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KGA: A General Machine Unlearning Framework Based on Knowledge Gap Alignment

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arxiv 2305.06535 v1 pith:OCFGDU5G submitted 2023-05-11 cs.CL

classification cs.CL
keywords unlearningdistributionframeworkgeneralinformationknowledgemachinemodels
verification ladder T0 review T1 audit T2 compute T3 formal
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Recent legislation of the "right to be forgotten" has led to the interest in machine unlearning, where the learned models are endowed with the function to forget information about specific training instances as if they have never existed in the training set. Previous work mainly focuses on computer vision scenarios and largely ignores the essentials of unlearning in NLP field, where text data contains more explicit and sensitive personal information than images. In this paper, we propose a general unlearning framework called KGA to induce forgetfulness. Different from previous work that tries to recover gradients or forces models to perform close to one specific distribution, KGA maintains distribution differences (i.e., knowledge gap). This relaxes the distribution assumption. Furthermore, we first apply the unlearning method to various NLP tasks (i.e., classification, translation, response generation) and propose several unlearning evaluation metrics with pertinence. Experiments on large-scale datasets show that KGA yields comprehensive improvements over baselines, where extensive analyses further validate the effectiveness of KGA and provide insight into unlearning for NLP tasks.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Space Complexity of Learning-Unlearning Algorithms

    cs.LG 2025-06 accept novelty 8.0 of 10

    The space complexity of machine unlearning for realizability testing is characterized by eluder dimension (central lower bound), star number (ticketed upper bound), and hollow star number (bounded deletions), separati...

  2. Distribution Preference Optimization: A Fine-grained Perspective for LLM Unlearning

    cs.LG 2025-10 conditional novelty 6.0 of 10

    DiPO is a distribution-level unlearning method that constructs preference distributions from the model's own high-confidence logits and achieves state-of-the-art forget quality on TOFU while preserving utility.

  3. LLM Unlearning Should Be Form-Independent

    cs.CL 2025-06 conditional novelty 6.0 of 10

    Existing LLM unlearning is form-dependent; the new ORT benchmark measures this, and the training-free ROCR edit reduces it by redirecting concept representations.

  4. Automating Evaluation of Diffusion Model Unlearning with (Vision-) Language Model World Knowledge

    cs.LG 2025-07 conditional novelty 5.0 of 10

    A new evaluation tool uses (vision-)language model world knowledge to rank nearby concepts and craft adversarial prompts, showing that diffusion unlearning is incomplete and that semantic similarity correlates with co...

  5. SOFT: Selective Data Obfuscation for Protecting LLM Fine-tuning against Membership Inference Attacks

    cs.CR 2025-06 conditional novelty 5.0 of 10

    SOFT paraphrases low-loss fine-tuning samples before training, reducing MIA AUC from about 0.82 to about 0.54 across six datasets at roughly 7% perplexity cost.

  6. Lifting Data-Tracing Machine Unlearning to Knowledge-Tracing for Foundation Models

    cs.CV 2025-06 conditional novelty 4.0 of 10

    A position paper urging a shift from data-tracing to knowledge-tracing machine unlearning for foundation models, supported by a CLIP case study that shows current methods struggle to generalize.

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