Papers › An Algorithm for Out-Of-Distribution Attack to Neural Network Encoder

An Algorithm for Out-Of-Distribution Attack to Neural Network Encoder

17 Sep 2020arXiv:2009.08016archive 2025-07-28

Liang Liang, Linhai Ma, Linchen Qian, Jiasong Chen

Deep neural networks (DNNs), especially convolutional neural networks, have achieved superior performance on image classification tasks. However, such performance is only guaranteed if the input to a trained model is similar to the training samples, i.e., the input follows the probability distribution of the training set. Out-Of-Distribution (OOD) samples do not follow the distribution of training set, and therefore the predicted class labels on OOD samples become meaningless. Classification-based methods have been proposed for OOD detection; however, in this study we show that this type of method has no theoretical guarantee and is practically breakable by our OOD Attack algorithm because of dimensionality reduction in the DNN models. We also show that Glow likelihood-based OOD detection is breakable as well.

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liangbright/OOD_Attack_NN mentioned on GitHubpytorch report

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Tasks

Dimensionality ReductionGeneral ClassificationImage ClassificationOut of Distribution (OOD) Detectionimage-classification

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Methods

Activation NormalizationAffine CouplingGLOWInvertible 1x1 ConvolutionNormalizing Flows

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