![]() If insufficient data is captured from the mouse movement, the 3rd generation reCAPTCHA may fall back onto a 2nd generation test. ![]() The checkbox approach uses reverse logic to differentiate between robots and humans because humans drag cursors along random paths and robots move cursors in direct paths across the screen. 3rd generation reCAPTCHA requires users to click on a checkbox certifying they are human (or not a robot). 2nd generation CAPTCHA required users to select images that match a certain described type. If the letters were not entered correctly, the user was asked to try again.īecause spammers were able to circumvent the original CAPTCHA strategy, new strategies were developed. ![]() ![]() Users needed to decipher the distorted characters and type them into a form field, then submit it. The classic CAPTCHA solver asked users to identify specific letters that have been distorted so that a bot would be unlikely to recognize them. CAPTCHA was first created as an attempt to block spam software from commenting on website pages or purchasing products in bulk. CAPTCHA forms are common on account sign-ups, online polls, and e-commerce checkouts. ![]()
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