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Fine-tuning enables large language models (LLMs) to adapt to specific domains, but often compromises their previously established safety alignment. To mitigate the degradation of model safety during fine-tuning, we introduce LookAhead…

计算与语言 · 计算机科学 2025-12-22 Kangwei Liu , Mengru Wang , Yujie Luo , Lin Yuan , Mengshu Sun , Lei Liang , Zhiqiang Zhang , Jun Zhou , Bryan Hooi , Shumin Deng

Large Language Models (LLMs) have transformed natural language processing (NLP) by enabling robust text generation and understanding. However, their deployment in sensitive domains like healthcare, finance, and legal services raises…

人工智能 · 计算机科学 2024-12-09 Georgios Feretzakis , Vassilios S. Verykios

Despite extensive efforts to align Large Language Models (LLMs) with human values and safety rules, jailbreak attacks that exploit certain vulnerabilities continuously emerge, highlighting the need to strengthen existing LLMs with…

机器学习 · 计算机科学 2025-09-30 Xuekang Wang , Shengyu Zhu , Xueqi Cheng

Large language models are shown to present privacy risks through memorization of training data, and several recent works have studied such risks for the pre-training phase. Little attention, however, has been given to the fine-tuning phase…

计算与语言 · 计算机科学 2022-11-07 Fatemehsadat Mireshghallah , Archit Uniyal , Tianhao Wang , David Evans , Taylor Berg-Kirkpatrick

Natural language processing (NLP) models have become increasingly popular in real-world applications, such as text classification. However, they are vulnerable to privacy attacks, including data reconstruction attacks that aim to extract…

计算与语言 · 计算机科学 2023-06-27 Adel Elmahdy , Ahmed Salem

Recent advancements in pre-trained large language models (LLMs) have significantly influenced various domains. Adapting these models for specific tasks often involves fine-tuning (FT) with private, domain-specific data. However, privacy…

密码学与安全 · 计算机科学 2024-12-11 Guanzhong Chen , Zhenghan Qin , Mingxin Yang , Yajie Zhou , Tao Fan , Tianyu Du , Zenglin Xu

The pretraining and fine-tuning approach has become the leading technique for various NLP applications. However, recent studies reveal that fine-tuning data, due to their sensitive nature, domain-specific characteristics, and…

计算与语言 · 计算机科学 2024-11-13 Qian Sun , Hanpeng Wu , Xi Sheryl Zhang

Stealthy data poisoning during fine-tuning can backdoor large language models (LLMs), threatening downstream safety. Existing detectors either use classifier-style probability signals--ill-suited to generation--or rely on rewriting, which…

计算与语言 · 计算机科学 2025-11-13 Jinwen Chen , Hainan Zhang , Fei Sun , Qinnan Zhang , Sijia Wen , Ziwei Wang , Zhiming Zheng

Recently, the powerful large language models (LLMs) have been instrumental in propelling the progress of recommender systems (RS). However, while these systems have flourished, their susceptibility to security threats has been largely…

计算与语言 · 计算机科学 2024-06-06 Jinghao Zhang , Yuting Liu , Qiang Liu , Shu Wu , Guibing Guo , Liang Wang

Although it has been demonstrated that Natural Language Processing (NLP) algorithms are vulnerable to deliberate attacks, the question of whether such weaknesses can lead to software security threats is under-explored. To bridge this gap,…

计算与语言 · 计算机科学 2024-05-14 Xutan Peng , Yipeng Zhang , Jingfeng Yang , Mark Stevenson

Large language model fine-tuning techniques typically depend on extensive labeled data, external guidance, and feedback, such as human alignment, scalar rewards, and demonstration. However, in practical application, the scarcity of specific…

计算与语言 · 计算机科学 2024-12-31 Jia Liu , Yue Wang , Zhiqi Lin , Min Chen , Yixue Hao , Long Hu

Federated Learning (FL) offers a decentralized framework for training and fine-tuning Large Language Models (LLMs) by leveraging computational resources across organizations while keeping sensitive data on local devices. It addresses…

密码学与安全 · 计算机科学 2026-05-20 Md Jueal Mia , M. Hadi Amini

Large language models (LLMs) frequently memorize sensitive or personal information, raising significant privacy concerns. Existing variants of differential privacy stochastic gradient descent (DPSGD) inject uniform noise into every gradient…

机器学习 · 计算机科学 2025-09-30 Manjiang Yu , Priyanka Singh , Xue Li , Yang Cao

Federated learning (FL) addresses privacy and data-silo issues in the training of large language models (LLMs). Most prior work focuses on improving the efficiency of federated learning for LLMs (FedLLM). However, security in open federated…

密码学与安全 · 计算机科学 2026-04-21 Mingxiang Tao , Yu Tian , Wenxuan Tu , Yue Yang , Xue Yang , Xiangyan Tang

With the burgeoning advancements in the field of natural language processing (NLP), the demand for training data has increased significantly. To save costs, it has become common for users and businesses to outsource the labor-intensive task…

计算与语言 · 计算机科学 2024-08-22 Ziqiang Li , Yueqi Zeng , Pengfei Xia , Lei Liu , Zhangjie Fu , Bin Li

Fine-tuning large language models (LLMs) with local data is a widely adopted approach for organizations seeking to adapt LLMs to their specific domains. Given the shared characteristics in data across different organizations, the idea of…

机器学习 · 计算机科学 2025-09-26 Wenkai Guo , Xuefeng Liu , Haolin Wang , Jianwei Niu , Shaojie Tang , Jing Yuan

Large Language Models (LLMs) are known to memorize significant portions of their training data. Parts of this memorized content have been shown to be extractable by simply querying the model, which poses a privacy risk. We present a novel…

Recent studies have uncovered a troubling vulnerability in the fine-tuning stage of large language models (LLMs): even fine-tuning on entirely benign datasets can lead to a significant increase in the harmfulness of LLM outputs. Building on…

机器学习 · 计算机科学 2025-05-27 Zihan Guan , Mengxuan Hu , Ronghang Zhu , Sheng Li , Anil Vullikanti

Recent advancements in Large Language Models (LLMs) have sparked widespread concerns about their safety. Recent work demonstrates that safety alignment of LLMs can be easily removed by fine-tuning with a few adversarially chosen…

计算与语言 · 计算机科学 2025-03-03 Samuele Poppi , Zheng-Xin Yong , Yifei He , Bobbie Chern , Han Zhao , Aobo Yang , Jianfeng Chi

Reinforcement learning (RL) is a powerful tool for sequential decision-making, but its application is often hindered by privacy concerns arising from its interaction data. This challenge is particularly acute in advanced networked systems,…

机器学习 · 计算机科学 2025-11-18 Shaojie Bai , Mohammad Sadegh Talebi , Chengcheng Zhao , Peng Cheng , Jiming Chen