You can hide, but your periodic schedule can't

Minghua Ma, Kai Zhao, Kaixin Sui, Lei Xu, Yong Li, Dan Pei*

*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

The enterprise Wi-Fi networks enable the collection of large-scale users' trajectory datasets, which are highly desired for both research and commercial purposes. Meanwhile, releasing these mobility data also raises serious privacy concerns. A large body of work tries to achieve k-anonymity as the first step to solve the privacy problem and it has been qualitatively recognized that k-anonymity is still risky when the diversity of sensitive information in the k-anonymity set is low. However, there lacks a study that provides a quantitative understanding for trajectory data. In this work, we investigate the schedule-leakage risk for the first time, by presenting a large-scale measurement based analysis of the high schedule-leakage risk over sixteen weeks of trajectory data collected from Tsinghua University, a campus with 2,670 access points deployed in 111 buildings. Using this dataset, we recognize the high risk of the schedule-leakage, i.e., even when 4-anonymity is satisfied, 28% of individuals' schedules are totally disclosed, and 56% are partly disclosed.

Original languageEnglish
Title of host publication2017 IEEE/ACM 25th International Symposium on Quality of Service, IWQoS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509019830
DOIs
Publication statusPublished - 5 Jul 2017
Externally publishedYes
Event25th IEEE/ACM International Symposium on Quality of Service, IWQoS 2017 - Vilanova i la Geltru, Spain
Duration: 14 Jun 201716 Jun 2017

Publication series

Name2017 IEEE/ACM 25th International Symposium on Quality of Service, IWQoS 2017

Conference

Conference25th IEEE/ACM International Symposium on Quality of Service, IWQoS 2017
Country/TerritorySpain
CityVilanova i la Geltru
Period14/06/1716/06/17

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Ma, M., Zhao, K., Sui, K., Xu, L., Li, Y., & Pei, D. (2017). You can hide, but your periodic schedule can't. In 2017 IEEE/ACM 25th International Symposium on Quality of Service, IWQoS 2017 Article 7969154 (2017 IEEE/ACM 25th International Symposium on Quality of Service, IWQoS 2017). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IWQoS.2017.7969154