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Capturing Privacy-preserving User Contexts with IndoorHash

Lakhdar Meftah 1 Romain Rouvoy 1, 2 Isabelle Chrisment 3
1 SPIRALS - Self-adaptation for distributed services and large software systems
Inria Lille - Nord Europe, CRIStAL - Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189
3 RESIST - Resilience and Elasticity for Security and ScalabiliTy of dynamic networked systems
Inria Nancy - Grand Est, LORIA - NSS - Department of Networks, Systems and Services
Abstract : IoT devices are ubiquitous and widely adopted by end-users to gather personal and environmental data that often need to be put into context in order to gain insights. In particular, location is often a critical context information that is required by third parties in order to analyse such data at scale. However, sharing this information is i) sensitive for the user privacy and ii) hard to capture when considering indoor environments. This paper therefore addresses the challenge of producing a new location hash, named IndoorHash, that captures the indoor location of a user, without disclosing the physical coordinates, thus preserving their privacy. This location hash leverages surrounding infrastructure, such as WiFi access points, to compute a key that uniquely identifies an indoor location. Location hashes are only known from users physically visiting these locations, thus enabling a new generation of privacy-preserving crowdsourcing mobile applications that protect from third parties re-identification attacks. We validate our results with a crowdsourcing campaign of 30 mobile devices during 4 weeks of data collection.
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https://hal.inria.fr/hal-02541391
Contributor : Romain Rouvoy <>
Submitted on : Tuesday, June 23, 2020 - 8:24:29 PM
Last modification on : Monday, December 14, 2020 - 5:38:27 PM

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Lakhdar Meftah, Romain Rouvoy, Isabelle Chrisment. Capturing Privacy-preserving User Contexts with IndoorHash. DAIS 2020 - 20th IFIP International Conference on Distributed Applications and Interoperable Systems, Jun 2020, Valletta, Malta. ⟨10.1007/978-3-030-50323-9_2⟩. ⟨hal-02541391⟩

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