What is CAPTCHA?

CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart. It is a security feature used in cybersecurity to distinguish between humans and automated bots or computer programs.
What does CAPTCHA mean?
CAPTCHAs typically present challenges to users that are easy for humans to solve but difficult or impossible for machines to solve automatically. For example, a common CAPTCHA challenge is to identify distorted letters or numbers, solve a puzzle, or click on all the images containing a specific object.
What is the purpose of CAPTCHA?
The purpose of CAPTCHA is to prevent automated bots and malicious programs from performing certain actions, such as creating multiple user accounts, spamming comments sections or forums, or launching brute force attacks[a] against login pages. By using CAPTCHA, websites and applications can verify that a human is interacting with the system, rather than an automated bot or script.
Are there security risks involved with CAPTCHA?

While CAPTCHA itself is not necessarily a security risk, there are some potential concerns associated with its use:
* Privacy: Some CAPTCHA providers may collect data on users, such as their IP addresses and browsing behavior, which could be used for tracking or other purposes.
* Accessibility: Some users with disabilities may find it difficult or impossible to complete certain types of CAPTCHA challenges, potentially excluding them from accessing certain services or websites.
* Usability: Some CAPTCHA challenges can be difficult or frustrating for users, which could lead to them abandoning the task or website altogether.
* Exploits: While CAPTCHA is designed to prevent automated attacks, some attackers may be able to bypass or exploit CAPTCHA mechanisms using advanced automated tools or human-powered services.


CAPTCHA can be an effective security measure when used properly, but it is important to be aware of the potential risks and limitations associated with its use.