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Membership inference attacks (MIAs) against machine learning models can lead to serious privacy risks for the training dataset used in the model training. In this paper, we propose a novel and effective Neuron-Guided Defense method named…

Cryptography and Security · Computer Science 2022-12-14 Nuo Xu , Binghui Wang , Ran Ran , Wujie Wen , Parv Venkitasubramaniam

An over-the-air membership inference attack (MIA) is presented to leak private information from a wireless signal classifier. Machine learning (ML) provides powerful means to classify wireless signals, e.g., for PHY-layer authentication. As…

Cryptography and Security · Computer Science 2021-07-27 Yi Shi , Yalin E. Sagduyu

Membership inference attacks (MIA) try to detect if data samples were used to train a neural network model, e.g. to detect copyright abuses. We show that models with higher dimensional input and output are more vulnerable to MIA, and…

Machine Learning · Computer Science 2021-08-19 Avital Shafran , Shmuel Peleg , Yedid Hoshen

Retrieval-Augmented Generation (RAG) and Supervised Finetuning (SFT) have become the predominant paradigms for equipping Large Language Models (LLMs) with external knowledge for diverse, knowledge-intensive tasks. However, while such…

Cryptography and Security · Computer Science 2025-12-04 Haowei Fu , Bo Ni , Han Xu , Kunpeng Liu , Dan Lin , Tyler Derr

Membership inference attacks (MIAs) aim to determine whether specific data were used to train a model. While extensively studied on classification models, their impact on time series forecasting remains largely unexplored. We address this…

Machine Learning · Computer Science 2026-02-13 Nicolas Johansson , Tobias Olsson , Daniel Nilsson , Johan Östman , Fazeleh Hoseini

Membership inference attacks (MIAs) have become the standard tool for evaluating privacy leakage in machine learning (ML). Among them, the Likelihood-Ratio Attack (LiRA) is widely regarded as the state of the art when sufficient shadow…

Cryptography and Security · Computer Science 2026-03-10 Najeeb Jebreel , Mona Khalil , David Sánchez , Josep Domingo-Ferrer

Graph neural networks (GNNs) are widely used for graph-structured data but are vulnerable to membership inference attacks (MIAs) in graph classification tasks, which determine if a graph was part of the training dataset, potentially causing…

Machine Learning · Computer Science 2025-03-27 Jiazhu Dai , Yubing Lu

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…

The proliferation of large language models (LLMs) in the real world has come with a rise in copyright cases against companies for training their models on unlicensed data from the internet. Recent works have presented methods to identify if…

Machine Learning · Computer Science 2024-06-11 Pratyush Maini , Hengrui Jia , Nicolas Papernot , Adam Dziedzic

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

Large Language Models (LLMs) are increasingly deployed to enable or improve a multitude of real-world applications. Given the large size of their training data sets, their tendency to memorize training data raises serious privacy and…

Machine Learning · Computer Science 2026-01-27 Pedram Zaree , Md Abdullah Al Mamun , Yue Dong , Ihsen Alouani , Nael Abu-Ghazaleh

Machine learning (ML) has been widely adopted in various privacy-critical applications, e.g., face recognition and medical image analysis. However, recent research has shown that ML models are vulnerable to attacks against their training…

Machine Learning · Computer Science 2021-09-20 Zheng Li , Yang Zhang

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

Membership Inference Attack (MIA) determines the presence of a record in a machine learning model's training data by querying the model. Prior work has shown that the attack is feasible when the model is overfitted to its training data or…

Cryptography and Security · Computer Science 2018-02-15 Yunhui Long , Vincent Bindschaedler , Lei Wang , Diyue Bu , Xiaofeng Wang , Haixu Tang , Carl A. Gunter , Kai Chen

Membership inference attacks (MIA) attempt to verify the membership of a given data sample in the training set for a model. MIA has become relevant in recent years, following the rapid development of large language models (LLM). Many are…

Computation and Language · Computer Science 2025-02-04 Haritz Puerto , Martin Gubri , Sangdoo Yun , Seong Joon Oh

In membership inference attacks (MIAs), an adversary observes the predictions of a model to determine whether a sample is part of the model's training data. Existing MIA defenses conceal the presence of a target sample through strong…

Cryptography and Security · Computer Science 2022-03-03 Ismat Jarin , Birhanu Eshete

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

Federated Learning enables collaborative learning among clients via a coordinating server while avoiding direct data sharing, offering a perceived solution to preserve privacy. However, recent studies on Membership Inference Attacks (MIAs)…

Cryptography and Security · Computer Science 2025-08-04 Quan Nguyen , Minh N. Vu , Truc Nguyen , My T. Thai

Label differential privacy (label-DP) is a popular framework for training private ML models on datasets with public features and sensitive private labels. Despite its rigorous privacy guarantee, it has been observed that in practice…

Machine Learning · Computer Science 2023-06-06 Ruihan Wu , Jin Peng Zhou , Kilian Q. Weinberger , Chuan Guo

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