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Attacking deep networks with surrogate-based adversarial black-box methods is easy

ICLR 2022 · Adversarial robustness and security › Black-box and transfer attacks · approach: Query-efficient black-box attacks · 10 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use GFCS, transferring surrogate loss gradients first and coimage directions as fallbackImageNet untargeted attacks with one surrogate · VGG-16, ResNet-50, and Inception-v3median queries: 6±0.3; 4±0.4; 18±1.1Helped
Use GFCS with four surrogates instead of the strongest listed query-count baselineImageNet untargeted attacks · VGG-16, ResNet-50, and Inception-v3median queries: 4±0.2 vs 16±2.3; 4±0.0 vs 14±0.5; 9±0.5 vs 29±1.4Helped
Add coimage sampling as a fallback when surrogate loss gradients fail (ablation)GFCS · ImageNet untargeted attacks, one and four surrogatessuccess rate: 58.55% -> 99.90%; 75.90% -> 99.85%; 38.25% -> 98.60%; 98.65% -> 100%; 96.50% -> 99.95%; 80.20% -> 99.40%Helped
Increase SimBA-ODS step length from its default ε=0.2 to ε=2SimBA-ODS · ImageNet untargeted attacksmedian queries: 117±5.1 -> 15±0.7; 91.5±3.2 -> 11±0.4; 275±14 -> 36±1.9Helped
Use input-specific surrogate gradients rather than a fixed basis priorGFCS and SimBA-style search · ImageNet untargeted attacksquery efficiencyHelped
Use adversarial-gradient PCA directions instead of the canonical pixel basisSimBA-PCA-gradients · ImageNet untargeted attacksquery efficiencyHelped
Use principal image components instead of the canonical pixel basisSimBA-PCA-images · ImageNet untargeted attacksquery efficiencyHelped
Use adversarial-gradient PCA rather than the DCT basisSimBA-PCA-gradients · ImageNet untargeted attacksquery efficiencyNo clear effect
Use a four-surrogate set instead of ResNet-152 aloneGFCS · ImageNet untargeted attacksneed for coimage queriesHelped
Use GFCS rather than SimBA-ODS aloneImageNet targeted attacks with four surrogates · VGG-16 and ResNet-50query efficiencyHelped
Use GFCS on adversarially trained Inception-v3 rather than competing attack methodsImageNet untargeted attacks with four surrogates · Adversarially trained Inception-v3query efficiencyHelped

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