Jogging the Memory of Unlearned Model Through Targeted Relearning Attack
CoRR(2024)
摘要
Machine unlearning is a promising approach to mitigate undesirable
memorization of training data in ML models. However, in this work we show that
existing approaches for unlearning in LLMs are surprisingly susceptible to a
simple set of targeted relearning attacks. With access to only a small and
potentially loosely related set of data, we find that we can 'jog' the memory
of unlearned models to reverse the effects of unlearning. We formalize this
unlearning-relearning pipeline, explore the attack across three popular
unlearning benchmarks, and discuss future directions and guidelines that result
from our study.
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