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Large vision-language models (VLLMs) exhibit promising capabilities for processing multi-modal tasks across various application scenarios. However, their emergence also raises significant data security concerns, given the potential…

Computer Vision and Pattern Recognition · Computer Science 2024-11-06 Zhan Li , Yongtao Wu , Yihang Chen , Francesco Tonin , Elias Abad Rocamora , Volkan Cevher

The rise of Large Language Models (LLMs) has triggered legal and ethical concerns, especially regarding the unauthorized use of copyrighted materials in their training datasets. This has led to lawsuits against tech companies accused of…

Cryptography and Security · Computer Science 2025-01-17 Cédric Eichler , Nathan Champeil , Nicolas Anciaux , Alexandra Bensamoun , Heber Hwang Arcolezi , José Maria De Fuentes

In a membership inference attack (MIA), an attacker exploits the overconfidence exhibited by typical machine learning models to determine whether a specific data point was used to train a target model. In this paper, we analyze the…

Information Theory · Computer Science 2025-06-10 Meiyi Zhu , Caili Guo , Chunyan Feng , Osvaldo Simeone

Adapting Large Language Models (LLMs) to specific tasks introduces concerns about computational efficiency, prompting an exploration of efficient methods such as In-Context Learning (ICL). However, the vulnerability of ICL to privacy…

Cryptography and Security · Computer Science 2024-09-04 Rui Wen , Zheng Li , Michael Backes , Yang Zhang

Membership Inference Attacks (MIAs) determine whether a specific data point was included in the training set of a target model. In this paper, we introduce the Semantic Membership Inference Attack (SMIA), a novel approach that enhances MIA…

Machine Learning · Computer Science 2024-06-17 Hamid Mozaffari , Virendra J. Marathe

Vision-Language Models (VLMs), built on pre-trained vision encoders and large language models (LLMs), have shown exceptional multi-modal understanding and dialog capabilities, positioning them as catalysts for the next technological…

Cryptography and Security · Computer Science 2025-02-10 Yuke Hu , Zheng Li , Zhihao Liu , Yang Zhang , Zhan Qin , Kui Ren , Chun Chen

State-of-the-art membership inference attacks (MIAs) typically require training many reference models, making it difficult to scale these attacks to large pre-trained language models (LLMs). As a result, prior research has either relied on…

Machine learning models, in particular deep neural networks, are currently an integral part of various applications, from healthcare to finance. However, using sensitive data to train these models raises concerns about privacy and security.…

Cryptography and Security · Computer Science 2024-07-10 Haonan Shi , Tu Ouyang , An Wang

A Membership Inference Attack (MIA) assesses how much a trained machine learning model reveals about its training data by determining whether specific query instances were included in the dataset. We classify existing MIAs into adaptive or…

Cryptography and Security · Computer Science 2025-09-09 Yuntao Du , Jiacheng Li , Yuetian Chen , Kaiyuan Zhang , Zhizhen Yuan , Hanshen Xiao , Bruno Ribeiro , Ninghui Li

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

Membership Inference attacks (MIAs) aim to predict whether a data sample was present in the training data of a machine learning model or not, and are widely used for assessing the privacy risks of language models. Most existing attacks rely…

Computation and Language · Computer Science 2023-08-08 Justus Mattern , Fatemehsadat Mireshghallah , Zhijing Jin , Bernhard Schölkopf , Mrinmaya Sachan , Taylor Berg-Kirkpatrick

Membership inference attacks (MIAs) pose a critical privacy threat to fine-tuned large language models (LLMs), especially when models are adapted to domain-specific tasks using sensitive data. While prior black-box MIA techniques rely on…

Cryptography and Security · Computer Science 2025-12-23 Zhexi Lu , Hongliang Chi , Nathalie Baracaldo , Swanand Ravindra Kadhe , Yuseok Jeon , Lei Yu

The vulnerability of machine learning models to Membership Inference Attacks (MIAs) has garnered considerable attention in recent years. These attacks determine whether a data sample belongs to the model's training set or not. Recent…

Cryptography and Security · Computer Science 2024-09-05 Yu He , Boheng Li , Yao Wang , Mengda Yang , Juan Wang , Hongxin Hu , Xingyu Zhao

Large vision-language models (LVLMs) have demonstrated outstanding performance in many downstream tasks. However, LVLMs are trained on large-scale datasets, which can pose privacy risks if training images contain sensitive information.…

Computer Vision and Pattern Recognition · Computer Science 2026-02-05 Zongyu Wu , Minhua Lin , Zhiwei Zhang , Fali Wang , Xianren Zhang , Xiang Zhang , Suhang Wang

We present the first systematic Membership Inference Attack (MIA) evaluation of Large Audio Language Models (LALMs). As audio encodes non-semantic information, it induces severe train and test distribution shifts and can lead to spurious…

Sound · Computer Science 2026-03-31 Jia-Kai Dong , Yu-Xiang Lin , Hung-Yi Lee

Video large language models (VideoLLMs) are increasingly trained or instruction-tuned on large-scale video--text corpora collected from heterogeneous sources, raising an immediate privacy question: can an external auditor determine whether…

Cryptography and Security · Computer Science 2026-05-01 Wei Song , Yuxin Cao , Ziqi Ding , Yi Liu , Gelei Deng , Yuekang Li

Membership inference attack (MIA) has become one of the most widely used and effective methods for evaluating the privacy risks of machine learning models. These attacks aim to determine whether a specific sample is part of the model's…

Cryptography and Security · Computer Science 2025-06-04 Jing Xue , Zhishen Sun , Haishan Ye , Luo Luo , Xiangyu Chang , Ivor Tsang , Guang Dai

We propose Fast-MIA (https://github.com/Nikkei/fast-mia), a Python library for efficiently evaluating membership inference attacks (MIA) against large language models (LLMs). MIA has emerged as a crucial technique for auditing privacy risks…

Cryptography and Security · Computer Science 2026-05-12 Hiromu Takahashi , Shotaro Ishihara

Large vision-language models (LVLMs) derive their capabilities from extensive training on vast corpora of visual and textual data. Empowered by large-scale parameters, these models often exhibit strong memorization of their training data,…

Cryptography and Security · Computer Science 2025-11-05 Jinhua Yin , Peiru Yang , Chen Yang , Huili Wang , Zhiyang Hu , Shangguang Wang , Yongfeng Huang , Tao Qi

Membership inference attacks (MIAs) on code completion models offer an effective way to assess privacy risks by inferring whether a given code snippet was part of the training data. Existing black- and gray-box MIAs rely on expensive…

Software Engineering · Computer Science 2025-11-20 Yuan Jiang , Zehao Li , Shan Huang , Christoph Treude , Xiaohong Su , Tiantian Wang