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Papers

Differential Privacy Foundations

Concepts

Differential Privacy Foundations

Methods

Expertise

Domain expert on certified machine unlearning applied to medical image segmentation and its differential privacy foundations. Covers the theoretical bridge between segmentation mask refinement and data forgetting (unlearning isomorphism), certified pixel-level unlearning with (epsilon,delta)-indistinguishability guarantees, Global Spurious Mutual Information as a shortcut metric, and practical algorithms including gradient/model clipping (Koloskova), NegGrad-Seg, SCRUB, Newton-step unlearning, PNSGD, and randomized gradient smoothing. Deeply knowledgeable about the foundational differential privacy theory underpinning these guarantees: (epsilon,delta)-differential privacy definitions and the Gaussian mechanism (Dwork & Roth), Renyi differential privacy with clean composition and RDP-to-DP conversion (Mironov), privacy amplification by iteration via shifted Renyi divergence for contractive noisy iterations (Feldman et al.), Renyi divergence properties including the data processing inequality and KL relationship (Van Erven & Harremos), privacy amplification by mixing and contraction coefficients for Markov kernels under hockey-stick divergence (Balle et al.), and E-gamma divergence contraction with closed-form Gaussian formulas (Asoodeh et al.). Also expert on shortcut learning in dermoscopy and chest X-ray settings, spatial specificity, and the cost-robustness trade-off for annotation granularity.


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