arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2512.00436cs.CRcs.LGcs.NI
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RECTor: 一种鲁棒且高效的Tor流量相关攻击

RECTor: Robust and Efficient Correlation Attack on Tor

IEEE Communications Magazine(IEEE通信杂志)

Binghui Wu, Dinil Mon Divakaran, Levente Csikor, Mohan Gurusamy

AI总结:

RECTor通过基于注意力的多实例学习和GRU时间编码,高效且鲁棒地处理流量相关攻击,显著提升在高噪声环境下的识别性能和可扩展性。

摘要:

Tor是一个广泛使用的匿名网络,通过加密中继路由流量来隐藏用户身份,但仍然容易受到通过匹配入站和出站流量模式来去匿名化的流量相关攻击。然而,现有的相关方法存在两个主要限制:对噪声和部分观察的鲁棒性有限,以及由于计算成本高昂的成对匹配导致的可扩展性差。为了解决这些挑战,我们提出了RECTor,一种在现实条件下用于流量相关分析的基于机器学习的框架。RECTor采用基于注意力的多实例学习(MIL)和基于GRU的时间编码来提取鲁棒的流量表示,即使流量数据不完整或被混淆。这些嵌入通过Siamese网络映射到共享空间,并通过近邻搜索高效匹配。实证评估显示,RECTor在高噪声条件下比最先进的基线方法如DeepCorr、DeepCOFFEA和FlowTracker表现更优,真阳性率提高高达60%,并且训练和推理时间减少超过50%。此外,RECTor展示了良好的可扩展性:推理成本随着流量数量的增加而近似线性增长。这些发现揭示了Tor匿名模型的关键漏洞,并突显了需要高级模型感知防御的必要性。

英文摘要:

Tor is a widely used anonymity network that conceals user identities by routing traffic through encrypted relays, yet it remains vulnerable to traffic correlation attacks that deanonymize users by matching patterns in ingress and egress traffic. However, existing correlation methods suffer from two major limitations: limited robustness to noise and partial observations, and poor scalability due to computationally expensive pairwise matching. To address these challenges, we propose RECTor, a machine learning-based framework for traffic correlation under realistic conditions. RECTor employs attention-based Multiple Instance Learning (MIL) and GRU-based temporal encoding to extract robust flow representations, even when traffic data is incomplete or obfuscated. These embeddings are mapped into a shared space via a Siamese network and efficiently matched using approximate nearest neighbor (aNN) search. Empirical evaluations show that RECTor outperforms state-of-the-art baselines such as DeepCorr, DeepCOFFEA, and FlowTracker, achieving up to 60% higher true positive rates under high-noise conditions and reducing training and inference time by over 50%. Moreover, RECTor demonstrates strong scalability: inference cost grows near-linearly as the number of flows increases. These findings reveal critical vulnerabilities in Tor's anonymity model and highlight the need for advanced model-aware defenses.

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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