Have I Seen You? Embedding Behavior Signals Synthetic Face Dataset Membership

Title:Have I Seen You? Embedding Behavior Signals Synthetic Face Dataset Membership

Abstract:Synthetic face datasets are increasingly used to reduce privacy exposure and data access constraints in biometric recognition. Yet the generators that produce these datasets are trained on real faces, so synthetic data may still reveal their real source data. We study this risk through a dataset-level membership inference attack that first identifies the synthetic dataset used to train a face recognizer and then infers the real dataset used to train the generator. Across 11 face recognition models, 11 synthetic datasets, and 7 real datasets, the attack recovers the synthetic training dataset in 100% of cases and identifies the generator's source dataset in 54.5% of cases. These results show that synthetic data can retain dataset-level traces of real training data and that privacy-preserving deployment requires stronger leakage mitigation.

Computer Vision and Pattern Recognition (cs.CV); Artificial Intelligence (cs.AI); Machine Learning (cs.LG)

arXiv:2607.29144 [cs.CV]

(or arXiv:2607.29144v1 [cs.CV] for this version)

https://doi.org/10.48550/arXiv.2607.29144 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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