Under clientwise sample-level zCDP, the Fisher information of any fully interactive public federated transcript contracts to a sum of per-client privacy-vs-sample terms, yielding matching minimax rates for mean, linear, and nonparametric regression.
Improved Analysis of Sparse Linear Regression in Local Differential Privacy Model, October 2023
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A Van Trees Lower Bound for Fully Interactive Differentially Private Federated Learning
Under clientwise sample-level zCDP, the Fisher information of any fully interactive public federated transcript contracts to a sum of per-client privacy-vs-sample terms, yielding matching minimax rates for mean, linear, and nonparametric regression.