milan, Crema
Sabrina De Capitani di Vimercati , University of Milan, Crema
Pierangela Samarati , University of Milan, Crema
The pervasive diffusion of mobile communication devices and the technical improvements of location techniques are fostering the development of new applications that use the physical position of users to offer location-based services for business, social, or informational purposes. In such a context, privacy concerns are increasing and call for sophisticated solutions able to guarantee different levels of location privacy to the users. In this paper, we address this problem and present a solution based on different obfuscation operators that, when used individually or in combination, protect the privacy of the location information of users. We also introduce an adversary model and provide an analysis of the proposed obfuscation operators to evaluate their robustness against adversaries aiming to reverse the obfuscation effects to retrieve a location that better approximates the location of the users. Finally, we present some experimental results that validate our solution.
Privacy, obfuscation techniques, location-based services.

S. De Capitani di Vimercati, C. A. Ardagna, P. Samarati and M. Cremonini, "An Obfuscation-Based Approach for Protecting Location Privacy," in IEEE Transactions on Dependable and Secure Computing, vol. 8, no. , pp. 13-27, 2009.
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