What is a CAPTCHA?

[Daryl_Dixon]

I often come across something called CAPTCHA when browsing online, but I don’t fully understand it. Can you explain what a CAPTCHA is and suggest why websites use it for security?

 

[louisegrant]

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a Web gadget that makes sure that the user is not a robot, but is a human. One example: clicking pictures, games, or writing twisted letters.

 

[Barack Obama]

A CAPTCHA is a security test used online to confirm if a user is human or a bot. It usually involves tasks like typing distorted text, solving puzzles, or clicking images, helping prevent spam, fraud, and automated abuse.

 

[Kelseyleblanc]

A CAPTCHA is a test used on websites to tell humans and computers apart. It usually asks you to identify letters, numbers, images, or click boxes to prove you’re not a bot.

 

[Jasongonzales]

A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a security measure. It presents a simple challenge, like deciphering distorted text or selecting images, that is easy for a human but difficult for an automated bot to solve. Its purpose is to prevent spam and fraud.