A CAPTCHA is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person.
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Can we do better than CAPTCHA?
There are a variety of different forms of CAPTCHA and other strategies in order to prevent spam. To briefly list a few:
Simple math or word questions.
Obfuscated text.
JavaScript-based CAPTCHAs.
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votes
9answers
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barebone registration: is password repitition and captcha really essential?
If you design a barebone registration form which only requires
email address and password as essentials can you omit the password repetition and captcha without too much technical trouble?
I ...
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votes
2answers
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Honeypot captchas and accessibility
I have been looking at ways to prevent spam bots from posting, regstering and performing actions on my site.
Initially, I thought about implementing ReCAPTCHA using its API. However, I have found ...
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votes
6answers
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Asirra or Captcha?
I've just heard about "Asirra" and tried it. But, I am a little bit confusing about using. What is your choice for usability?
Asirra or CAPTCHA, and why?
