2026-09-20T22:17:41Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/31206 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Borisov, Nikita Borisov, Nikita Caesar, Matthew C. Danezis, George Kumar, P.R. Vaidya, Nitin H. Mittal, Prateek 2012-05-22T00:35:36Z 2012-05-22T00:35:36Z 2012-05 2012-05-22T00:35:36Z 2012-05 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. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-04-14T16:33:06Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Mittal_Prateek.pdf: 1520551 bytes, checksum: fe53057bac2c6cfa4a703d1ec1ea2ff0 (MD5) Made available in DSpace on 2012-05-22T00:35:36Z (GMT). No. of bitstreams: 2 Mittal_Prateek.pdf: 1520551 bytes, checksum: fe53057bac2c6cfa4a703d1ec1ea2ff0 (MD5) license.txt: 4063 bytes, checksum: fd035fccd7c1cb726dad98a67720cf43 (MD5) http://hdl.handle.net/2142/31206 en Copyright 2012 Prateek Mittal privacy anonymity social networks Sybil attacks Trustworthy and scalable anonymous communication text Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Electr & Computer Eng-UIUC 10KS1200PHD