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Large Language Models (LLMs) trained on extensive corpora inevitably retain sensitive data, such as personal privacy information and copyrighted material. Recent advancements in knowledge unlearning involve updating LLM parameters to erase…

Computation and Language · Computer Science 2024-10-08 Bozhong Tian , Xiaozhuan Liang , Siyuan Cheng , Qingbin Liu , Mengru Wang , Dianbo Sui , Xi Chen , Huajun Chen , Ningyu Zhang

Large Language Model (LLM) unlearning has recently gained significant attention, driven by the need to remove unwanted information, such as private, sensitive, or copyrighted content, from LLMs. However, conventional unlearning approaches…

Computation and Language · Computer Science 2025-06-03 Yixin Wan , Anil Ramakrishna , Kai-Wei Chang , Volkan Cevher , Rahul Gupta

This study investigates the machine unlearning techniques within the context of large language models (LLMs), referred to as \textit{LLM unlearning}. LLM unlearning offers a principled approach to removing the influence of undesirable data…

Computation and Language · Computer Science 2025-06-03 Jiahui Geng , Qing Li , Herbert Woisetschlaeger , Zongxiong Chen , Fengyu Cai , Yuxia Wang , Preslav Nakov , Hans-Arno Jacobsen , Fakhri Karray

Large Reasoning Models (LRMs) generate structured chains of thought (CoTs) before producing final answers, making them especially vulnerable to knowledge leakage through intermediate reasoning steps. Yet, the memorization of sensitive…

Artificial Intelligence · Computer Science 2026-04-07 Tuan Le , Wei Qian , Mengdi Huai

Large Language Models (LLMs) inevitably acquire harmful information during training on massive datasets. LLM unlearning aims to eliminate the influence of such harmful information while maintaining the model's overall performance. Existing…

Computation and Language · Computer Science 2025-03-07 Wenyu Wang , Mengqi Zhang , Xiaotian Ye , Zhaochun Ren , Zhumin Chen , Pengjie Ren

Machine unlearning has emerged as an important component in developing safe and trustworthy models. Prior work on fact unlearning in LLMs has mostly focused on removing a specified target fact robustly, but often overlooks its deductive…

Computation and Language · Computer Science 2025-11-13 Ruihan Wu , Chhavi Yadav , Russ Salakhutdinov , Kamalika Chaudhuri

In current AI era, users may request AI companies to delete their data from the training dataset due to the privacy concerns. As a model owner, retraining a model will consume significant computational resources. Therefore, machine…

Machine Learning · Computer Science 2024-05-27 Wenhan Chang , Tianqing Zhu , Heng Xu , Wenjian Liu , Wanlei Zhou

Large language model unlearning has garnered increasing attention due to its potential to address security and privacy concerns, leading to extensive research in the field. However, much of this research has concentrated on instance-level…

Computation and Language · Computer Science 2025-05-20 Weitao Ma , Xiaocheng Feng , Weihong Zhong , Lei Huang , Yangfan Ye , Xiachong Feng , Bing Qin

Machine unlearning techniques aim to mitigate unintended memorization in large language models (LLMs). However, existing approaches predominantly focus on the explicit removal of isolated facts, often overlooking latent inferential…

Large Language Models (LLMs) demonstrate remarkable capabilities, but their training on massive corpora poses significant risks from memorized sensitive information. To mitigate these issues and align with legal standards, unlearning has…

Computation and Language · Computer Science 2025-11-18 Ruichen Qiu , Jiajun Tan , Jiayue Pu , Honglin Wang , Xiao-Shan Gao , Fei Sun

The undesired memorization of sensitive information by Large Language Models (LLMs) has emphasized the need for safety mechanisms that can regulate model behavior. This has led to the development of machine unlearning techniques that enable…

Machine Learning · Computer Science 2025-10-10 Anu Agarwal , Mihir Pamnani , Dilek Hakkani-Tur

As large language models (LLMs) are increasingly deployed across various applications, privacy and copyright concerns have heightened the need for more effective LLM unlearning techniques. Many existing unlearning methods aim to suppress…

Computation and Language · Computer Science 2025-09-22 Tomoya Yamashita , Akira Ito , Yuuki Yamanaka , Masanori Yamada , Takayuki Miura , Toshiki Shibahara

The task of "unlearning" certain concepts in large language models (LLMs) has attracted immense attention recently, due to its importance in mitigating undesirable model behaviours, such as the generation of harmful, private, or incorrect…

Computation and Language · Computer Science 2025-09-03 Yihuai Hong , Lei Yu , Haiqin Yang , Shauli Ravfogel , Mor Geva

As large language models (LLMs) are trained on massive datasets, they have raised significant privacy and ethical concerns due to their potential to inadvertently retain sensitive information. Unlearning seeks to selectively remove specific…

Computation and Language · Computer Science 2025-06-17 Philipp Spohn , Leander Girrbach , Jessica Bader , Zeynep Akata

Large Language Models (LLMs) are foundational to AI advancements, facilitating applications like predictive text generation. Nonetheless, they pose risks by potentially memorizing and disseminating sensitive, biased, or copyrighted…

Artificial Intelligence · Computer Science 2024-03-26 Youyang Qu , Ming Ding , Nan Sun , Kanchana Thilakarathna , Tianqing Zhu , Dusit Niyato

As Large Language Models (LLMs) demonstrate extensive capability in learning from documents, LLM unlearning becomes an increasingly important research area to address concerns of LLMs in terms of privacy, copyright, etc. A conventional LLM…

Computation and Language · Computer Science 2024-06-14 Jiabao Ji , Yujian Liu , Yang Zhang , Gaowen Liu , Ramana Rao Kompella , Sijia Liu , Shiyu Chang

Machine unlearning, the study of efficiently removing the impact of specific training instances on a model, has garnered increased attention in recent years due to regulatory guidelines such as the \emph{Right to be Forgotten}. Achieving…

Machine Learning · Computer Science 2024-06-07 Martin Pawelczyk , Seth Neel , Himabindu Lakkaraju

Large language models (LLMs) have shown remarkable proficiency in generating text, benefiting from extensive training on vast textual corpora. However, LLMs may also acquire unwanted behaviors from the diverse and sensitive nature of their…

Computation and Language · Computer Science 2025-03-24 Zhiwei Zhang , Fali Wang , Xiaomin Li , Zongyu Wu , Xianfeng Tang , Hui Liu , Qi He , Wenpeng Yin , Suhang Wang

Unlearning aims to remove copyrighted, sensitive, or private content from large language models (LLMs) without a full retraining. In this work, we develop a multi-task unlearning benchmark (LUME) which features three tasks: (1) unlearn…

Computation and Language · Computer Science 2025-02-28 Anil Ramakrishna , Yixin Wan , Xiaomeng Jin , Kai-Wei Chang , Zhiqi Bu , Bhanukiran Vinzamuri , Volkan Cevher , Mingyi Hong , Rahul Gupta

Although Large Language Models (LLMs) have demonstrated impressive capabilities across a wide range of tasks, growing concerns have emerged over the misuse of sensitive, copyrighted, or harmful data during training. To address these…

Cryptography and Security · Computer Science 2025-06-03 Jie Ren , Zhenwei Dai , Xianfeng Tang , Yue Xing , Shenglai Zeng , Hui Liu , Jingying Zeng , Qiankun Peng , Samarth Varshney , Suhang Wang , Qi He , Charu C. Aggarwal , Hui Liu