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The “Completely Automated Public Turing test to tell Computers and Humans Apart” (CAPTCHA) is officially a mere “security measure,” asking users of “free” web services to identify themselves as human beings. Differentiating these users from bots, it silently forces users to do jobs intelligent machines cannot yet do (well enough). The hidden labor of identifying hardly legible words, blurred pictures or faces is only the tip of the iceberg. In his “Silent Works” video talk Jose Miguel Calatayud tackles this largely uncontested labor regime.
