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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35
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6answers
2k views

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. ...
9
votes
9answers
433 views

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 ...
6
votes
4answers
605 views

Does Captcha Really Affect UX?

From my own personal experience, I don't like CAPTCHA when filling a form, especially encountering unrecognizable picture or calculation-required one. When I submit some advises to the website, it's ...
81
votes
13answers
7k views

CAPTCHA on mobile: what are the alternatives?

From a UX perspective, CAPTCHA's are bad, bad, bad. But let's say we have this as a requirement. And it's for a hybrid app (compiled app, but built upon an HTML5 platform). I'm trying to find out: ...
11
votes
2answers
2k views

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 ...
7
votes
3answers
438 views

Has Captcha become common knowledge?

I am doing a business site for a web company, and was wondering if Captcha has become so well-known, that it no longer needs an explanation ? Right now there is only a input box, the captcha image ...
6
votes
6answers
808 views

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?