Detecting Patch Adversarial Attacks with Image Residuals

• URL: http://arxiv.org/abs/2002.12504v2
• Date: Mon, 2 Mar 2020 16:19:17 GMT
• Title: Detecting Patch Adversarial Attacks with Image Residuals
• Authors: Marius Arvinte, Ahmed Tewfik, Sriram Vishwanath
• Abstract summary: A discriminator is trained to distinguish between clean and adversarial samples. We show that the obtained residuals act as a digital fingerprint for adversarial attacks. Results show that the proposed detection method generalizes to previously unseen, stronger attacks.
• Score: 9.169947558498535
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce an adversarial sample detection algorithm based on image residuals, specifically designed to guard against patch-based attacks. The image residual is obtained as the difference between an input image and a denoised version of it, and a discriminator is trained to distinguish between clean and adversarial samples. More precisely, we use a wavelet domain algorithm for denoising images and demonstrate that the obtained residuals act as a digital fingerprint for adversarial attacks. To emulate the limitations of a physical adversary, we evaluate the performance of our approach against localized (patch-based) adversarial attacks, including in settings where the adversary has complete knowledge about the detection scheme. Our results show that the proposed detection method generalizes to previously unseen, stronger attacks and that it is able to reduce the success rate (conversely, increase the computational effort) of an adaptive attacker.

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