Top "Captcha" questions

Captcha is a type of challenge-response test used in computing as an attempt to ensure that the response is given by a human being and not generated by a computer.

How does Google reCAPTCHA v2 work behind the scenes?

This post refers to Google ReCaptcha v2 (not the latest version) Recently Google introduced a simplified "captcha" verification system (video) …

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How do I show multiple recaptchas on a single page?

I have 2 forms on a single page. One of the forms has a recaptcha displaying all the time. The other …

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ReCaptcha API v2 Styling

I have not had much success finding how to style Google's new recaptcha (v2). The eventual goal is to make …

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Practical non-image based CAPTCHA approaches?

It looks like we'll be adding CAPTCHA support to Stack Overflow. This is necessary to prevent bots, spammers, and other …

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Has reCaptcha been cracked / hacked / OCR'd / defeated / broken?

Have any programming methods have been used to defeat reCAPTCHA? I'm interested in seeing evidence and potentially demonstrations that reCAPTCHA …

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How do I add a CAPTCHA to my PHP form?

My knowledge of php is not good and I need help. I have this php form but I don't know …

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Recommendations for java captcha libraries

I'm looking for a replacement for JCaptcha, which doesn't seem to be maintained any more, and isn't very good to …

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ReCaptcha 2.0: enable Submit button on callback if recaptcha successful

I have a very simple form as follows. I want to make it so that the Submit button is disabled, …

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How can I avoid google mail server asking me to log in via browser?

I am trying to send emails from Django using an email configured by Google Apps, my configuration at the settings.…

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How to bypass Google captcha with Selenium and Python?

I want to know how to bypass Google captcha using Selenium and Python. When I try to scrap something, Google …

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