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MIA-EPT: Membership Inference Attack via Error Prediction for Tabular Data

Created by
  • Haebom

Author

Eyal German, Daniel Samira, Yuval Elovici, Asaf Shabtai

MIA-EPT: Membership Inference Attack via Error Prediction for Tabular Data

Outline

This paper highlights the importance of synthetic data generation for sensitive data sharing and analyzes vulnerabilities in diffusion models that generate tabular data. Specifically, it points out that membership inference attacks (MIA) can allow models to memorize training data and leak sensitive information. MIA-EPT is a novel black-box attack specialized for tabular data that masks and reconstructs attributes to construct error-based feature vectors to reveal membership signals. MIA-EPT demonstrates generalizability across multiple diffusion models using only synthetic data output, achieving second place in the MIDST 2025 competition.

Takeaways, Limitations

We demonstrate the vulnerability of tabular data generation models to membership inference attacks and raise questions about the privacy protection of synthetic data.
MIA-EPT is a black-box attack that demonstrates that membership information can be effectively inferred without accessing the internal structure of the model.
The effectiveness of the attack was proven by achieving performances of up to 0.599 in AUC-ROC and up to 22.0% in TPR@10% and FPR@10%, respectively.
It showed real attack potential by taking second place in the MIDST 2025 competition.
Making research easier to reproduce and utilize by making code public.
The performance of MIA-EPT may vary depending on the model and dataset, and more extensive evaluation is needed.
This study focuses on attack methods, and exploring defense mechanisms remains a topic for further research.
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