Search Results for author: Chi Hong

Found 7 papers, 0 papers with code

AGIC: Approximate Gradient Inversion Attack on Federated Learning

no code implementations28 Apr 2022 Jin Xu, Chi Hong, Jiyue Huang, Lydia Y. Chen, Jérémie Decouchant

Recent reconstruction attacks apply a gradient inversion optimization on the gradient update of a single minibatch to reconstruct the private data used by clients during training.

Federated Learning

MEGA: Model Stealing via Collaborative Generator-Substitute Networks

no code implementations31 Jan 2022 Chi Hong, Jiyue Huang, Lydia Y. Chen

However, they are all based on competing generator-substitute networks and hence encounter training instability. In this paper we propose a data-free model stealing frame-work, MEGA, which is based on collaborative generator-substitute networks and only requires the target model toprovide label prediction for synthetic query examples.

Confident Data-free Model Stealing for Black-box Adversarial Attacks

no code implementations29 Sep 2021 Chi Hong, Jiyue Huang, Lydia Y. Chen

Deep machine learning models are increasingly deployed in the wild, subject to adversarial attacks.

Is Shapley Value fair? Improving Client Selection for Mavericks in Federated Learning

no code implementations20 Jun 2021 Jiyue Huang, Chi Hong, Lydia Y. Chen, Stefanie Roos

Shapley Value is commonly adopted to measure and incentivize client participation in federated learning.

Federated Learning

End-to-End Learning from Noisy Crowd to Supervised Machine Learning Models

no code implementations13 Nov 2020 Taraneh Younesian, Chi Hong, Amirmasoud Ghiassi, Robert Birke, Lydia Y. Chen

Furthermore, relabeling only 10% of the data using the expert's results in over 90% classification accuracy with SVM.

BIG-bench Machine Learning

Online Label Aggregation: A Variational Bayesian Approach

no code implementations19 Jul 2018 Chi Hong, Amirmasoud Ghiassi, Yichi Zhou, Robert Birke, Lydia Y. Chen

Our evaluation results on various online scenarios show that BiLA can effectively infer the true labels, with an error rate reduction of at least 10 to 1. 5 percent points for synthetic and real-world datasets, respectively.

Bayesian Inference Stochastic Optimization

Generative Models for Learning from Crowds

no code implementations13 Jun 2017 Chi Hong

In this paper, we propose generative probabilistic models for label aggregation.

Variational Inference

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