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Publication Detail
The wisdom of crowds: Attacks and optimal constructions
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Conference Proceeding
  • Authors:
    Danezis G, Diaz C, Käsper E, Troncoso C
  • Publication date:
    02/11/2009
  • Pagination:
    406, 423
  • Journal:
    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
  • Volume:
    5789 LNCS
  • Status:
    Published
  • Print ISSN:
    0302-9743
Abstract
We present a traffic analysis of the ADU anonymity scheme presented at ESORICS 2008, and the related RADU scheme. We show that optimal attacks are able to de-anonymize messages more effectively than believed before. Our analysis applies to single messages as well as long term observations using multiple messages. The search of a "better" scheme is bound to fail, since we prove that the original Crowds anonymity system provides the best security for any given mean messaging latency. Finally we present D-Crowds, a scheme that supports any path length distribution, while leaking the least possible information, and quantify the optimal attacks against it. © 2009 Springer Berlin Heidelberg.
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