A Unified Framework for Adversarial Attack and Defense in Constrained Feature Space

• URL: http://arxiv.org/abs/2112.01156v1
• Date: Thu, 2 Dec 2021 12:05:27 GMT
• Title: A Unified Framework for Adversarial Attack and Defense in Constrained Feature Space
• Authors: Thibault Simonetto, Salijona Dyrmishi, Salah Ghamizi, Maxime Cordy, Yves Le Traon
• Abstract summary: We propose a unified framework to generate feasible adversarial examples that satisfy given domain constraints. Our framework forms the starting point for research on constrained adversarial attacks and provides relevant baselines and datasets that research can exploit.
• Score: 13.096022606256973
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The generation of feasible adversarial examples is necessary for properly assessing models that work on constrained feature space. However, it remains a challenging task to enforce constraints into attacks that were designed for computer vision. We propose a unified framework to generate feasible adversarial examples that satisfy given domain constraints. Our framework supports the use cases reported in the literature and can handle both linear and non-linear constraints. We instantiate our framework into two algorithms: a gradient-based attack that introduces constraints in the loss function to maximize, and a multi-objective search algorithm that aims for misclassification, perturbation minimization, and constraint satisfaction. We show that our approach is effective on two datasets from different domains, with a success rate of up to 100%, where state-of-the-art attacks fail to generate a single feasible example. In addition to adversarial retraining, we propose to introduce engineered non-convex constraints to improve model adversarial robustness. We demonstrate that this new defense is as effective as adversarial retraining. Our framework forms the starting point for research on constrained adversarial attacks and provides relevant baselines and datasets that future research can exploit.

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