Machine Learning (ML) models contain private information, and implementing the right to be forgotten is a challenging privacy issue in many data applications. Machine unlearning has emerged as an alternative to remove sensitive data from a trained model, but completely retraining ML models is often not feasible. This survey provides a concise appraisal of Machine Unlearning techniques, encompassing both exact and approximate methods, probable attacks, and verification approaches. The survey compares the merits and limitations each method and evaluates their performance using the Deltagrad exact machine unlearning method. The survey also highlights challenges like the pressing need for a robust model for non-IID deletion to mitigate fairness issues. Overall, the survey provides a thorough synopsis of machine unlearning techniques and applications, noting future research directions in this evolving field. The survey aims to be a valuable resource for researchers and practitioners seeking to provide privacy and equity in ML systems.

该调查提供了机器遗忘技术的简明评估，概述了准确和近似方法、可疑攻击和验证方法，并比较了每种方法的优点和局限性，评估了它们的性能，突出了挑战性的需求。提供强大的非IID删除模型以缓解公平性问题，并指出该领域未来的研究方向，旨在为寻求在ML系统中提供隐私和平等的研究人员和从业者提供有价值的资源。

学习如何忘却：机器遗忘调查