Timezone: »

 
Poster
Adversarial Robustness with Non-uniform Perturbations
Ecenaz Erdemir · Jeffrey Bickford · Luca Melis · Sergul Aydore

Tue Dec 07 08:30 AM -- 10:00 AM (PST) @
in Poster Session 1 »

Robustness of machine learning models is critical for security related applications, where real-world adversaries are uniquely focused on evading neural network based detectors. Prior work mainly focus on crafting adversarial examples (AEs) with small uniform norm-bounded perturbations across features to maintain the requirement of imperceptibility. However, uniform perturbations do not result in realistic AEs in domains such as malware, finance, and social networks. For these types of applications, features typically have some semantically meaningful dependencies. The key idea of our proposed approach is to enable non-uniform perturbations that can adequately represent these feature dependencies during adversarial training. We propose using characteristics of the empirical data distribution, both on correlations between the features and the importance of the features themselves. Using experimental datasets for malware classification, credit risk prediction, and spam detection, we show that our approach is more robust to real-world attacks. Finally, we present robustness certification utilizing non-uniform perturbation bounds, and show that non-uniform bounds achieve better certification.

Keywords: Deep Learning · Optimization · Machine Learning · Robustness · Adversarial Robustness and Security

Author Information

Ecenaz Erdemir (Imperial College London)
Jeffrey Bickford (Amazon)
Luca Melis (AWS)
Sergul Aydore (AWS)

More from the Same Authors