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Personalization Improves Privacy-Accuracy Tradeoffs in Federated Optimization. (arXiv:2202.05318v1 [stat.ML])
Feb. 14, 2022, 2:11 a.m. | Alberto Bietti, Chen-Yu Wei, Miroslav Dudik, John Langford, Zhiwei Steven Wu
cs.LG updates on arXiv.org arxiv.org
Large-scale machine learning systems often involve data distributed across a
collection of users. Federated optimization algorithms leverage this structure
by communicating model updates to a central server, rather than entire
datasets. In this paper, we study stochastic optimization algorithms for a
personalized federated learning setting involving local and global models
subject to user-level (joint) differential privacy. While learning a private
global model induces a cost of privacy, local learning is perfectly private. We
show that coordinating local learning with private …
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