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Large-scale generative models have shown impressive image-generation capabilities, propelled by massive data. However, this often inadvertently leads to the generation of harmful or inappropriate content and raises copyright concerns.…

机器学习 · 计算机科学 2025-03-11 Myeongseob Ko , Henry Li , Zhun Wang , Jonathan Patsenker , Jiachen T. Wang , Qinbin Li , Ming Jin , Dawn Song , Ruoxi Jia

Current unlearning methods for large language models usually rely on reverse optimization to reduce target token probabilities. However, this paradigm disrupts the subsequent tokens prediction, degrading model performance and linguistic…

计算与语言 · 计算机科学 2025-05-29 Haoming Xu , Ningyuan Zhao , Liming Yang , Sendong Zhao , Shumin Deng , Mengru Wang , Bryan Hooi , Nay Oo , Huajun Chen , Ningyu Zhang

Large Language Models (LLMs) have revolutionized content creation across digital platforms, offering unprecedented capabilities in natural language generation and understanding. These models enable beneficial applications such as content…

计算与语言 · 计算机科学 2025-08-14 Chi Zhang , Changjia Zhu , Junjie Xiong , Xiaoran Xu , Lingyao Li , Yao Liu , Zhuo Lu

Large language models (LLMs) aligned for safety often suffer from over-refusal, the tendency to reject seemingly toxic or benign prompts by misclassifying them as toxic. This behavior undermines models' helpfulness and restricts usability…

计算与语言 · 计算机科学 2026-03-05 Yuxiao Lu , Lin Xu , Yang Sun , Wenjun Li , Jie Shi

Large language models (LLMs) have recently revolutionized language processing tasks but have also brought ethical and legal issues. LLMs have a tendency to memorize potentially private or copyrighted information present in the training…

机器学习 · 计算机科学 2025-07-21 Tamim Al Mahmud , Najeeb Jebreel , Josep Domingo-Ferrer , David Sanchez

Large language models trained on web-scale data can memorize private or sensitive knowledge, raising significant privacy risks. Although some unlearning methods mitigate these risks, they remain vulnerable to "relearning" during subsequent…

机器学习 · 计算机科学 2026-03-05 Nakyeong Yang , Dong-Kyum Kim , Jea Kwon , Minsung Kim , Kyomin Jung , Meeyoung Cha

Robust unlearning is crucial for safely deploying large language models (LLMs) in environments where data privacy, model safety, and regulatory compliance must be ensured. Yet the task is inherently challenging, partly due to difficulties…

计算与语言 · 计算机科学 2025-11-11 Vineeth Dorna , Anmol Mekala , Wenlong Zhao , Andrew McCallum , Zachary C. Lipton , J. Zico Kolter , Pratyush Maini

As models are getting larger and are trained on increasing amounts of data, there has been an explosion of interest into how we can ``delete'' specific data points or behaviours from a trained model, after the fact. This goal has been…

LLMs trained on massive datasets may inadvertently acquire sensitive information such as personal details and potentially harmful content. This risk is further heightened in multimodal LLMs as they integrate information from multiple…

计算与语言 · 计算机科学 2025-05-06 Vaidehi Patil , Yi-Lin Sung , Peter Hase , Jie Peng , Tianlong Chen , Mohit Bansal

Recent advances in large reasoning models (LRMs) have enabled strong chain-of-thought (CoT) generation through test-time computation. While these multi-step reasoning capabilities represent a major milestone in language model performance,…

人工智能 · 计算机科学 2025-10-14 Changsheng Wang , Chongyu Fan , Yihua Zhang , Jinghan Jia , Dennis Wei , Parikshit Ram , Nathalie Baracaldo , Sijia Liu

We revisit the efficacy of several practical methods for approximate machine unlearning developed for large-scale deep learning. In addition to complying with data deletion requests, one often-cited potential application for unlearning…

机器学习 · 计算机科学 2026-01-16 Martin Pawelczyk , Jimmy Z. Di , Yiwei Lu , Gautam Kamath , Ayush Sekhari , Seth Neel

Large language models pretrained on extensive web corpora demonstrate remarkable performance across a wide range of downstream tasks. However, a growing concern is data contamination, where evaluation datasets may be contained in the…

计算与语言 · 计算机科学 2024-07-12 Medha Palavalli , Amanda Bertsch , Matthew R. Gormley

Recent generative large language models (LLMs) show remarkable performance in non-English languages, but when prompted in those languages they tend to express higher harmful social biases and toxicity levels. Prior work has shown that…

计算与语言 · 计算机科学 2025-06-03 Vera Neplenbroek , Arianna Bisazza , Raquel Fernández

Machine unlearning (MU) seeks to remove knowledge of specific data samples from trained models without the necessity for complete retraining, a task made challenging by the dual objectives of effective erasure of data and maintaining the…

机器学习 · 计算机科学 2024-07-16 Mark He Huang , Lin Geng Foo , Jun Liu

Large language models (LLMs) risk retaining unauthorized or sensitive information from their training data, which raises privacy concerns. LLM unlearning seeks to mitigate these risks by selectively removing specified data while maintaining…

计算与语言 · 计算机科学 2025-05-29 Hwan Chang , Hwanhee Lee

Pre-trained Large Language Models (LLMs) have demonstrated remarkable capabilities but also pose risks by learning and generating copyrighted material, leading to significant legal and ethical concerns. In a potential real-world scenario,…

计算与语言 · 计算机科学 2025-02-12 Guangyao Dou

Machine unlearning for security is studied in this context. Several spam email detection methods exist, each of which employs a different algorithm to detect undesired spam emails. But these models are vulnerable to attacks. Many attackers…

机器学习 · 计算机科学 2021-12-28 Nishchal Parne , Kyathi Puppaala , Nithish Bhupathi , Ripon Patgiri

Understanding and shaping the behaviour of Large Language Models (LLMs) is increasingly important as applications become more powerful and more frequently adopted. This paper introduces a machine unlearning method specifically designed for…

机器学习 · 计算机科学 2024-07-25 Nicholas Pochinkov , Nandi Schoots

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…

密码学与安全 · 计算机科学 2025-10-14 Shang Wang , Tianqing Zhu , Dayong Ye , Wanlei Zhou

Large Language Models (LLMs) can comply with harmful instructions, raising serious safety concerns despite their impressive capabilities. Recent work has leveraged probing-based approaches to study the separability of malicious and benign…

计算与语言 · 计算机科学 2025-12-16 Cheng Wang , Zeming Wei , Qin Liu , Muhao Chen