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Once-for-All Adversarial Training: In-Situ Tradeoff between Robustness and Accuracy for Free

NeurIPS 2020 · Adversarial robustness and security › Certified and empirical robustness · approach: Robustness-accuracy trade-off analysis · 34 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Condition one model on λ and use dual batch normalization to separate clean and adversarial feature statisticsOAT · SVHN test, PGD-7SA/RA trade-off: 94.43% SA and 62.16% RA -> 97.07% SA and 37.32% RA as λ varies from 1 to 0.1Helped
Replace dual BN with normal BN (ablation)OAT · SVHN test, PGD-7SA-RA trade-off: 61.81% to 62.62% RA; SA less than 94%Hurt
Train with a denser λ set S2 instead of sparse S1 (ablation)OAT · SVHNSA/RAMixed
Train on sparse λ values and evaluate at unseen λ valuesOAT · SVHN, unseen λ set S3SA/RAHelped
Sample λ continuously from [0,1] instead of the sparse discrete set (ablation)OAT · SVHNSA/RA: within ±0.2% for SA/RANo clear effect
Use continuous λ sampling rather than the discrete sparse set (ablation)OAT · SVHN trainingepochs to converge: 10% more epochsHurt
Omit λ=0 during normal-BN training (ablation)OAT · CIFAR-10, λ>0SA/RA: within ±0.5% SA/RANo clear effect
Use normal BN and omit λ=0 instead of using dual BN (ablation)OAT · CIFAR-10best achievable SA: 91.5% -> 93.1%Hurt
Encode λ with RO-16 or RO-128 instead of leaving it unencoded (ablation)OAT · CIFAR-10best achievable SA: 92.53% -> 93.16%; 92.53% -> 93.68%Helped
Increase random orthogonal λ encoding dimension from 16 to 128 (ablation)OAT · CIFAR-10best achievable SA: 93.16% -> 93.68%Helped
Condition on channel width as well as λOATS · CIFAR-10, width 0.5, 0.75, and 1.0SA-RA trade-offNo clear effect

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