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Recent advances in Large Language Models (LLMs) have enabled them to overcome their context window limitations, and demonstrate exceptional retrieval and reasoning capacities on longer context. Quesion-answering systems augmented with…

Computation and Language · Computer Science 2024-11-19 Zixiong Wang , Gaoyang Liu , Yang Yang , Chen Wang

Direct Preference Optimization (DPO) has emerged as a promising approach for aligning large language models with human preferences. While prior work mainly extends DPO from the aspect of the objective function, we instead improve DPO from…

Machine Learning · Computer Science 2026-02-17 Xun Deng , Han Zhong , Rui Ai , Fuli Feng , Zheng Wang , Xiangnan He

A common technique for aligning large language models (LLMs) relies on acquiring human preferences by comparing multiple generations conditioned on a fixed context. This method, however, relies solely on pairwise comparisons, where the…

Computation and Language · Computer Science 2025-01-09 Hritik Bansal , Ashima Suvarna , Gantavya Bhatt , Nanyun Peng , Kai-Wei Chang , Aditya Grover

Membership Inference Attacks (MIAs) on pre-trained Large Language Models (LLMs) aim at determining if a data point was part of the model's training set. Prior MIAs that are built for classification models fail at LLMs, due to ignoring the…

Computation and Language · Computer Science 2025-09-17 Hongyan Chang , Ali Shahin Shamsabadi , Kleomenis Katevas , Hamed Haddadi , Reza Shokri

With the rise of large language models (LLMs), increasing research has recognized their risk of leaking personally identifiable information (PII) under malicious attacks. Although efforts have been made to protect PII in LLMs, existing…

Computation and Language · Computer Science 2025-03-12 Martin Kuo , Jingyang Zhang , Jianyi Zhang , Minxue Tang , Louis DiValentin , Aolin Ding , Jingwei Sun , William Chen , Amin Hass , Tianlong Chen , Yiran Chen , Hai Li

Machine learning (ML) models have been shown to be vulnerable to Membership Inference Attacks (MIA), which infer the membership of a given data point in the target dataset by observing the prediction output of the ML model. While the key…

Machine Learning · Computer Science 2020-07-28 Shakila Mahjabin Tonni , Dinusha Vatsalan , Farhad Farokhi , Dali Kaafar , Zhigang Lu , Gioacchino Tangari

Membership Inference Attacks (MIAs) aim to predict whether a data sample belongs to the model's training set or not. Although prior research has extensively explored MIAs in Large Language Models (LLMs), they typically require accessing to…

Cryptography and Security · Computer Science 2025-02-27 Yu He , Boheng Li , Liu Liu , Zhongjie Ba , Wei Dong , Yiming Li , Zhan Qin , Kui Ren , Chun Chen

Multi-Objective Alignment (MOA) aims to align LLMs' responses with multiple human preference objectives, with Direct Preference Optimization (DPO) emerging as a prominent approach. However, we find that DPO-based MOA approaches suffer from…

Machine Learning · Computer Science 2025-12-09 Moxin Li , Yuantao Zhang , Wenjie Wang , Wentao Shi , Zhuo Liu , Fuli Feng , Tat-Seng Chua

Large capacity machine learning (ML) models are prone to membership inference attacks (MIAs), which aim to infer whether the target sample is a member of the target model's training dataset. The serious privacy concerns due to the…

Machine Learning · Computer Science 2021-01-01 Virat Shejwalkar , Amir Houmansadr

General-purpose large language models (LLMs) have demonstrated remarkable generative and reasoning capabilities but remain limited in healthcare and caregiving applications due to two key deficiencies: factual unreliability and a lack of…

Computation and Language · Computer Science 2025-12-09 Emre Umucu , Guillermina Solis , Leon Garza , Emilia Rivas , Beatrice Lee , Anantaa Kotal , Aritran Piplai

Membership inference attacks (MIAs) aim to determine whether a data sample was included in a machine learning (ML) model's training set and have become the de facto standard for measuring privacy leakages in ML. We propose an evaluation…

Cryptography and Security · Computer Science 2026-03-25 Najeeb Jebreel , David Sánchez , Josep Domingo-Ferrer

As the capabilities of pre-trained large language models (LLMs) continue to advance, the "pre-train and fine-tune" paradigm has become increasingly mainstream, leading to the development of various fine-tuning methods. However, the privacy…

Computation and Language · Computer Science 2025-07-02 Jie Hou , Chuxiong Wu , Lannan Luo , Qiang Zeng

Large Language Models (LLMs) have recently demonstrated remarkable performance in generating high-quality tabular synthetic data. In practice, two primary approaches have emerged for adapting LLMs to tabular data generation: (i) fine-tuning…

Machine Learning · Computer Science 2026-05-12 Joshua Ward , Bochao Gu , Chi-Hua Wang , Guang Cheng

Membership inference attacks (MIAs), which enable adversaries to determine whether specific data points were part of a model's training dataset, have emerged as an important framework to understand, assess, and quantify the potential…

Cryptography and Security · Computer Science 2026-03-23 Toan Tran , Olivera Kotevska , Li Xiong

With the rapid advancement of large language models (LLMs), aligning policy models with human preferences has become increasingly critical. Direct Preference Optimization (DPO) has emerged as a promising approach for alignment, acting as an…

Artificial Intelligence · Computer Science 2025-07-15 Wenyi Xiao , Zechuan Wang , Leilei Gan , Shuai Zhao , Zongrui Li , Ruirui Lei , Wanggui He , Luu Anh Tuan , Long Chen , Hao Jiang , Zhou Zhao , Fei Wu

Membership inference attacks (MIAs) are widely used to assess the privacy risks associated with machine learning models. However, when these attacks are applied to pre-trained large language models (LLMs), they encounter significant…

Cryptography and Security · Computer Science 2026-05-26 Meng Tong , Yuntao Du , Kejiang Chen , Weiming Zhang , Ninghui Li

Machine learning models can leak private information about their training data. The standard methods to measure this privacy risk, based on membership inference attacks (MIAs), only check if a given data point \textit{exactly} matches a…

Machine Learning · Computer Science 2025-09-11 Jiashu Tao , Reza Shokri

Membership inference attack (MIA) poses a significant privacy threat in federated learning (FL) as it allows adversaries to determine whether a client's private dataset contains a specific data sample. While defenses against membership…

Machine Learning · Computer Science 2026-02-10 Quan Minh Nguyen , Min-Seon Kim , Hoang M. Ngo , Trong Nghia Hoang , Hyuk-Yoon Kwon , My T. Thai

As large language models (LLMs) become more capable, fine-tuning techniques for aligning with human intent are increasingly important. A key consideration for aligning these models is how to most effectively use human resources, or model…

Machine Learning · Computer Science 2024-07-01 William Muldrew , Peter Hayes , Mingtian Zhang , David Barber

Natural language processing models have experienced a significant upsurge in recent years, with numerous applications being built upon them. Many of these applications require fine-tuning generic base models on customized, proprietary…

Machine Learning · Computer Science 2024-03-14 Guy Amit , Abigail Goldsteen , Ariel Farkash
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