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Roya Ensafi

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titleconferencedate
Broken Promises: Who's Accountable When VPNs Fail?USENIX Security '262026-08-12
Systematic research over five years tests over a thousand users, nine VPN providers and hundreds of desktop and mobile apps and finds concrete failures: kill…
Talk on
Quack: Scalable Remote Measurement of Application-Layer CensorshipUSENIX Security '182018-08-15
Quack is a remote measurement system that uses the RFC 862 echo servers (port 7) as reflectors to detect application‑layer blocking, operating on ~47,000…
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Global Measurement of DNS Manipulation26th USENIX Security Symposium (USENIX Security '17)2017-08-16
A deployed measurement system called Iris performs ethical, repeated DNS queries using scanned infrastructure resolvers found with ZMap and validated with…
Talk on
Identifying and Characterizing Sybils in the Tor NetworkUSENIX Security '162016-08-10
Analyzes nine years (~100 GB) of hourly Tor consensuses plus active scans to detect coordinated relays, using a tool called sybilhunter that produces CSVs and…
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