🤖 AI Summary
Evaluating adversarial robustness of deep neural networks (e.g., ResNet-18, DenseNet-121, Swin Transformer V2, ViT) under black-box settings remains challenging due to limited model access and gradient inaccessibility. To address this, we propose two novel black-box attack algorithms: Affine Transformation Attack (ATA) and Affine Genetic Attack (AGA). Both methods synergistically integrate randomized affine transformations, genetic optimization, noise perturbations, and a dedicated attack scoring function to efficiently generate adversarial examples under both untargeted and targeted attack settings. Extensive evaluation across Tiny ImageNet, Caltech-256, and Food-101 demonstrates that our approaches significantly improve attack success rates—by up to 8.82%—outperforming state-of-the-art black-box attacks. Moreover, they exhibit strong cross-architecture generalization and enable verifiable robustness assessment. This work establishes a new paradigm for systematic vulnerability analysis and defense-oriented evaluation of vision models in realistic black-box scenarios.
📝 Abstract
Deep neural networks currently dominate many fields of the artificial intelligence landscape, achieving state-of-the-art results on numerous tasks while remaining hard to understand and exhibiting surprising weaknesses. An active area of research focuses on adversarial attacks, which aim to generate inputs that uncover these weaknesses. However, this proves challenging, especially in the black-box scenario where model details are inaccessible. This paper explores in detail the impact of such adversarial algorithms on ResNet-18, DenseNet-121, Swin Transformer V2, and Vision Transformer network architectures. Leveraging the Tiny ImageNet, Caltech-256, and Food-101 datasets, we benchmark two novel black-box iterative adversarial algorithms based on affine transformations and genetic algorithms: 1) Affine Transformation Attack (ATA), an iterative algorithm maximizing our attack score function using random affine transformations, and 2) Affine Genetic Attack (AGA), a genetic algorithm that involves random noise and affine transformations. We evaluate the performance of the models in the algorithm parameter variation, data augmentation, and global and targeted attack configurations. We also compare our algorithms with two black-box adversarial algorithms, Pixle and Square Attack. Our experiments yield better results on the image classification task than similar methods in the literature, achieving an accuracy improvement of up to 8.82%. We provide noteworthy insights into successful adversarial defenses and attacks at both global and targeted levels, and demonstrate adversarial robustness through algorithm parameter variation.