---
title: Jericho's Cybersecurity Glossary | CAPTCHA
description: CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a challenge-response test used to verify whether the user is a human or a bot by presenting tasks that are easy for humans but difficult for automated systems.
---

[Jericho Security | Glossary](http://www.jerichosecurity.com/glossary)

# [Jericho's Cybersecurity Glossary | CAPTCHA](http://www.jerichosecurity.com/glossary/captcha)

 Written by [Jericho Security Team](http://www.jerichosecurity.com/glossary/author/jericho-security-team) | September 27, 2024

#### *Definition:*

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a challenge-response test used to verify whether the user is a human or a bot by presenting tasks that are easy for humans but difficult for automated systems.

#### *Use Cases:*

- Used in online forms to prevent automated bots from submitting data or spamming websites.
- Employed in login pages to prevent brute force attacks and other automated threats.

#### *Related Terms:*

- [Botnet](https://www.jerichosecurity.com/glossary/botnet)
- Automated Attacks
- Security Challenge
- Turing Test

#### *Questions and Answers:*

- **How does CAPTCHA prevent bots from accessing systems?**CAPTCHA presents tasks that are difficult for bots to solve, such as identifying objects in images or solving distorted text, thus preventing automated systems from proceeding.
- **What are the different types of CAPTCHA?**Common types include image recognition, text-based challenges, and more advanced versions like reCAPTCHA, which analyze user behavior to differentiate humans from bots.
- **Why is CAPTCHA important for web security?**CAPTCHA helps prevent automated attacks, including bot submissions and brute force login attempts, improving the overall security of online services.

[View full post](http://www.jerichosecurity.com/glossary/captcha)

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