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Hidden Poison: Machine Unlearning Enables Camouflaged Poisoning Attacks

NeurIPS 2023 · Adversarial robustness and security › Attacks on text and graphs · approach: Clean-label data poisoning

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add gradient-matched poison and camouflage points, then remove the camouflage points through unlearningCamouflaged poisoning attack · CIFAR-10, Imagenette, Imagewooftargeted attack success: Camouflaging succeeded at least 70% of the time for VGG-11, VGG-16, ResNet-18, and ResNet-34; 100% on Imagenette with VGHelped
Use gradient-matching rather than label-flipping camouflage (ablation)Linear SVM camouflaged poisoning · Binary-CIFAR-10camouflaging success: 71.5% vs 100% at ε=8; 40% vs 70% at ε=16Mixed
Increase camouflage budget from 0.5% to 1% with poison budget fixed at 1% (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 40% -> 80%Helped
Increase camouflage budget from 1% to 1.5% with poison budget fixed at 1% (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 80% -> 80%No clear effect
Increase poison budget from 1% to 1.5% while keeping camouflage budget at 1% (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 80% -> 20%Hurt
Randomly delete poison and camouflage samples (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 75%, 33%, 100%, 80%, 100% with 5%, 10%, 20%, 30%, 40% removedMixed
Add horizontal-flip augmentation (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 20% -> 33%Helped
Add horizontal flips and random rotations (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10camouflaging success: 20% -> 100%Helped
Add data augmentation during training and retraining (ablation)Camouflaged poisoning on ResNet-18 · CIFAR-10poisoning success: 100% -> 86% -> 60%Hurt

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