CAPTCHA - Wikipedia
网页A captcha (/ ˈ k æ p. tʃ ə / KAP-chə, originally the acronym CAPTCHA) [1] [2] [3] [4] is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam. [5] The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. [6]
什么是 CAPTCHA? | CAPTCHA 用例 | IBM
网页什么是 CAPTCHA？. CAPTCHA 是“Completely Automated Public Turing Test* to Tell Humans Apart（全自动区分计算机和人类的图灵测试）”的首字母缩写。. CAPTCHA 是指各种认证方法，这些方法利用一个对于人类来说很简单但对机器来说很难的挑战来测试用户，以验证用户是否为人类 ...
The Official CAPTCHA Site
网页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 programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:
What is reCAPTCHA? - Google Developers
网页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. Get started.
How CAPTCHAs work | What does CAPTCHA mean? - Cloudflare
网页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 Computers and Humans Apart." Users often encounter CAPTCHA and reCAPTCHA tests on the Internet.
What is CAPTCHA? - IBM
网页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 challenge that is simple for humans but difficult for machines.
CAPTCHA 的运作方式 | CAPTCHA 有何含义？ - Cloudflare
网页什么是 CAPTCHA，它的作用是什么？了解 CAPTCHA 测试的工作原理、Google reCAPTCHA 的工作原理以及这些测试如何帮助阻止不良机器人。
Captcha Solver: Captcha solving service includes reCAPTCHA …
网页Fastest online captcha solving service starting at just $1 for 1,000 captchas. Service supports APIs including PHP, Python, C++, JAVA, C#, and JavaScript, ensuring seamless integration with your applications. Efficient, reliable, and cost-effective, captcha solver is created to fulfill any requirements.
reCAPTCHA - Wikipedia
网页reCAPTCHA Inc. [1] is a CAPTCHA system owned by Google. It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images.
What is CAPTCHA? - Google Workspace Admin Help
网页CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a type of security measure known as challenge-response authentication. CAPTCHA helps protect you from...