# CAPTCHA: what it is and how it works · Zorraquino
> A CAPTCHA is a mechanism that attempts to distinguish human interaction from automated activity.
URL: https://www.zorraquino.com/en/dictionary/internet/captcha.html

# CAPTCHA

A CAPTCHA is a mechanism that attempts to distinguish human interaction from automated activity. Some systems present tasks; others analyse signals and return a risk assessment

What it means, how it is used and where it comes up, with its related concepts.

[The whole glossary](https://www.zorraquino.com/en/dictionary)

## What it is and how it works

A score does not establish identity or eliminate fraud on its own. The design should prevent a security check from blocking people with disabilities or stopping them from resuming their task. Form protection usually combines abuse controls, validation and usage limits rather than relying on a single visual test.

Also known as

reCAPTCHA

Topics

[Technology and data](https://www.zorraquino.com/en/dictionary/category/tecnologia-y-datos)

## Related concepts

- [Spam](https://www.zorraquino.com/en/dictionary/internet/spam.html)
- [Conversion form](https://www.zorraquino.com/en/dictionary/internet/conversion-form.html)
- [Botnet](https://www.zorraquino.com/en/dictionary/internet/botnet.html)