4 papers
Period-conscious Time-series Reconstruction under Local Differential Privacy
Yaxuan Wang, Tianxin Li, Enji Liang +2
Periodic patterns are fundamental cues in multimedia signals and systems, including repetitive motion in video (e.g., gait cycles), rhythmic and pitch-related structure in audio, a…
Private Speech Classification without Collapse: Stabilized DP Training and Offline Distillation
Yadi Wen, Tianxin Li, Enji Liang +2
We study example-level private supervised speech classification under a practical release constraint: training may access privileged side information, but the released model must b…
Private Zeroth-Order Optimization with Public Data
Xuchen Gong, Tian Li
One of the major bottlenecks for deploying popular first-order differentially private (DP) machine learning algorithms (e.g., DP-SGD) lies in their high computation and memory cost…
Zeroth-Order Sharpness-Aware Learning with Exponential Tilting
Xuchen Gong, Tian Li
Classic zeroth-order optimization approaches typically optimize for a smoothed version of the original function, i.e., the expected objective under randomly perturbed model paramet…