Search Results for author: Weixian Li

Found 2 papers, 1 papers with code

DC-SGD: Differentially Private SGD with Dynamic Clipping through Gradient Norm Distribution Estimation

no code implementations29 Mar 2025 Chengkun Wei, Weixian Li, Chen Gong, Wenzhi Chen

In this paper, we propose Dynamic Clipping DP-SGD (DC-SGD), a framework that leverages differentially private histograms to estimate gradient norm distributions and dynamically adjust the clipping threshold C. Our framework includes two novel mechanisms: DC-SGD-P and DC-SGD-E. DC-SGD-P adjusts the clipping threshold based on a percentile of gradient norms, while DC-SGD-E minimizes the expected squared error of gradients to optimize C. These dynamic adjustments significantly reduce the burden of hyperparameter tuning C. The extensive experiments on various deep learning tasks, including image classification and natural language processing, show that our proposed dynamic algorithms achieve up to 9 times acceleration on hyperparameter tuning than DP-SGD.

Deep Learning image-classification +3

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