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cs.DB2023
Efficient and Accurate Range Counting on Privacy-preserving Spatial Data Federation [Technical Report]
Maocheng Li, Yuxiang Zeng, Lei Chen
A spatial data federation is a collection of data owners (e.g., a consortium of taxi companies), and collectively it could provide better location-based services (LBS). For example…
cs.DB2023
Accurate and Efficient Trajectory-based Contact Tracing with Secure Computation and Geo-Indistinguishability
Maocheng Li, Yuxiang Zeng, Libin Zheng +2
Contact tracing has been considered as an effective measure to limit the transmission of infectious disease such as COVID-19. Trajectory-based contact tracing compares the trajecto…