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AutoZOOM: Autoencoder-Based Zeroth Order Optimization Method for Attacking Black-Box Neural Networks

AAAI 2019 · Adversarial robustness and security › Black-box and transfer attacks · approach: Query-efficient black-box attacks · 371 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use random full-gradient estimation and a reduced-dimensional decoder instead of coordinate-wise ZOO gradientsZOO black-box attack · MNIST, CIFAR-10, and ImageNet targeted attacksmean query count (initial success): 16,533.30 -> 729.65; 11,662.80 -> 332.43; 2,226,405.04 (2.22M) -> 13,525.00Helped
Use an autoencoder decoder rather than bilinear resizingAutoZOOM · CIFAR-10 targeted, λini=1mean query count (initial success): 813.01 -> 332.43Helped
Use an autoencoder decoder rather than bilinear resizingAutoZOOM · MNIST targeted, λini=1mean query count (initial success): 879.98 -> 729.65Helped
Use an autoencoder decoder rather than bilinear resizingAutoZOOM · ImageNet targetedmean query count (initial success): 14,228.88 -> 13,525.00Helped
Increase post-success averaging parameter q above 1 (ablation)AutoZOOM-AE · ImageNet targeted post-success refinementdistortionHelped
Increase post-success averaging parameter beyond q=4 (ablation)AutoZOOM-AE · ImageNet targeted post-success refinementdistortionNo clear effect
Reduce the attack dimension using the autoencoder decoder (ablation)AutoZOOM-AE · MNIST and CIFAR-10 targeted attacksmean query count: roughly 35-40%Helped
Reduce the attack dimension using the autoencoder decoder (ablation)AutoZOOM-AE · ImageNet targeted attackmean query count: at least 95%Helped
Use bilinear resizing rather than the autoencoder decoder (ablation)AutoZOOM · CIFAR-10 targeted, λini=10queries to reach the same distortion: 835.27 vs 990.61Mixed
Set λini to a larger value (ablation)AutoZOOM-AE · MNIST and CIFAR-10 targeted attacksmean query count (initial success): MNIST 2,428.24 -> 729.65 -> 510.38; CIFAR-10 1,523.91 -> 332.43 -> 259.34Helped
Use random full-gradient estimation rather than coordinate-wise gradient estimationZOO · MNIST, CIFAR-10, and ImageNet targeted attacksmean query count (initial success): 16,533.30 -> 729.65; 11,662.80 -> 332.43; 2,226,405.04 (2.22M) -> 13,525.00Helped
Use AutoZOOM-BiLIN instead of ZOOZOO · MNIST, CIFAR-10, and ImageNet untargeted attacksmean query count (initial success): 7856.64 -> 98.82; 3957.76 -> 85.6; 271627.91 -> 1695.27Helped

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