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PrivSGP-VR: Differentially Private Variance-Reduced Stochastic Gradient Push with Tight Utility Bounds
May 7, 2024, 4:42 a.m. | Zehan Zhu, Yan Huang, Xin Wang, Jinming Xu
cs.LG updates on arXiv.org arxiv.org
Abstract: In this paper, we propose a differentially private decentralized learning method (termed PrivSGP-VR) which employs stochastic gradient push with variance reduction and guarantees $(\epsilon, \delta)$-differential privacy (DP) for each node. Our theoretical analysis shows that, under DP Gaussian noise with constant variance, PrivSGP-VR achieves a sub-linear convergence rate of $\mathcal{O}(1/\sqrt{nK})$, where $n$ and $K$ are the number of nodes and iterations, respectively, which is independent of stochastic gradient variance, and achieves a linear speedup with …
abstract analysis arxiv cs.lg decentralized delta differential differential privacy epsilon gradient node noise paper privacy shows stochastic type utility variance
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