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Interpretability is a Kind of Safety: An Interpreter-based Ensemble for Adversary Defense

J. Wang, Y. Wu, M. Li, X. Lin, J. Wu, C. Li

in Proceedings of the 26th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining (KDD'20), 2020.

While having achieved great success in rich real-life applications, deep neural network (DNN) models have long been criticized for their vulnerability to adversarial attacks. Tremendous research efforts have been dedicated to mitigating the threats of adversarial attacks, but the essential trait of adversarial examples is not yet clear, and most existing methods are yet vulnerable to hybrid attacks and suffer from counterattacks. In light of this, in this paper, we first reveal a gradient-based correlation between sensitivity analysis-based DNN interpreters and the generation process of adversarial examples, which indicates the Achilles’s heel of adversarial attacks and sheds light on linking together the two long-standing challenges of DNN: fragility and unexplainability. We then propose an interpreter-based ensemble framework called X-Ensemble for robust adversary defense. X-Ensemble adopts a novel detection-rectification process and features in building multiple sub-detectors and a rectifier upon various types of interpretation information toward target classifiers. Moreover, X-Ensemble employs the Random Forests (RF) model to combine sub-detectors into an ensemble detector for adversarial hybrid attacks defense. The non-differentiable property of RF further makes it a precious choice against the counterattack of adversaries. Extensive experiments under various types of state-of-the-art attacks and diverse attack scenarios demonstrate the advantages of X-Ensemble to competitive baseline methods.

Interpretability is a Kind of Safety: An Interpreter-based Ensemble for Adversary Defense
wang2020interpretability.pdf
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The slides of this paper
PPT-Wu-KDD2020.pdf
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@inproceedings{wang2020interpretability,

  title={Interpretability is a Kind of Safety: An Interpreter-based Ensemble for Adversary Defense},

  author={Wang, Jingyuan and Wu, Yufan and Li, Mingxuan and Lin, Xin and Wu, Junjie and Li, Chao},

  booktitle={Proceedings of the 26th ACM SIGKDD International Conference on Knowledge Discovery \& Data Mining},

  pages={15--24},

  year={2020}

}