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UID:384@lincs.fr
DTSTART;TZID=Europe/Paris:20180411T140000
DTEND;TZID=Europe/Paris:20180411T150000
DTSTAMP:20180515T061200Z
URL:https://www.lincs.fr/events/tba-9/
SUMMARY:Open Web Proxies: analysis\, threats and opportunities
DESCRIPTION:Open web proxies promise anonymity and censorship circumvention
 at no cost. Several websites publish lists of free proxies organized by
 country\, anonymity level\, and performance. These lists index hundreds of
 thousand of hosts discovered via automated tools and crowd-sourcing. A
 complex free proxy ecosystem has been forming over the years\, of which
 very little is known. In this talk we shed light on this ecosystem via a
 distributed measurement platform that leverages both active and passive
 measurements. Active measurements are carried out by an infrastructure we
 name ProxyTorrent that discover free proxies\, assess their performance\,
 and detect potential malicious activities. Passive measurements relate to
 proxy performance and usage in the wild are accomplished by means of a
 Chrome plugin named Ciao. ProxyTorrent has been running since January
 2017\, monitoring up to 200\,000 free proxies. Ciao was launched in March
 2017 and has thus far served roughly 3\,000 users and generated 3 TB of
 traffic. Our analysis shows that less than 2% of the proxies announced on
 the Web indeed proxy traffic on behalf of users\; further\, only half of
 these proxies have decent performance and can be used reliably. Around 10%
 of the working proxies exhibit malicious behaviors\, e.g.\, ads injection
 and TLS interception\, and these proxies are also the ones providing the
 best performance. Through the analysis of more than 3 TB of proxied
 traffic\, we show that web browsing is the primary user activity.
 Geo-blocking avoidance is not a prominent use-case\, with the exception of
 proxies located in countries hosting popular geo-blocked content. In
 addition to those findings\, Open Web proxies\, and more generally open
 resources on the internet\, provide several opportunities. We will discuss
 few use cases we are addressing and focus on one of them\, i.e.  FreeLab:
 A Free Experimentation Platform. The key idea of FreeLab is that
 experiments run directly at its user machines\, while traffic is relayed by
 free vantage points in the Internet (web and SOCKS proxies\, and DNS
 resolvers).
CATEGORIES:Seminars,Youtube
LOCATION:Doctoral Training Center (EIT Digital)\, 23\, avenue d'Italie\,
 Paris\, 75013\, France
GEO:48.8283983;2.3568972000000485
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=23\, avenue d'Italie\,
 Paris\, 75013\, France;X-APPLE-RADIUS=100;X-TITLE=Doctoral Training Center
 (EIT Digital):geo:48.8283983,2.3568972000000485
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TZID:Europe/Paris
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