CAPTCHAs and anti-CAPTCHA bots

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  • Currently very weak, simple calculus with non-distorted text for the variables
  • w:reCAPTCHA though that one other anti-CAPTCHA bot claimed to defeat this 60-65% of the time
  • KittenAuth
  • MSFT Azurra project Kitten & puppy CAPTCHA

anti-CAPTCHA bots[edit]