The anonymization of location based queries through the generalization of spatio-temporal information has been proposed as a privacy preserving technique. We show that the presence of multiple concurrent requests, the repetition of similar requests by the same issuers, and the distribution of different service parameters in the requests can significantly affect the level of privacy obtained by current anonymity-based techniques. We provide a formal model of the privacy threat, and we propose an incremental defense technique based on a combination of anonymity and obfuscation. We show the effectiveness of this technique by means of an extensive experimental evaluation.
Preserving anonymity of recurrent location-based queries / D. Riboni, L. Pareschi, C. Bettini, S. Jajodia - In: Proceedings [of the] 16th international symposium on temporal representation and reasoning : Bressanone-Brixen, Italy, 23-25 July, 2009 / [a cura di] C. Lutz, J.-F. Raski. - Los Alamitos : IEEE Computer Society, 2009. - ISBN 9780769537276. - pp. 62-72 (( Intervento presentato al 16. convegno International Symposium on Temporal Representation and Reasoning tenutosi a Bressanone, Italy nel 2009 [10.1109/TIME.2009.8].
Preserving anonymity of recurrent location-based queries
D. RiboniPrimo
;C. BettiniPenultimo
;
2009
Abstract
The anonymization of location based queries through the generalization of spatio-temporal information has been proposed as a privacy preserving technique. We show that the presence of multiple concurrent requests, the repetition of similar requests by the same issuers, and the distribution of different service parameters in the requests can significantly affect the level of privacy obtained by current anonymity-based techniques. We provide a formal model of the privacy threat, and we propose an incremental defense technique based on a combination of anonymity and obfuscation. We show the effectiveness of this technique by means of an extensive experimental evaluation.Pubblicazioni consigliate
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