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Longitude: A Privacy-Preserving Location Sharing Protocol for Mobile Applications

Abstract : Location sharing services are becoming increasingly popular. Although many location sharing services allow users to set up privacy policies to control who can access their location, the use made by service providers remains a source of concern. Ideally, location sharing providers and middleware should not be able to access users’ location data without their consent. In this paper, we propose a new location sharing protocol called Longitude that eases privacy concerns by making it possible to share a user’s location data blindly and allowing the user to control who can access her location, when and to what degree of precision. The underlying cryptographic algorithms are designed for GPS-enabled mobile phones. We describe and evaluate our implementation for the Nexus One Android mobile phone.
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Changyu Dong, Naranker Dulay. Longitude: A Privacy-Preserving Location Sharing Protocol for Mobile Applications. 5th International Conference on Trust Management (TM), Jun 2011, Copenhagen, Denmark. pp.133-148, ⟨10.1007/978-3-642-22200-9_12⟩. ⟨hal-01568690⟩

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