Fed$n$nP: Federated Unlearning With Multiple Client Set Partitions
Bibliographic record
Abstract
Federated learning (FL) has garnered increased attention in the field of distributed machine learning and privacy computing. In the FL setup, effective and efficient unlearning algorithms are required to remove the impact of specific training data from the trained model, called federated unlearning. However, traditional machine unlearning algorithms face limitations in FL systems because the client data is private and even non-IID. In this paper, we propose a new federated unlearning algorithm called FednP. Our approach involves dividing the client set into subsets using multiple different partitions. We then train constituent models for each client subset within these partitions using existing FL algorithms and aggregate the results of constituent models for predictions. With multiple partitions, FednP limits the influence of the data to be erased within its belonging subsets, while it also improves the accuracy of the aggregated prediction. Based on the multiple-partition framework, we design partition creation methods to effectively enhance the prediction accuracy. Furthermore, we propose a cost reduction method to reduce the cost of training/retraining. Our extensive experiments on various datasets and model architectures demonstrate that FednP improves prediction accuracy while well-controls the additional cost.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.012 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.005 |
| Open science | 0.004 | 0.004 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".