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arXiv 1109.0097cs.CR
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基于远程流量分析的网站检测

Website Detection Using Remote Traffic Analysis

Xun Gong, Negar Kiyavash, Nabíl Schear, Nikita Borisov

摘要:

最近在流量分析方面的工作表明,通过侧信道泄漏的流量模式可以用于恢复重要的语义信息。例如,攻击者可以通过监视数据包大小分布来找出用户正在访问哪个网站或网站上的哪个页面。我们表明,流量分析是一个更大的威胁,隐私比以前认为,通过引入一种新的攻击,可以远程进行。特别是,我们表明,进行流量分析,对手不需要直接观察的流量模式。相反,他们可以通过从一个遥远的有利位置发送探测器来获得足够的信息,该位置利用路由器中的排队侧信道。为了证明这种远程流量分析的威胁,我们研究了一个远程网站检测攻击,对家庭宽带用户。由于远程观察到的交通模式比使用以前的计划直接本地交通监测的基础上获得的噪音更大,我们采取了动态时间规整(DTW)为基础的方法来检测指纹从同一个网站。作为网站指纹的一个新的转折,我们考虑网站检测攻击,攻击者的目的是找出用户是否浏览特定的网站,及其隐私影响。我们的实验表明,虽然攻击的成功是高度可变的,这取决于目标网站,对于一些网站非常低的出错率。我们还展示了如何可以使用这样的网站检测来deanonymize留言板用户。

英文摘要:

Recent work in traffic analysis has shown that traffic patterns leaked through side channels can be used to recover important semantic information. For instance, attackers can find out which website, or which page on a website, a user is accessing simply by monitoring the packet size distribution. We show that traffic analysis is even a greater threat to privacy than previously thought by introducing a new attack that can be carried out remotely. In particular, we show that, to perform traffic analysis, adversaries do not need to directly observe the traffic patterns. Instead, they can gain sufficient information by sending probes from a far-off vantage point that exploits a queuing side channel in routers. To demonstrate the threat of such remote traffic analysis, we study a remote website detection attack that works against home broadband users. Because the remotely observed traffic patterns are more noisy than those obtained using previous schemes based on direct local traffic monitoring, we take a dynamic time warping (DTW) based approach to detecting fingerprints from the same website. As a new twist on website fingerprinting, we consider a website detection attack, where the attacker aims to find out whether a user browses a particular web site, and its privacy implications. We show experimentally that, although the success of the attack is highly variable, depending on the target site, for some sites very low error rates. We also show how such website detection can be used to deanonymize message board users.

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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