Caché: Caching location-enhanced content to improve user privacy

Shahriyar Amini, Janne Lindqvist, Jason Hong, Jialiu Lin, Eran Toch, Norman Sadeh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We present the design, implementation, and evaluation of Caché, a system that offers location privacy for certain classes of location-based applications. The core idea in Caché is to periodically pre-fetch potentially useful location-enhanced content well in advance. Applications then retrieve content from a local cache on the mobile device when it is needed. This approach allows an end-user to make use of location-enhanced content while only revealing to third-party content providers a large geographic region rather than a precise location. In this paper, we present an analysis that examines tradeoffs in terms of storage, bandwidth, and freshness of data. We then discuss the design and implementation of an Android service embodying these ideas. Finally, we provide two evaluations of Caché. One measures the performance of our approach with respect to privacy and mobile content availability using real-world mobility traces. The other focuses on our experiences using Caché to enhance user privacy in three open source Android applications.

Original languageEnglish
Title of host publicationMobiSys'11 - Compilation Proceedings of the 9th International Conference on Mobile Systems, Applications, and Services and Co-located Workshops
Pages197-209
Number of pages13
DOIs
StatePublished - 2011
Event9th International Conference on Mobile Systems, Applications, and Services, MobiSys'11 and Co-located Workshops - Bethesda, MD, United States
Duration: 28 Jun 20111 Jul 2011

Publication series

NameMobiSys'11 - Compilation Proceedings of the 9th International Conference on Mobile Systems, Applications and Services and Co-located Workshops

Conference

Conference9th International Conference on Mobile Systems, Applications, and Services, MobiSys'11 and Co-located Workshops
Country/TerritoryUnited States
CityBethesda, MD
Period28/06/111/07/11

Keywords

  • caching
  • disconnected operation
  • location privacy
  • location-aware applications
  • location-enhanced content

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