Trufflehunter: Cache Snooping Rare Domains at Large Public DNS Resolvers
Trufflehunter: Cache Snooping Rare Domains at Large Public DNS Resolvers
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Trufflehunter:在大型公共 DNS 解析器中缓存监听稀有域名
DOI:
10.1145/3419394.3423640
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Schulman, Aaron
中科院分区:
文献类型:
--
作者:
Randall, Audrey;Liu, Enze;Akiwate, Gautam;Padmanabhan, Ramakrishna;Voelker, Geoffrey M.;Savage, Stefan;Schulman, Aaron
This paper presents and evaluates Trufflehunter, a DNS cache snooping tool for estimating the prevalence of rare and sensitive Internet applications. Unlike previous efforts that have focused on small, misconfigured open DNS resolvers, Trufflehunter models the complex behavior of large multi-layer distributed caching infrastructures (e.g., such as Google Public DNS). In particular, using controlled experiments, we have inferred the caching strategies of the four most popular public DNS resolvers (Google Public DNS, Cloudflare Quad1, OpenDNS and Quad9). The large footprint of such resolvers presents an opportunity to observe rare domain usage, while preserving the privacy of the users accessing them. Using a controlled testbed, we evaluate how accurately Trufflehunter can estimate domain name usage across the U.S. Applying this technique in the wild, we provide a lower-bound estimate of the popularity of several rare and sensitive applications (most notably smartphone stalkerware) which are otherwise challenging to survey.
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发表时间:
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期刊:
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