Boosting Transferability in Vision-Language Attacks via Diversification along the Intersection Region of Adversarial Trajectory

• URL: http://arxiv.org/abs/2403.12445v3
• Date: Sun, 14 Jul 2024 15:58:57 GMT
• Title: Boosting Transferability in Vision-Language Attacks via Diversification along the Intersection Region of Adversarial Trajectory
• Authors: Sensen Gao, Xiaojun Jia, Xuhong Ren, Ivor Tsang, Qing Guo,
• Abstract summary: Vision-language pre-training models are susceptible to multimodal adversarial examples (AEs) We propose using diversification along the intersection region of adversarial trajectory to expand the diversity of AEs. To further mitigate the potential overfitting, we direct the adversarial text deviating from the last intersection region along the optimization path.
• Score: 8.591762884862504
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Vision-language pre-training (VLP) models exhibit remarkable capabilities in comprehending both images and text, yet they remain susceptible to multimodal adversarial examples (AEs). Strengthening attacks and uncovering vulnerabilities, especially common issues in VLP models (e.g., high transferable AEs), can advance reliable and practical VLP models. A recent work (i.e., Set-level guidance attack) indicates that augmenting image-text pairs to increase AE diversity along the optimization path enhances the transferability of adversarial examples significantly. However, this approach predominantly emphasizes diversity around the online adversarial examples (i.e., AEs in the optimization period), leading to the risk of overfitting the victim model and affecting the transferability. In this study, we posit that the diversity of adversarial examples towards the clean input and online AEs are both pivotal for enhancing transferability across VLP models. Consequently, we propose using diversification along the intersection region of adversarial trajectory to expand the diversity of AEs. To fully leverage the interaction between modalities, we introduce text-guided adversarial example selection during optimization. Furthermore, to further mitigate the potential overfitting, we direct the adversarial text deviating from the last intersection region along the optimization path, rather than adversarial images as in existing methods. Extensive experiments affirm the effectiveness of our method in improving transferability across various VLP models and downstream vision-and-language tasks.

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