Search Results for author: Wanrong Zhang

Found 10 papers, 5 papers with code

Membership Inference Attacks and Privacy in Topic Modeling

1 code implementation7 Mar 2024 Nico Manzonelli, Wanrong Zhang, Salil Vadhan

Recent research shows that large language models are susceptible to privacy attacks that infer aspects of the training data.

Topic Models

DP-Fast MH: Private, Fast, and Accurate Metropolis-Hastings for Large-Scale Bayesian Inference

1 code implementation10 Mar 2023 Wanrong Zhang, Ruqi Zhang

In this paper, we study Metropolis-Hastings (MH), one of the most fundamental MCMC methods, for large-scale Bayesian inference under differential privacy.

Bayesian Inference Medical Diagnosis +1

Private Sequential Hypothesis Testing for Statisticians: Privacy, Error Rates, and Sample Size

no code implementations10 Apr 2022 Wanrong Zhang, Yajun Mei, Rachel Cummings

We also empirically validate our theoretical results on several synthetic databases, showing that our algorithms also perform well in practice.

Bandit Change-Point Detection for Real-Time Monitoring High-Dimensional Data Under Sampling Control

no code implementations24 Sep 2020 Wanrong Zhang, Yajun Mei

In many real-world problems of real-time monitoring high-dimensional streaming data, one wants to detect an undesired event or change quickly once it occurs, but under the sampling control constraint in the sense that one might be able to only observe or use selected components data for decision-making per time step in the resource-constrained environments.

Change Point Detection Computational Efficiency +2

Attribute Privacy: Framework and Mechanisms

no code implementations8 Sep 2020 Wanrong Zhang, Olga Ohrimenko, Rachel Cummings

We propose definitions to capture \emph{attribute privacy} in two relevant cases where global attributes may need to be protected: (1) properties of a specific dataset and (2) parameters of the underlying distribution from which dataset is sampled.

Attribute

Leakage of Dataset Properties in Multi-Party Machine Learning

1 code implementation12 Jun 2020 Wanrong Zhang, Shruti Tople, Olga Ohrimenko

Using multiple machine learning models, we show that leakage occurs even if the sensitive attribute is not included in the training data and has a low correlation with other attributes or the target variable.

Attribute BIG-bench Machine Learning

PAPRIKA: Private Online False Discovery Rate Control

1 code implementation27 Feb 2020 Wanrong Zhang, Gautam Kamath, Rachel Cummings

In this work, we study False Discovery Rate (FDR) control in multiple hypothesis testing under the constraint of differential privacy for the sample.

Two-sample testing

Privately detecting changes in unknown distributions

no code implementations ICML 2020 Rachel Cummings, Sara Krehbiel, Yuliia Lut, Wanrong Zhang

Much of the prior work on change-point detection---including the only private algorithms for this problem---requires complete knowledge of the pre-change and post-change distributions.

Change Point Detection

Differentially Private Change-Point Detection

no code implementations NeurIPS 2018 Rachel Cummings, Sara Krehbiel, Yajun Mei, Rui Tuo, Wanrong Zhang

The change-point detection problem seeks to identify distributional changes at an unknown change-point k* in a stream of data.

Change Point Detection Fault Detection

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