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Title:Trustworthy and scalable anonymous communication
Author(s):Mittal, Prateek
Director of Research:Borisov, Nikita
Doctoral Committee Chair(s):Borisov, Nikita
Doctoral Committee Member(s):Caesar, Matthew C.; Danezis, George; Kumar, P. R.; Vaidya, Nitin H.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):privacy
anonymity
social networks
Sybil attacks
Abstract:The architectures of deployed anonymity systems such as that of the Tor network suffer from the problems of (a) limited scalability, (b) reliance on a few central points of trust, and (c) trust issues due to Sybil attack. In this thesis, we investigate the design of novel approaches to anonymous communication that are scalable, decentralized, and Sybil-resilient. First, we begin by investigating security vulnerabilites in existing P2P anonymity systems, and find fundamental limitations in their designs. Second, we propose novel protocols for P2P anonymous communication that can successfully overcome these limitations. Third, we describe a protocol for detecting malicious Sybil identities using information about social network trust relationships. Fourth, we present protection mechanisms for DHTs that also leverage social network trust relationships to defend against the Sybil attack while preserving the privacy of social contacts and providing a basis for pseudonymous communication. Finally, we describe a protocol for trustworthy and scalable anonymous communication that can directly leverage users’ trusted social contacts. We evaluate the effectiveness of our protocols using theoretical analysis, simulations, implementations and a Facebook application.
Issue Date:2012-05-22
URI:http://hdl.handle.net/2142/31206
Rights Information:Copyright 2012 Prateek Mittal
Date Available in IDEALS:2012-05-22
Date Deposited:2012-05


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