A CAPTCHA (/ ˈkæp.tʃə / KAP-chə) is a type of challenge–response Turing test used in computing to determine whether the user is human in order to deter bot attacks and spam. [1] The term was …

What is a CAPTCHA? A CAPTCHA test is designed to determine if an online user is really a human and not a bot. CAPTCHA is an acronym that stands for "Completely Automated Public Turing test to tell …

reCAPTCHA is a free service that protects your site from spam and abuse. It uses advanced risk analysis techniques to tell humans and bots apart. reCAPTCHA v3 helps you detect abusive traffic...

CAPTCHA: Telling Humans and Computers Apart Automatically A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer …

Feb 11, 2025 · In simpler terms, it's a test designed to determine whether the user is a human or a bot. Websites use CAPTCHA to prevent spam, protect against automated attacks, and ensure that only …

CAPTCHA stands for "completely automated public Turing test* to tell computers and humans apart." It refers to various authentication methods that validate users as humans, not bots, by presenting a …

Sep 10, 2025 · CAPTCHA is a type of challenge-response test used on websites to determine whether a user is a human or a bot. Bots, or automated programs, can perform repetitive tasks at a much faster …

Jun 2, 2025 · CAPTCHAs were designed to shield and protect websites from malicious bots. What is a CAPTCHA? The acronym CAPTCHA stands for “Completely Automated Public Turing Test to Tell …

hCaptcha Enterprise Understand intent. Stop abuse. Protect your services from automated and human threats, while preserving user privacy.

CAPTCHA (Completely Automated Public Turing Test To Tell Computers and Humans Apart) is a system designed to differentiate between human visitors to a website and robotic agents. …