Research

Publications

International Conference / Journal

ULDP-FL: Federated Learning with Across Silo User-Level Differential Privacy
Fumiyuki Kato, Li Xiong, Shun Takagi, Yang Cao, Masatoshi Yoshikawa
2024 VLDB (CORE rank A*) [paper link] [code]

HRNet: Differentially Private Hierarchical and Multi-Resolution Network for Human Mobility Data Synthesization
Shun Takagi, Li Xiong, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2024 VLDB (CORE rank A*) [paper link] [code]

OLIVE: oblivious federated learning on trusted execution environment against the risk of sparsification
Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2023 VLDB (CORE rank A*) [paper link] [code]

From Bounded to Unbounded: Privacy Amplification via Shuffling with Dummies
Shun Takagi, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2023 IEEE CSF (CORE rank A) [paper link]

Asymmetric Differential Privacy
Shun Takagi, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2022 IEEE BigData (CORE rank B) [paper link]

An Accurate, Flexible and Private Trajectory-based Contact Tracing System
Ruixuan Cao, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2022 iiWAS (CORE rank C) [paper link]

HDPView: Differentially Private Materialized View for Exploring High Dimensional Relational Data
Fumiyuki Kato, Tsubasa Takahashi, Shun Takagi, Yang Cao, Seng Pei Liew, Masatoshi Yoshikawa
2022 VLDB (CORE rank A*) [paper link] [code]

Network Shuffling: Privacy Amplification via Random Walks
Seng Pei Liew, Tsubasa Takahashi, Shun Takagi, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2022 ACM SIGMOD (CORE rank A*) [paper link]

PCT-TEE: Trajectory-based Private Contact Tracing System with Trusted Execution Environment
Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2021 ACM Transactions on Spatial Algorithms and Systems [paper link] [code]

Preventing Manipulation Attack in Local Differential Privacy using Verifiable Randomization Mechanism
Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2021 DBSec (CORE rank B) [paper link] [code]

Secure and Efficient Trajectory-Based Contact Tracing using Trusted Hardware
Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa
2020 PSBD@IEEE BigData (CORE rank B) [paper link]

Blockchain-empowered Contact Tracing for COVID-19 Using Crypto-spatiotemporal Information
Zheng Wen, Keping Yu, Xin Qi, Toshio Sato, Yutaka Katsuyama,Takuro Sato, Wataru Kameyama, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa, Min Luo and Jun Hashimoto
2020 IEEE HEALTHCOM (CORE rank C) [paper link]