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arXiv 2007.03198cs.LGcs.CVstat.ML
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区域图像扰动降低对抗样本的$L_p$范数,同时保持模型到模型的可移植性

Regional Image Perturbation Reduces $L_p$ Norms of Adversarial Examples While Maintaining Model-to-model Transferability

Ghent University(根特大学);VIB Inflammation Research Center(VIB炎症研究中心);imec(比利时微电子研究中心)

Utku Ozbulak, Jonathan Peck, Wesley De Neve, Bart Goossens, Yvan Saeys, Arnout Van Messem

摘要:

区域性的对抗攻击通常依赖于复杂的方法来产生对抗性扰动,因此很难将其效果与已知的攻击进行比较。在这项研究中,我们表明,有效的区域扰动可以产生不诉诸复杂的方法。我们开发了一种非常简单的区域对抗扰动攻击方法,使用交叉熵符号,这是对抗机器学习中最常用的损失之一。我们在ImageNet上使用多个模型进行的实验表明,平均而言,当扰动应用于局部图像区域时,生成的对抗性示例的$76\%$保持了模型到模型的可转移性。根据所选区域,这些局部对抗性示例与其非局部对应物相比需要显著更少的$L_p$范数失真(对于$p \in \{0, 2, \infty\}$)。因此,这些本地化攻击有可能破坏根据上述规范要求鲁棒性的防御。

英文摘要:

Regional adversarial attacks often rely on complicated methods for generating adversarial perturbations, making it hard to compare their efficacy against well-known attacks. In this study, we show that effective regional perturbations can be generated without resorting to complex methods. We develop a very simple regional adversarial perturbation attack method using cross-entropy sign, one of the most commonly used losses in adversarial machine learning. Our experiments on ImageNet with multiple models reveal that, on average, $76\%$ of the generated adversarial examples maintain model-to-model transferability when the perturbation is applied to local image regions. Depending on the selected region, these localized adversarial examples require significantly less $L_p$ norm distortion (for $p \in \{0, 2, \infty\}$) compared to their non-local counterparts. These localized attacks therefore have the potential to undermine defenses that claim robustness under the aforementioned norms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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