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IncogniSense: An anonymity-preserving reputation framework for participatory sensing applications

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5 Author(s)
Christin, D. ; Secure Mobile Networking Lab., Tech. Univ. Darmstadt, Darmstadt, Germany ; Rosskopf, C. ; Hollick, M. ; Martucci, L.A.
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Reputation systems rate the contributions to participatory sensing campaigns from each user by associating a reputation score. The reputation scores are used to weed out incorrect sensor readings. However, an adversary can deanonmyize the users even when they use pseudonyms by linking the reputation scores associated with multiple contributions. Since the contributed readings are usually annotated with spatiotemporal information, this poses a serious breach of privacy for the users. In this paper, we address this privacy threat by proposing a framework called IncogniSense. Our system utilizes periodic pseudonyms generated using blind signature and relies on reputation transfer between these pseudonyms. The reputation transfer process has an inherent trade-off between anonymity protection and loss in reputation. We investigate by means of extensive simulations several reputation cloaking schemes that address this tradeoff in different ways. Our system is robust against reputation corruption and a prototype implementation demonstrates that the associated overheads are minimal.

Published in:

Pervasive Computing and Communications (PerCom), 2012 IEEE International Conference on

Date of Conference:

19-23 March 2012

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