Search Results for author: Shun Takagi

Found 6 papers, 4 papers with code

ULDP-FL: Federated Learning with Across Silo User-Level Differential Privacy

1 code implementation23 Aug 2023 Fumiyuki Kato, Li Xiong, Shun Takagi, Yang Cao, Masatoshi Yoshikawa

In this study, we present Uldp-FL, a novel FL framework designed to guarantee user-level DP in cross-silo FL where a single user's data may belong to multiple silos.

Federated Learning

Network Shuffling: Privacy Amplification via Random Walks

no code implementations8 Apr 2022 Seng Pei Liew, Tsubasa Takahashi, Shun Takagi, Fumiyuki Kato, Yang Cao, Masatoshi Yoshikawa

However, introducing a centralized entity to the originally local privacy model loses some appeals of not having any centralized entity as in local differential privacy.

P3GM: Private High-Dimensional Data Release via Privacy Preserving Phased Generative Model

2 code implementations22 Jun 2020 Shun Takagi, Tsubasa Takahashi, Yang Cao, Masatoshi Yoshikawa

The state-of-the-art approach for this problem is to build a generative model under differential privacy, which offers a rigorous privacy guarantee.

Privacy Preserving

Differentially Private Variational Autoencoders with Term-wise Gradient Aggregation

no code implementations19 Jun 2020 Tsubasa Takahashi, Shun Takagi, Hajime Ono, Tatsuya Komatsu

This paper studies how to learn variational autoencoders with a variety of divergences under differential privacy constraints.

PGLP: Customizable and Rigorous Location Privacy through Policy Graph

3 code implementations4 May 2020 Yang Cao, Yonghui Xiao, Shun Takagi, Li Xiong, Masatoshi Yoshikawa, Yilin Shen, Jinfei Liu, Hongxia Jin, Xiaofeng Xu

Third, we design a private location trace release framework that pipelines the detection of location exposure, policy graph repair, and private trajectory release with customizable and rigorous location privacy.

Cryptography and Security Computers and Society

PANDA: Policy-aware Location Privacy for Epidemic Surveillance

3 code implementations1 May 2020 Yang Cao, Shun Takagi, Yonghui Xiao, Li Xiong, Masatoshi Yoshikawa

Our system has three primary functions for epidemic surveillance: location monitoring, epidemic analysis, and contact tracing.

Databases Cryptography and Security

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