2019

HopSkipJumpAttack: A Query-Efficient Decision-Based Attack

Chen, Jianbo, Jordan, Michael I., Wainwright, Martin J.

Understand

The goal of a decision-based adversarial attack on a trained model is to generate adversarial examples based solely on observing output labels returned by the targeted model.

  • We develop HopSkipJumpAttack, a family of algorithms based on a novel estimate of the gradient direction using binary information at the decision boundary.
  • The proposed family includes both untargeted and targeted attacks optimized for $\ell_2$ and $\ell_\infty$ similarity metrics respectively.
  • Theoretical analysis is provided for the proposed algorithms and the gradient direction estimate.

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