Is it human or computer? Defending e-commerce with Captchas

@article{Pope2005IsIH,
  title={Is it human or computer? Defending e-commerce with Captchas},
  author={Clark Pope and Khushpreet Kaur},
  journal={IT Professional},
  year={2005},
  volume={7},
  pages={43-49}
}
A Captcha - a completely automatic public Turing test to tell computers and humans apart - is a test that humans can pass but computer programs cannot; such tests are becoming key to defending e-commerce systems. By using a Captcha, for example, IT systems can permit only real people-rather than a spammer's script-to create a free e-mail account. This article explains the various types of Captchas and discusses their strengths and weaknesses as a security measure. It also lists sources for more… CONTINUE READING
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