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Although Multimodal Large Language Models (MLLMs) have achieved remarkable progress across many domains, their training on large-scale multimodal datasets raises serious privacy concerns, making effective machine unlearning increasingly…

Artificial Intelligence · Computer Science 2026-05-08 Yuhang Wang , Wenjie Mei , Junkai Zhang , Guangyu He , Zhenxing Niu , Haichang Gao

Anonymity of both natural and legal persons in court rulings is a critical aspect of privacy protection in the European Union and Switzerland. With the advent of LLMs, concerns about large-scale re-identification of anonymized persons are…

Computation and Language · Computer Science 2024-05-21 Alex Nyffenegger , Matthias Stürmer , Joel Niklaus

Large Language Models (LLMs) have become integral to numerous domains, significantly advancing applications in data management, mining, and analysis. Their profound capabilities in processing and interpreting complex language data, however,…

Cryptography and Security · Computer Science 2024-09-09 Qinbin Li , Junyuan Hong , Chulin Xie , Jeffrey Tan , Rachel Xin , Junyi Hou , Xavier Yin , Zhun Wang , Dan Hendrycks , Zhangyang Wang , Bo Li , Bingsheng He , Dawn Song

Machine unlearning, a novel area within artificial intelligence, focuses on addressing the challenge of selectively forgetting or reducing undesirable knowledge or behaviors in machine learning models, particularly in the context of large…

Computation and Language · Computer Science 2024-05-27 Saaketh Koundinya Gundavarapu , Shreya Agarwal , Arushi Arora , Chandana Thimmalapura Jagadeeshaiah

With the increasing use of cloud-based services for training and deploying machine learning models, data privacy has become a major concern. This is particularly important for natural language processing (NLP) models, which often process…

Computation and Language · Computer Science 2023-05-08 Davut Emre Tasar , Ceren Ocal Tasar

Recent privacy research on large language models (LLMs) has shown that they achieve near-human-level performance at inferring personal data from online texts. With ever-increasing model capabilities, existing text anonymization methods are…

Artificial Intelligence · Computer Science 2025-02-04 Robin Staab , Mark Vero , Mislav Balunović , Martin Vechev

Federated learning (FL) enhances privacy by keeping user data on local devices. However, emerging attacks have demonstrated that the updates shared by users during training can reveal significant information about their data. This has…

Driven by privacy protection laws and regulations, unlearning in Large Language Models (LLMs) is gaining increasing attention. However, current research often neglects the interpretability of the unlearning process, particularly concerning…

Machine Learning · Computer Science 2025-04-10 Xiaohua Feng , Yuyuan Li , Chengye Wang , Junlin Liu , Li Zhang , Chaochao Chen

Unlearning in large language models (LLMs) aims to remove specified data, but its efficacy is typically assessed with task-level metrics like accuracy and perplexity. We show that these metrics can be misleading, as models can appear to…

Computation and Language · Computer Science 2026-05-19 Xiaoyu Xu , Xiang Yue , Yang Liu , Qingqing Ye , Huadi Zheng , Peizhao Hu , Minxin Du , Haibo Hu

The advent of Large Language Models (LLMs) has revolutionized natural language processing, enabling advanced understanding and reasoning capabilities across a variety of tasks. Fine-tuning these models for specific domains, particularly…

Artificial Intelligence · Computer Science 2025-04-21 Chenlu Ding , Jiancan Wu , Yancheng Yuan , Jinda Lu , Kai Zhang , Alex Su , Xiang Wang , Xiangnan He

Data augmentation is widely used to mitigate data bias in the training dataset. However, data augmentation exposes machine learning models to privacy attacks, such as membership inference attacks. In this paper, we propose an effective…

Machine Learning · Computer Science 2024-04-23 Zhixin Pan , Emma Andrews , Laura Chang , Prabhat Mishra

Privacy preservation remains a key challenge in data mining and Natural Language Understanding (NLU). Previous research shows that the input text or even text embeddings can leak private information. This concern motivates our research on…

Computation and Language · Computer Science 2021-08-23 Chen Qu , Weize Kong , Liu Yang , Mingyang Zhang , Michael Bendersky , Marc Najork

With the passage of the Right to Be Forgotten (RTBF) regulations and the scaling up of language model training datasets, research on model unlearning in large language models (LLMs) has become more crucial. Before the era of LLMs, machine…

Computation and Language · Computer Science 2024-06-05 Bichen Wang , Yuzhe Zi , Yixin Sun , Yanyan Zhao , Bing Qin

Large Language Models (LLMs), now a foundation in advancing natural language processing, power applications such as text generation, machine translation, and conversational systems. Despite their transformative potential, these models…

Cryptography and Security · Computer Science 2025-08-05 Kang Chen , Xiuze Zhou , Yuanguo Lin , Jinhe Su , Yuanhui Yu , Li Shen , Fan Lin

Machine unlearning (MU) has emerged as a key mechanism for ensuring data privacy and regulatory compliance by enabling models to forget specific training samples. However, recent studies have shown that the removal of data can inadvertently…

Cryptography and Security · Computer Science 2026-05-05 Jie Fu , Nima Naderloui , Da Zhong , Yuan Hong , Wendy Hui Wang

This study reveals a previously unexplored vulnerability in the safety alignment of Large Language Models (LLMs). Existing aligned LLMs predominantly respond to unsafe queries with refusals, which often begin with a fixed set of prefixes…

Cryptography and Security · Computer Science 2026-01-28 Yangyang Guo , Ziwei Xu , Si Liu , Zhiming Zheng , Mohan Kankanhalli

Over the last year, significant advancements have been made in the realms of large language models (LLMs) and multi-modal large language models (MLLMs), particularly in their application to autonomous driving. These models have showcased…

Robotics · Computer Science 2024-06-11 Xiangrui Kong , Thomas Braunl , Marco Fahmi , Yue Wang

Deep learning (DL) models for natural language processing (NLP) tasks often handle private data, demanding protection against breaches and disclosures. Data protection laws, such as the European Union's General Data Protection Regulation…

Computation and Language · Computer Science 2022-05-23 Samuel Sousa , Roman Kern

Unlearning in large language models (LLMs) aims to remove harmful training data while preserving overall utility. However, we find that existing methods often hallucinate, generate abnormal token sequences, or behave inconsistently, raising…

Machine Learning · Computer Science 2026-05-12 Renjie Gu , Jiazhen Du , Yihua Zhang , Sijia Liu

Retrieval-augmented generation (RAG) is a powerful technique to facilitate language model with proprietary and private data, where data privacy is a pivotal concern. Whereas extensive research has demonstrated the privacy risks of large…

Cryptography and Security · Computer Science 2024-03-03 Shenglai Zeng , Jiankun Zhang , Pengfei He , Yue Xing , Yiding Liu , Han Xu , Jie Ren , Shuaiqiang Wang , Dawei Yin , Yi Chang , Jiliang Tang