AutoMIA: Improved Baselines for Membership Inference Attack via Agentic Self-Exploration

Fuente: arXiv
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Auteurs principaux: Liu, Ruhao, Huang, Weiqi, Li, Qi, Wang, Xinchao
Format: Preprint
Publié: 2026
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author Liu, Ruhao
Huang, Weiqi
Li, Qi
Wang, Xinchao
author_facet Liu, Ruhao
Huang, Weiqi
Li, Qi
Wang, Xinchao
contents Membership Inference Attacks (MIAs) serve as a fundamental auditing tool for evaluating training data leakage in machine learning models. However, existing methodologies predominantly rely on static, handcrafted heuristics that lack adaptability, often leading to suboptimal performance when transferred across different large models. In this work, we propose AutoMIA, an agentic framework that reformulates membership inference as an automated process of self-exploration and strategy evolution. Given high-level scenario specifications, AutoMIA self-explores the attack space by generating executable logits-level strategies and progressively refining them through closed-loop evaluation feedback. By decoupling abstract strategy reasoning from low-level execution, our framework enables a systematic, model-agnostic traversal of the attack search space. Extensive experiments demonstrate that AutoMIA consistently matches or outperforms state-of-the-art baselines while eliminating the need for manual feature engineering.
format Preprint
id arxiv_https___arxiv_org_abs_2604_01014
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle AutoMIA: Improved Baselines for Membership Inference Attack via Agentic Self-Exploration
Liu, Ruhao
Huang, Weiqi
Li, Qi
Wang, Xinchao
Cryptography and Security
Computer Vision and Pattern Recognition
Membership Inference Attacks (MIAs) serve as a fundamental auditing tool for evaluating training data leakage in machine learning models. However, existing methodologies predominantly rely on static, handcrafted heuristics that lack adaptability, often leading to suboptimal performance when transferred across different large models. In this work, we propose AutoMIA, an agentic framework that reformulates membership inference as an automated process of self-exploration and strategy evolution. Given high-level scenario specifications, AutoMIA self-explores the attack space by generating executable logits-level strategies and progressively refining them through closed-loop evaluation feedback. By decoupling abstract strategy reasoning from low-level execution, our framework enables a systematic, model-agnostic traversal of the attack search space. Extensive experiments demonstrate that AutoMIA consistently matches or outperforms state-of-the-art baselines while eliminating the need for manual feature engineering.
title AutoMIA: Improved Baselines for Membership Inference Attack via Agentic Self-Exploration
topic Cryptography and Security
Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2604.01014