A CAPTCHA (/ˈkæp.tʃə/ KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks...

reCAPTCHA Inc. is a CAPTCHA system owned by Google. It enables web hosts to distinguish between human and automated access to websites. The original version...

NuCaptcha is an early fraud detection service which utilises behavior analytics to provision threat appropriate, animated video CAPTCHAs. NuCaptcha is...

one of the pioneers of crowdsourcing. He is the founder of the company reCAPTCHA, which was sold to Google in 2009, and the co-founder and CEO of Duolingo...

of malicious internet bots, AltaVista implemented the first practical CAPTCHA schemes to protect against fraudulent account registrations. They implemented...

security authentication. These include software technologies such CAPTCHA and reCAPTCHA, as well as hardware technologies such as: Radar technology Image...

technique is the use of CAPTCHA. Examples of providers include Recaptcha, Minteye, Solve Media and NuCaptcha. However, captchas are not foolproof in preventing...

OR-Tools PageSpeed Plugin for Eclipse Programmable Search Engine Public DNS reCAPTCHA Schema.org Search Console Sitemaps Swiffy Tesseract (software) Trendalyzer...

reverse CAPTCHA with some accuracy by analysing patterns in the generating engine started being developed soon after the creation of CAPTCHA. In 2013...

as keystroke replays and a captcha anticheat that requires users who achieve over 100 wpm in a race to complete a CAPTCHA. When completed successfully...