“I am not a robot” – Captchas are getting harder as machines get smarter
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CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a challenge-response authentication security technique. They are riddles designed to protect websites from malicious bots. By requiring one to pass a brief test to verify that they are a human and not a computer attempting to access a password-protected account, CAPTCHA helps safeguard users against