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arXiv 2201.06640cs.LGcs.CV
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不精确机器遗忘的对抗性评估

Towards Adversarial Evaluations for Inexact Machine Unlearning

IIIT Hyderabad(海得拉巴国际信息技术学院);University of Oxford(牛津大学);ETH Zurich(苏黎世联邦理工学院);MPI-IS(马克斯·普朗克智能系统研究所);Meta AI

Shashwat Goel, Ameya Prabhu, Amartya Sanyal, Ser-Nam Lim, Philip Torr, Ponnurangam Kumaraguru

摘要:

机器学习模型面临着越来越多的关于个人用户数据存储以及后门或系统偏差等损坏数据的不利影响的担忧。机器遗忘可以通过允许从学习模型中事后删除受影响的训练数据来解决这些问题。准确地实现这一任务是计算昂贵的,因此,最近的作品提出了不精确的非学习算法来解决这个近似以及评估方法来测试这些算法的有效性。在这项工作中,我们首先概述了一些必要的标准,评估方法,并显示没有现有的评估满足他们。然后,我们设计了一种更强大的黑盒评估方法,称为类间混淆(IC)测试,它在训练过程中反向操作数据,以检测非学习过程的不足。我们还提出了两种分析动机的基线方法~(EU-k和CF-k),它们优于几种流行的不精确非学习方法。总的来说,我们展示了对抗性评估策略如何有助于分析各种遗忘现象,从而指导更强大的遗忘算法的开发。

英文摘要:

Machine Learning models face increased concerns regarding the storage of personal user data and adverse impacts of corrupted data like backdoors or systematic bias. Machine Unlearning can address these by allowing post-hoc deletion of affected training data from a learned model. Achieving this task exactly is computationally expensive; consequently, recent works have proposed inexact unlearning algorithms to solve this approximately as well as evaluation methods to test the effectiveness of these algorithms. In this work, we first outline some necessary criteria for evaluation methods and show no existing evaluation satisfies them all. Then, we design a stronger black-box evaluation method called the Interclass Confusion (IC) test which adversarially manipulates data during training to detect the insufficiency of unlearning procedures. We also propose two analytically motivated baseline methods~(EU-k and CF-k) which outperform several popular inexact unlearning methods. Overall, we demonstrate how adversarial evaluation strategies can help in analyzing various unlearning phenomena which can guide the development of stronger unlearning algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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