Code Of Ethics: I acknowledge that I and all co-authors of this work have read and commit to adhering to the ICLR Code of Ethics.
Keywords: Machine learning, Membership Inference Attack, Computer Vision
Submission Guidelines: I certify that this submission complies with the submission instructions as described on https://iclr.cc/Conferences/2024/AuthorGuide.
TL;DR: A novel label-only MIA that reduce the query budget.
Abstract: As one of the privacy threats to machine learning models, the membership inference attack (MIA) tries to infer whether a given sample is in the original training set of a victim model by analyzing its outputs. Recent studies only use the predicted hard labels to achieve impressive membership inference accuracy. However, such label-only MIA approach requires very high query budgets to evaluate the distance of the target sample from the victim model's decision boundary.
We propose YOQO, a novel label-only attack to overcome the above limitation.YOQO aims at identifying a special area (called improvement area) around the target sample and crafting a query sample, whose hard label from the victim model can reliably reflect the target sample's membership. YOQO can successfully reduce the query budget from more than 1,000 times to only ONCE. Experiments demonstrate that YOQO is not only as effective as SOTA attack methods, but also performs comparably or even more robustly against many sophisticated defenses.
Anonymous Url: I certify that there is no URL (e.g., github page) that could be used to find authors' identity.
Supplementary Material: zip
No Acknowledgement Section: I certify that there is no acknowledgement section in this submission for double blind review.
Primary Area: societal considerations including fairness, safety, privacy
Submission Number: 2986
Loading