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Score Attack: A Lower Bound Technique for Optimal Differentially Private Learning

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arxiv 2303.07152 v2 pith:QIET5J7T submitted 2023-03-13 math.ST cs.CRcs.LGstat.MEstat.MLstat.TH

Score Attack: A Lower Bound Technique for Optimal Differentially Private Learning

classification math.ST cs.CRcs.LGstat.MEstat.MLstat.TH
keywords attackboundlowermodelprivacyscoreminimaxstatistical
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Achieving optimal statistical performance while ensuring the privacy of personal data is a challenging yet crucial objective in modern data analysis. However, characterizing the optimality, particularly the minimax lower bound, under privacy constraints is technically difficult. To address this issue, we propose a novel approach called the score attack, which provides a lower bound on the differential-privacy-constrained minimax risk of parameter estimation. The score attack method is based on the tracing attack concept in differential privacy and can be applied to any statistical model with a well-defined score statistic. It can optimally lower bound the minimax risk of estimating unknown model parameters, up to a logarithmic factor, while ensuring differential privacy for a range of statistical problems. We demonstrate the effectiveness and optimality of this general method in various examples, such as the generalized linear model in both classical and high-dimensional sparse settings, the Bradley-Terry-Luce model for pairwise comparisons, and non-parametric regression over the Sobolev class.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A Van Trees Lower Bound for Fully Interactive Differentially Private Federated Learning

    cs.LG 2026-05 unverdicted novelty 8.0

    Derives a federated van Trees lower bound under total clientwise sample-level zCDP for parameter estimation with squared l2 loss in federated learning protocols with arbitrary public-transcript interactions.

  2. Robust Statistical Estimators with Bounded Empirical Sensitivity

    math.ST 2026-05 conditional novelty 7.0

    Defines empirical sensitivity and proves Ω(η + √(η d/n)) lower bound (tight up to logs) for any Gaussian mean estimator achieving optimal O(√(d/n)) ℓ₂ error.

  3. A Van Trees Lower Bound for Fully Interactive Differentially Private Federated Learning

    cs.LG 2026-05 conditional novelty 7.0

    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, linea...

  4. High-Dimensional Private Linear Regression with Optimal Rates

    stat.ML 2025-05 accept novelty 7.0

    DP-GD achieves minimax optimal non-asymptotic risk O(γ + γ²/ρ²) for well-conditioned high-dimensional data and power-law scaling for ill-conditioned power-law spectra, with the exponent depending on the privacy parameter ρ.