This is a discussion on How CAPTCHAs Usually Work? within the Web Design forums, part of the Web Designing & Development category; Could anyone explain how captchas work? Is there any particular format of captcha or we can use any type of ...
How CAPTCHAs Usually Work?
Could anyone explain how captchas work?
Is there any particular format of captcha or we can use any type of captcha to our website?
Re: How CAPTCHAs Usually Work?
A CAPTCHA image shows a random string which the user has to type to submit a form. This is a simple problem for (seeing) humans, but a very hard problem for computers which have to use character recognition, especially, because the displayed string is alienated in a way, which makes it very hard for a computer to decode.
To use this technology, your web pages have to be generated dynamically in any programming language.
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