Institutional privacy risks in sharing DNS data
Institutional privacy risks in sharing DNS data
复制标题
共享 DNS 数据的机构隐私风险
DOI:
10.1145/3472305.3472324
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Heidemann, John
中科院分区:
文献类型:
--
作者:
Imana, Basileal;Korolova, Aleksandra;Heidemann, John
The Domain Name System (DNS) is used in every website visit and e-mail transmission, so privacy is an obvious concern. In DNS, users ask recursive resolvers (or "recursives") to make queries on their behalf. Prior analysis of DNS privacy focused on privacy risks to individual end-users, mainly in traffic between users and recursives. Recursives cache and aggregate traffic for many users, factors that are commonly assumed to protect end-user privacy above the recursive. We documentinstitutional privacyas a new risk posed by DNS data collected at authoritative servers, even after caching and aggregation by DNS recursives. We are the first to demonstrate this risk by looking at leaks of e-mail exchanges which show communications patterns, and leaks from accessing sensitive websites, both of which can harm an institution's public image. We define a methodology to identify queries from institutions and identify leaks. We show the current practices of prefix-preserving anonymization of IP addresses and aggregation above the recursive are not sufficient to protect institutional privacy, suggesting the need for novel approaches. We demonstrate this claim by applying our methodology to real-world traffic from DNS servers that use partial prefix-preserving anonymization. Our work prompts additional privacy considerations for institutions that run their own resolvers and authoritative server operators that log and share DNS data.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1109/tnet.2017.2717965
发表时间:
2017
期刊:
IEEE/ACM Transactions on Networking
影响因子:
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DOI:
--
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期刊:
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影响因子:
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DOI:
--
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期刊:
影响因子:
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影响因子:
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