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    SOUPS
    2009
    ACM
    154views Security Privacy» more  SOUPS 2009»
    Balancing usability and security in a video CAPTCHA
    13 years 11 months ago
    Balancing usability and security in a video CAPTCHA
    Download  cups.cs.cmu.edu
    We present a technique for using content-based video labeling as a CAPTCHA task. Our CAPTCHAs are generated from YouTube videos, which contain labels (tags) supplied by the person...
    Kurt Alfred Kluever, Richard Zanibbi
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    SIGECOM
    2008
    ACM
    130views ECommerce» more  SIGECOM 2008»
    Crowdsourcing and knowledge sharing: strategic user behavior on taskcn
    13 years 5 months ago
    Crowdsourcing and knowledge sharing: strategic user behavior on taskcn
    Download  www-personal.umich.edu
    Witkeys are a thriving type of web-based knowledge sharing market in China, supporting a form of crowdsourcing. In a Witkey site, users offer a small award for a solution to a tas...
    Jiang Yang, Lada A. Adamic, Mark S. Ackerman
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