Padding-only Defenses Add Delay in Tor
Padding-only Defenses Add Delay in Tor
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仅填充防御会增加 Tor 的延迟
DOI:
10.1145/3559613.3563207
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Hopper, Nicholas
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文献类型:
--
作者:
Witwer, Ethan;Holland, James K.;Hopper, Nicholas
Website fingerprinting is an attack that uses size and timing characteristics of encrypted downloads to identify targeted websites. Since this can defeat the privacy goals of anonymity networks such as Tor, many algorithms to defend against this attack in Tor have been proposed in the literature. These algorithms typically consist of some combination of the injection of dummy "padding'' packets with the delay of actual packets to disrupt timing patterns. For usability reasons, Tor is intended to provide low latency; as such, many authors focus on padding-only defenses in the belief that they are "zero-delay.'' We demonstrate through Shadow simulations that by increasing queue lengths, padding-only defenses add delay when deployed network-wide, so they should not be considered "zero-delay.'' We further argue that future defenses should also be evaluated using network-wide deployment simulations.
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DOI:
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发表时间:
2021-02
期刊:
ArXiv
影响因子:
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作者:
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DOI:
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期刊:
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DOI:
10.1109/wnyipw.2018.8576379
发表时间:
2018
期刊:
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影响因子:
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影响因子:
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通讯作者:
Hopper, Nicholas