Waiting for Anonymity: Understanding Delays in the Tor Overlay
Waiting for Anonymity: Understanding Delays in the Tor Overlay
复制标题
等待匿名：了解 Tor 覆盖中的延迟
DOI：
10.1109/p2p.2010.5569995
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. Ross
中科院分区：
文献类型：
--
作者：
Prithula Dhungel;Moritz Steiner;Ivinko Rimac;V. Hilt;K. Ross
虽然Tor是提供匿名服务的最广泛使用的覆盖层，但其用户通常会遇到非常高的延迟。由于Tor的大部分用途是用于对延迟敏感的Web应用程序，因此减少Tor的延迟至关重要。为了朝着这个方向迈出重要的一步，我们寻求对Tor延迟的深入了解。通过在短时间窗口内拍摄整个Tor网络的快照，我们能够研究整个路由器群体的延迟分布。我们还监控单个Tor路由器在很长一段时间内引入的延迟。我们的研究结果表明，除了路由器引入的延迟，覆盖网络延迟也在Tor中的延迟中起着重要作用。我们还观察到，在任何时候，不同路由器引入的延迟都存在巨大差异。我们的研究结果揭示了Tor系统行为的关键性能特征，并为提高Tor性能提供了有价值的见解。
Although Tor is the most widely used overlay for providing anonymity services, its users often experience very high delays. Because much of Tor usage is for Web applications, which are sensitive to latency, it is critical to reduce delays in Tor. To take an important step in this direction, we seek an in-depth understanding of delays in Tor. By taking snapshots of the entire Tor network within a short time window, we are able to study the delay distribution of the entire router population. We also monitor delays introduced by individual Tor routers over extended periods of time. Our results indicate that apart from delays introduced by routers, overlay network latency also plays a significant role in delays in Tor. We have also observed that at any time, there exist huge differences in the delays introduced by different routers. Our results reveal key performance characteristics of Tor system behavior and provide valuable insights for improving the Tor performance.