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The increasing parameters and expansive dataset of large language models (LLMs) highlight the urgent demand for a technical solution to audit the underlying privacy risks and copyright issues associated with LLMs. Existing studies have…

Computation and Language · Computer Science 2024-12-30 Wenjie Fu , Huandong Wang , Chen Gao , Guanghua Liu , Yong Li , Tao Jiang

The growing use of large language models in sensitive domains has exposed a critical weakness: the inability to ensure that private information can be permanently forgotten. Yet these systems still lack reliable mechanisms to guarantee that…

Machine Learning · Computer Science 2025-11-14 James Jin Kang , Dang Bui , Thanh Pham , Huo-Chong Ling

Mitigating bias in language models (LMs) has become a critical problem due to the widespread deployment of LMs. Numerous approaches revolve around data pre-processing and fine-tuning of language models, tasks that can be both time-consuming…

Computation and Language · Computer Science 2024-06-21 Omkar Dige , Diljot Singh , Tsz Fung Yau , Qixuan Zhang , Borna Bolandraftar , Xiaodan Zhu , Faiza Khan Khattak

Machine Unlearning aims to remove specific data from trained models, addressing growing privacy and ethical concerns. We provide a theoretical analysis of a simple and widely used method - gradient ascent - used to reverse the influence of…

Machine Learning · Computer Science 2025-10-17 Odelia Melamed , Gilad Yehudai , Gal Vardi

Recent breakthroughs in Large Language Models (LLMs) have revealed remarkable generative capabilities and emerging self-regulatory mechanisms, including self-correction and self-rewarding. However, current detoxification techniques rarely…

Computation and Language · Computer Science 2026-01-21 Kaituo Zhang , Zhimeng Jiang , Na Zou

Large language models (LLMs) can internalize private or harmful content, motivating unlearning that removes a forget set while preserving retaining knowledge. However, forgetting updates often cause collateral degradation on retaining…

Machine Learning · Computer Science 2026-02-03 Duo Zhou , Yuji Zhang , Tianxin Wei , Ruizhong Qiu , Ke Yang , Xiao Lin , Cheng Qian , Jingrui He , Hanghang Tong , Chengxiang Zhai , Heng Ji , Huan Zhang

Large Language Models (LLMs) have demonstrated great potential as generalist assistants, showcasing powerful task understanding and problem-solving capabilities. To deploy LLMs as AI assistants, it is crucial that these models exhibit…

Artificial Intelligence · Computer Science 2025-02-12 Huanqian Wang , Yang Yue , Rui Lu , Jingxin Shi , Andrew Zhao , Shenzhi Wang , Shiji Song , Gao Huang

When introducing Large Language Models (LLMs) into industrial applications, such as healthcare and education, the risk of generating harmful content becomes a significant challenge. While existing machine unlearning methods can erase…

Computation and Language · Computer Science 2026-04-08 Mutsumi Sasaki , Kouta Nakayama , Yusuke Miyao , Yohei Oseki , Masaru Isonuma

Despite the strong capabilities of Large Language Models (LLMs) to acquire knowledge from their training corpora, the memorization of sensitive information in the corpora such as copyrighted, biased, and private content has led to ethical…

Computation and Language · Computer Science 2025-05-29 James Y. Huang , Wenxuan Zhou , Fei Wang , Fred Morstatter , Sheng Zhang , Hoifung Poon , Muhao Chen

Machine Unlearning (MU) technology facilitates the removal of the influence of specific data instances from trained models on request. Despite rapid advancements in MU technology, its vulnerabilities are still underexplored, posing…

Machine Learning · Computer Science 2025-06-25 Zhihao Sui , Liang Hu , Jian Cao , Dora D. Liu , Usman Naseem , Zhongyuan Lai , Qi Zhang

Our goal is to understand how post-training methods, such as fine-tuning, alignment, and unlearning, modify language model behavior and representations. We are particularly interested in the brittle nature of these modifications that makes…

Machine Learning · Computer Science 2025-05-15 Timothy Qian , Vinith Suriyakumar , Ashia Wilson , Dylan Hadfield-Menell

The deployment of large language models (LLMs) like ChatGPT and Gemini has shown their powerful natural language generation capabilities. However, these models can inadvertently learn and retain sensitive information and harmful content…

Cryptography and Security · Computer Science 2025-10-14 Shang Wang , Tianqing Zhu , Dayong Ye , Wanlei Zhou

Recent years have witnessed the emergence of a new paradigm of building natural language processing (NLP) systems: general-purpose, pre-trained language models (LMs) are composed with simple downstream models and fine-tuned for a variety of…

Cryptography and Security · Computer Science 2021-03-12 Xinyang Zhang , Zheng Zhang , Shouling Ji , Ting Wang

Multimodal Large Language Models (MLLMs) trained on massive data may memorize sensitive personal information and photos, posing serious privacy risks. To mitigate this, MLLM unlearning methods are proposed, which fine-tune MLLMs to reduce…

Machine Learning · Computer Science 2025-09-23 Xianren Zhang , Hui Liu , Delvin Ce Zhang , Xianfeng Tang , Qi He , Dongwon Lee , Suhang Wang

Large Language Models (LLMs) are prone to memorizing training data, which poses serious privacy risks. Two of the most prominent concerns are training data extraction and Membership Inference Attacks (MIAs). Prior research has shown that…

Machine Learning · Computer Science 2026-03-02 Ali Al Sahili , Ali Chehab , Razane Tajeddine

Unlearning in large language models (LLMs) involves precisely removing specific information from a pre-trained model. This is crucial to ensure safety of LLMs by deleting private data or harmful knowledge acquired during pre-training.…

Machine Learning · Computer Science 2025-09-04 Naman Deep Singh , Maximilian Müller , Francesco Croce , Matthias Hein

Large Language Models (LLMs) face significant challenges in maintaining privacy, ethics, and compliance, when sensitive or obsolete data must be selectively removed. Retraining these models from scratch is computationally infeasible,…

Computation and Language · Computer Science 2025-03-10 Dinesh Srivasthav P , Bala Mallikarjunarao Garlapati

Large language models (LLMs) are trained using massive datasets, which often contain undesirable content such as harmful texts, personal information, and copyrighted material. To address this, machine unlearning aims to remove information…

Computation and Language · Computer Science 2025-09-09 Haokun Chen , Sebastian Szyller , Weilin Xu , Nageen Himayat

Model pruning, i.e., removing a subset of model weights, has become a prominent approach to reducing the memory footprint of large language models (LLMs) during inference. Notably, popular inference engines, such as vLLM, enable users to…

Machine Learning · Computer Science 2026-04-07 Kazuki Egashira , Robin Staab , Thibaud Gloaguen , Mark Vero , Martin Vechev

Machine unlearning, which selectively removes harmful knowledge from a pre-trained model without retraining from scratch, is crucial for addressing privacy, regulatory compliance, and ethical concerns in Large Language Models (LLMs).…

Machine Learning · Computer Science 2025-11-25 Feng Guo , Yuntao Wen , Shen Gao , Junshuo Zhang , Shuo Shang