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 ...
What is reCAPTCHA? reCAPTCHA is a free service that protects your website from spam and abuse. reCAPTCHA uses an advanced risk analysis engine and adaptive CAPTCHAs ...
A CAPTCHA (an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart") is a type of challenge-response test used in computing to ...
A CAPTCHA is a challenge-response test most often placed within web forms to determine whether the user is human. The purpose of CAPTCHA is to block form submissions ...
Called "CAPTCHA," it's essentially a test that's easy for a human to complete, but difficult or impossible for a computer to do.
The Captcha plugin adds a captcha form into web pages. This captcha can be used for login, registration, password recovery, comments forms. It protects your website ...
Get a Free CAPTCHA For Your Site. The reCAPTCHA project at Carnegie Mellon University offers a free, secure and easy to install CAPTCHA implementation.
This page describes the term CAPTCHA and lists other pages on the Web where you can find additional information.
sweetCaptcha is a fresh, friendly, action-based CAPTCHA service that’s easy for you to add to your website and less frustrating for users to solve than difficult-to ...
A free open-source PHP CAPTCHA script for generating complex CAPTCHA images and audio files. Easy to integrate and customize.