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Identifier	000372942
Title	CensMon : A Web Censorship Monitor
Alternative Title	CensMon :Ένα σύστημα παρακολούθησης λογοκρισίας στο διαδίκτυο
Author	Σφακιανάκης, Ανδρέας Νικόλαος
Thesis advisor	Μαρκάτος, Ευάγγελος Ιωαννίδης, Σωτήριος
Abstract	The Internet has traditionally been the most free medium for publishing and accessing information. It is also quickly becoming the dominant medium for quick and easy access to news. It is therefore not surprising that there are significant efforts to censor certain news articles or even entire web sites. Furthermore, last year’s incidents of Arab Spring as well as SOPA and PIPA acts brought web censorship in the forefront of attention. Most existing sources of Internet censorship do not provide detailed technical information. They are mainly based on accessibility tests and a lot of current censorship measurement efforts are mostly conducted by journalists without technical background. As a result, there is a lack in measuring who censors what, how, when on an ongoing basis since what is blocked changes over time. In this thesis we present an approach to detect censorship in a technically sound way. First, we studied current filtering technologies as well as existing approaches to map web filtering. Then, we designed and implemented a web censorship monitor, called CensMon. CensMon is distributed in nature, operates automatically and does not rely on Internet users to report censored web sites, can differentiate access network failures from possible censorship, and uses multiple input streams to determine what kind of censored data to look for. Our evaluation shows that CensMon can successfully detect censored content and spot the filtering technique used by the censor.
Language	English
Subject	Censorship
	Network Neutrality
	Διαδίκτυο
	Λογοκρισία
Issue date	2012-03-16
Collection	School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
	Type of Work--Post-graduate theses
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