Abstract
With the wide application of location-based services, there is a huge amount of users’ spatial data generated by mobile devices every day. However, the data is left from mobile users and faced with leakage risk from adversaries or untrusted data receivers. Therefore, spatial data should be perturbed to satisfy local differential privacy (LDP), which is a strong privacy metric in the local setting. In this paper, we study the problem of designing a personalized mechanism satisfying LDP for spatial data. We first construct attack and defense for privacy of spatial data and give a novel privacy definition with LDP and users’ personalized requirements. We propose a personalized location privacy preservation mechanism for spatial data satisfying LDP. We demonstrate the optimal utility and privacy guarantee of our mechanism. We analyze the impact of the key parameters on data utility via the experiments over the real dataset.
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Acknowledgment
This research was partially supported by the National Key Research and Development Program of China (No. 2017YFB1400600).
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Wu, D. et al. (2020). A Personalized Preservation Mechanism Satisfying Local Differential Privacy in Location-Based Services. In: Yu, S., Mueller, P., Qian, J. (eds) Security and Privacy in Digital Economy. SPDE 2020. Communications in Computer and Information Science, vol 1268. Springer, Singapore. https://doi.org/10.1007/978-981-15-9129-7_12
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DOI: https://doi.org/10.1007/978-981-15-9129-7_12
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