Attack Smarter: Attention-Driven Fine-Grained Webpage Fingerprinting Attacks

• URL: http://arxiv.org/abs/2506.20082v1
• Date: Wed, 25 Jun 2025 01:45:55 GMT
• Title: Attack Smarter: Attention-Driven Fine-Grained Webpage Fingerprinting Attacks
• Authors: Yali Yuan, Weiyi Zou, Guang Cheng,
• Abstract summary: Website Fingerprinting (WF) attacks aim to infer which websites a user is visiting by analyzing traffic patterns.<n>WPF generalizes WF to large-scale environments by modeling subpages of the same site as distinct classes.<n>We propose an attention-driven fine-grained WPF attack, named ADWPF.
• Score: 10.525610722239152
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Website Fingerprinting (WF) attacks aim to infer which websites a user is visiting by analyzing traffic patterns, thereby compromising user anonymity. Although this technique has been demonstrated to be effective in controlled experimental environments, it remains largely limited to small-scale scenarios, typically restricted to recognizing website homepages. In practical settings, however, users frequently access multiple subpages in rapid succession, often before previous content fully loads. WebPage Fingerprinting (WPF) generalizes the WF framework to large-scale environments by modeling subpages of the same site as distinct classes. These pages often share similar page elements, resulting in lower inter-class variance in traffic features. Furthermore, we consider multi-tab browsing scenarios, in which a single trace encompasses multiple categories of webpages. This leads to overlapping traffic segments, and similar features may appear in different positions within the traffic, thereby increasing the difficulty of classification. To address these challenges, we propose an attention-driven fine-grained WPF attack, named ADWPF. Specifically, during the training phase, we apply targeted augmentation to salient regions of the traffic based on attention maps, including attention cropping and attention masking. ADWPF then extracts low-dimensional features from both the original and augmented traffic and applies self-attention modules to capture the global contextual patterns of the trace. Finally, to handle the multi-tab scenario, we employ the residual attention to generate class-specific representations of webpages occurring at different temporal positions. Extensive experiments demonstrate that the proposed method consistently surpasses state-of-the-art baselines across datasets of different scales.

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