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Identifier 000368357
Title A Lightweight Censorship-Resistant Web Access Architecture
Alternative Title Μια ελαφριά, ανθεκτική στη λογοκρισία, αρχιτεκτονική πρόσβασης στο WEB
Author Κονταξής, Γεώργιος Στυλιανός
Thesis advisor Μαρκάτος, Ευάγγελος
Collaborator Ιωαννίδης, Σωτήρης
Collaborator Παραδοπούλη, Μαρία
Abstract Most anti-censorship Web access mechanisms rely on a limited set of proxy nodes whose information is publicly available and, thus, communication with them may be easily blocked. In this paper, we present an architecture that leverages the Web to create an access mechanism that is highly-resilient to the blocking of its components. Specifically, we present how existing Web services can be leveraged as coordination and storage components to support a swarm of lightweight nodes that serves Web access requests and is run by volunteers inside their Web browser. Clients of our system, that desire unobstructed access to a Web site, post the respective URL on a Web service, such as a blog or a social network, acting as a coordination point. Carefully crafted JavaScript code, enables a continually changing body of volunteers, who reside outside the restricted zone, to fetch the content of the requested URL and store it on an uncensored user-content hosting service, from which the client ultimately accesses it. As our approach is not tied to a specific service but rather uses a plethora of existing Web services, we argue that a censorship authority will be unwilling or unable to monitor and block them all without greatly impairing user connectivity to the Internet. We explore the strengths, limitations and performance and security of our system.
Language English
Subject Censorship
Security
WEB
Ασφάλεια
Λογοκρισία
Issue date 2011-07-15
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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