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Unlearning Isn’t Forgetting: Revealing Hidden Leakage in Class Unlearning Evaluations

This paper reveals a significant shortcoming in class unlearning evaluations: overlooking the underlying class geometry can cause information leakage about the forgotten class, and proposes a new fine-tuning objective that mitigates this privacy leakage by approximating the distribution over the remaining classes that...

Ali Ebrahimpour-Boroojeny, Yian Wang, Hari Sundaram · 0 citations
#artificial intelligence Preprint Aug 2026

Facts Without Rules: Boundary Metadata Collapse in Multi-Agent LLM Handoffs

It is shown that this handoff step is a structural source of privacy leakage: summaries preferentially preserve operational facts while weakening the boundary metadata that governs how those facts may be used---a failure mode the authors call summary collapse.

Yian Wang, Agam Goyal, Eshwar Chandrasekharan et al. · 0 citations

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