No-Box Universal Adversarial Perturbations Against Image Classifiers via Artificial Textures

Recent advancements in adversarial attack research have seen a transition from white-box to black-box and even no-box threat models, greatly enhancing the practicality of these attacks. However, existing no-box attacks focus on instance-specific perturbations, leaving more powerful universal adversarial perturbations (UAPs) unexplored. This study addresses a crucial question: can UAPs be generated under a no-box threat model? Our findings provide an affirmative answer with a texture-based method. Artificially crafted textures can act as UAPs, termed Texture-Adv. With a modest density and a fixed budget for perturbations, it can achieve an attack success rate of 80% under the constraint of l infinity = 10/255. In addition, Texture-Adv can also take effect under traditional black-box threat models. Building upon a phenomenon associated with dominant labels, we utilize Texture-Adv to develop a highly efficient decision-based attack strategy, named Adv-Pool. This approach creates and traverses a set of Texture-Adv instances with diverse classification distributions, significantly reducing the average query budget to less than 1.3, which is near the 1-query lower bound for decision-based attacks. Moreover, we empirically demonstrate that Texture-Adv, when used as a starting point, can enhance the success rates of existing transfer attacks and the efficiency of decision-based attacks. The discovery suggests its potential as an effective starting point for various adversarial attacks while preserving the original constraints of their threat models.