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Composite Adversarial Attacks

AAAI 2021 · Adversarial robustness and security › Attacks on text and graphs · approach: Defenses against universal perturbations · 36 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Compose a searched sequence of attacks instead of using a single attackCAA on CIFAR-10 l∞ defenses · CIFAR-10 l∞robust accuracy (%): BestAttack: 50.12, 52.01, 55.23, 41.85, 9.12, 0.84, 60.74 -> CAA_dic: 49.18, 51.10, 54.69, 40.69, 7.28, 0.0, 59.38Helped
Use proxy-searched CAA rather than state-of-the-art attack baselinesCAA_sub on ImageNet l∞ · ImageNet l∞robust accuracy (%): 40.03 -> 38.30Helped
Compose unrestricted base attacks in a searched policyCAA_dic · Bird&Bicycle unrestrictedrobust accuracy (%): 100.0 -> 7.9; 100.0 -> 4.0Helped
Use CAA_sub rather than CAA_dicCAA on CIFAR-10 l∞ · CIFAR-10 l∞robust accuracy (%): 49.18 -> 49.18; 51.19 -> 51.10; 54.82 -> 54.69; 40.87 -> 40.69; 7.47 -> 7.28; 0.0 -> 0.0; 59.45 -> 59.38No clear effect
Replace direct attack-policy search with ensemble aggregationCAA versus EnsAttack · CIFAR-10 l∞robust accuracy (%): CAA_dic: 49.18, 51.10, 54.69, 40.69, 7.28, 0.0, 59.38; EnsAttack: 49.58, 51.51, 55.02, 41.56, 8.33, 0.73, 60.12Hurt
Use a longer attack policy (ablation)CAA · l∞, l2, and unrestrictedrobust accuracyHelped
Increase policy length beyond 3 (ablation)CAA unrestricted · unrestrictedrobust accuracyHelped
Increase policy length (ablation)CAA l2 · l2robust accuracyHelped
Use NSGA-II rather than Random Search-100 (ablation)Attack-policy search · CIFAR-10 l∞, AdvTrainrobust accuracy (%): 52.09 -> 49.18Helped
Use NSGA-II rather than Reinforcement Learning (ablation)Attack-policy search · CIFAR-10 l∞, AdvTrainrobust accuracy (%): 51.44 -> 49.18Helped
Use NSGA-II rather than Bayesian Optimization (ablation)Attack-policy search · CIFAR-10 l∞, AdvTrainrobust accuracy (%): 50.02 -> 49.18Helped
Search from scratch instead of transferring the proxy policy (ablation)CAA on DenseNet · CIFAR-10, DenseNetrobust accuracy (%): 49.90 -> 49.90No clear effect

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