![]() ![]() In an intriguing variation, researchers in 2010 proposed using CAPTCHAs to index ancient petroglyphs, computers not being very good at deciphering gestural sketches of reindeer scrawled on cave walls. Researchers have looked into asking users to identify objects in Magic Eye-like blotches. People have tried stymying image recognition by asking users to identify, say, pigs, but making the pigs cartoons and giving them sunglasses. Such cultural CAPTCHAs are aimed not just at bots, but at the humans working in overseas CAPTCHA farms solving puzzles for fractions of a cent. ![]() (You can imagine how well that went.) There have been proposals for trivia CAPTCHAs, and CAPTCHAs based on nursery rhymes common in the area where a user purportedly grew up. Researchers have tried asking users to classify images of people by facial expression, gender, and ethnicity. ![]() The assumption is that a bot will find it difficult to. Make sure you save the changes you’ve made. Here simple enable or disable the reCAPTCHA option as you like. Scroll until you see the invisible reCAPTCHA section. The literature on CAPTCHA is littered with false starts and strange attempts at finding something other than text or image recognition that humans are universally good at and machines struggle with. These CAPTCHA systems ask users to solve a simple mathematical problem such as, 4+4 or 13+5. The attacker can solve one CAPTCHA manually (e.g., Kei9t in the above screenshot), note down the corresponding captchasid (e.g., 47507941) and captchatoken (e.g. Here’s the process for turning off the reCAPTCHA for your site Navigate to the customisation tab on your business settings. ![]()
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