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cs.LG2025

FusionDP: Foundation Model-Assisted Differentially Private Learning for Partially Sensitive Features

Linghui Zeng, Ruixuan Liu, Atiquer Rahman Sarkar +3

Ensuring the privacy of sensitive training data is crucial in privacy-preserving machine learning. However, in practical scenarios, privacy protection may be required for only a su…

cs.CR2025

FedSGT: Exact Federated Unlearning via Sequential Group-based Training

Bokang Zhang, Hong Guan, Hong kyu Lee +3

Federated Learning (FL) enables collaborative, privacy-preserving model training, but supporting the "Right to be Forgotten" is especially challenging because data influences the m…

cs.CR2025

SnapAudit: Active Auditing of Differentially Private In-Context Learning via Snapshot-Based Simulation

Yuyang Xia, Ruixuan Liu, Li Xiong

In-context learning (ICL) allows LLMs to adapt to new tasks via a few demonstrations, but those demonstrations may contain sensitive data. Differentially private (DP) ICL mechanism…

cs.CL2025

Direct Token Optimization: A Self-contained Approach to Large Language Model Unlearning

Hong kyu Lee, Ruixuan Liu, Li Xiong

Machine unlearning is an emerging technique that removes the influence of a subset of training data (forget set) from a model without full retraining, with applications including p…

cs.CR2025

UniAud: A Unified Auditing Framework for High Auditing Power and Utility with One Training Run

Ruixuan Liu, Li Xiong

Differentially private (DP) optimization has been widely adopted as a standard approach to provide rigorous privacy guarantees for training datasets. DP auditing verifies whether a…

cs.CR2025

Privacy and Accuracy-Aware AI/ML Model Deduplication

Hong Guan, Lei Yu, Lixi Zhou +5

With the growing adoption of privacy-preserving machine learning algorithms, such as Differentially Private Stochastic Gradient Descent (DP-SGD), training or fine-tuning models on…

cs.LG2025

Tokens for Learning, Tokens for Unlearning: Mitigating Membership Inference Attacks in Large Language Models via Dual-Purpose Training

Toan Tran, Ruixuan Liu, Li Xiong

Large language models (LLMs) have become the backbone of modern natural language processing but pose privacy concerns about leaking sensitive training data. Membership inference at…