PEFT Structural Leakage
Arxiv
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2026-08-01T00:00:00
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Abstract
Services deploying public foundation models alongside private parameter-efficient fine-tuning (PEFT) adaptations create a differential leakage surface. If an adversary can execute the public base model locally, they can compare its outputs to the victim service's outputs to infer structural details such as the PEFT family, layer locality, and rank.
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