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We demonstrate a breach in smartphone location privacy through the accelerometer and magnetometer's footprints. The merits or otherwise of explicitly permissioned location sensors are not the point of this paper. Instead, our proposition is that other non-location-sensitive sensors can track users accurately when the users are in motion, as in travelling on public transport, such as trains, buses, and taxis. Through field trials, we provide evidence that high accuracy location tracking can be achieved even via non-location-sensitive sensors for which no access authorisation is required from users on a smartphone.
Original languageEnglish
Title of host publicationThe First Location Privacy Workshop (LPW 2019), the 14th International Conference on Availability, Reliability and Security (ARES 2019)
PublisherAssociation for Computing Machinery (ACM)
Number of pages9
ISBN (Electronic)978-1-4503-7164-3
Publication statusPublished - 26 Aug 2019


  • Location Privacy
  • Location Tracking
  • Mobile Sensors
  • Smartphones

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