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Working with colleagues from the University of Southampton and National Information and Communications Technology Australia (NICTA), Victor Naroditskiy PhD '09 has published findings that reveal a downside to crowdsourcing, particularly when competition is involved.

Beginning with the discovery that the openness of crowdsourcing makes it vulnerable to malicious behavior, the researchers arrive at some unexpected conclusions. For example, increasing the difficulty of an attack, they found, is costly, less efficient, and isn't an effective deterrent. 

 A news release and a link to the paper are available here.