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We demonstrate how a target model's generalization gap leads directly to an effective deterministic black box membership inference attack (MIA). This provides an upper bound on how secure a model can be to MIA based on a simple metric.…

Machine Learning · Computer Science 2020-09-15 Jason W. Bentley , Daniel Gibney , Gary Hoppenworth , Sumit Kumar Jha

Ensuring the privacy of research participants is vital, even more so in healthcare environments. Deep learning approaches to neuroimaging require large datasets, and this often necessitates sharing data between multiple sites, which is…

Quantitative Methods · Quantitative Biology 2021-06-04 Umang Gupta , Dimitris Stripelis , Pradeep K. Lam , Paul M. Thompson , José Luis Ambite , Greg Ver Steeg

The data used to train deep neural network (DNN) models in applications such as healthcare and finance typically contain sensitive information. A DNN model may suffer from overfitting. Overfitted models have been shown to be susceptible to…

Machine Learning · Computer Science 2022-12-19 Arezoo Rajabi , Dinuka Sahabandu , Luyao Niu , Bhaskar Ramasubramanian , Radha Poovendran

The state-of-the-art for membership inference attacks on machine learning models is a class of attacks based on shadow models that mimic the behavior of the target model on subsets of held-out nonmember data. However, we find that this…

Machine Learning · Computer Science 2025-10-28 Pratiksha Thaker , Neil Kale , Zhiwei Steven Wu , Virginia Smith

Given a trained model and a data sample, membership-inference (MI) attacks predict whether the sample was in the model's training set. A common countermeasure against MI attacks is to utilize differential privacy (DP) during model training…

Cryptography and Security · Computer Science 2022-04-14 Saeed Mahloujifar , Alexandre Sablayrolles , Graham Cormode , Somesh Jha

Membership inference attacks (MIA) aim to infer whether a particular data point is part of the training dataset of a model. In this paper, we propose a new task in the context of LLM privacy: entity-level discovery of membership risk…

Machine Learning · Computer Science 2025-11-04 Ali Satvaty , Suzan Verberne , Fatih Turkmen

Neural models for vulnerability prediction (VP) have achieved impressive performance by learning from large-scale code repositories. However, their susceptibility to Membership Inference Attacks (MIAs), where adversaries aim to infer…

Cryptography and Security · Computer Science 2025-12-10 Yihan Liao , Jacky Keung , Xiaoxue Ma , Jingyu Zhang , Yicheng Sun

Transfer learning, successful in knowledge translation across related tasks, faces a substantial privacy threat from membership inference attacks (MIAs). These attacks, despite posing significant risk to ML model's training data, remain…

Cryptography and Security · Computer Science 2025-01-22 Cong Wu , Jing Chen , Qianru Fang , Kun He , Ziming Zhao , Hao Ren , Guowen Xu , Yang Liu , Yang Xiang

In Embedding-as-an-Interface (EaaI) settings, pre-trained models are queried for Intermediate Representations (IRs). The distributional properties of IRs can leak training-set membership signals, enabling Membership Inference Attacks (MIAs)…

Machine Learning · Computer Science 2026-05-12 Jiayang Meng , Tao Huang , Chen Hou , Guolong Zheng , Hong Chen

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

In this evolving era of machine learning security, membership inference attacks have emerged as a potent threat to the confidentiality of sensitive data. In this attack, adversaries aim to determine whether a particular point was used…

Machine Learning · Computer Science 2024-06-21 Abhishek Sinha , Himanshi Tibrewal , Mansi Gupta , Nikhar Waghela , Shivank Garg

While Federated Learning (FL) mitigates direct data exposure, the resulting trained models remain susceptible to membership inference attacks (MIAs). This paper presents an empirical evaluation of Differential Privacy (DP) as a defense…

Cryptography and Security · Computer Science 2026-04-16 Gustavo de Carvalho Bertoli

Membership Inference Attacks exploit the vulnerabilities of exposing models trained on customer data to queries by an adversary. In a recently proposed implementation of an auditing tool for measuring privacy leakage from sensitive…

Machine Learning · Computer Science 2020-09-21 Abhinav Aggarwal , Zekun Xu , Oluwaseyi Feyisetan , Nathanael Teissier

The high cost of model training makes it increasingly desirable to develop techniques for unlearning. These techniques seek to remove the influence of a training example without having to retrain the model from scratch. Intuitively, once a…

Machine Learning · Computer Science 2024-05-22 Jamie Hayes , Ilia Shumailov , Eleni Triantafillou , Amr Khalifa , Nicolas Papernot

Despite its great success, deep learning severely suffers from robustness; that is, deep neural networks are very vulnerable to adversarial attacks, even the simplest ones. Inspired by recent advances in brain science, we propose the…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Kaiyuan Liu , Xingyu Li , Yurui Lai , Ge Zhang , Hang Su , Jiachen Wang , Chunxu Guo , Jisong Guan , Yi Zhou

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

Membership inference attacks allow adversaries to determine whether a particular example was contained in the model's training dataset. While previous works have confirmed the feasibility of such attacks in various applications, none has…

Cryptography and Security · Computer Science 2023-11-28 Guangke Chen , Yedi Zhang , Fu Song

While Membership Inference Attacks (MIAs) are the prevailing method for identifying training data, their application has expanded into privacy auditing and machine unlearning. Nevertheless, the field lacks a systematic framework for…

Machine Learning · Computer Science 2026-05-29 Ding Chen , Xinwen Cheng , Xuyang Zhong , Xinping Chen , Xiaolin Huang , Chen Liu

Graph Neural Networks (GNNs), inspired by Convolutional Neural Networks (CNNs), aggregate the message of nodes' neighbors and structure information to acquire expressive representations of nodes for node classification, graph…

Cryptography and Security · Computer Science 2022-07-29 Mauro Conti , Jiaxin Li , Stjepan Picek , Jing Xu

As a long-term threat to the privacy of training data, membership inference attacks (MIAs) emerge ubiquitously in machine learning models. Existing works evidence strong connection between the distinguishability of the training and testing…

Machine Learning · Computer Science 2022-07-14 Dingfan Chen , Ning Yu , Mario Fritz