CAPTCHA is a type of challenge-response test used in computing to determine whether or not the user is a human. It is an acronym for “Completely Automated Public Turing test to tell Computers and Humans Apart.” CAPTCHAs are used to prevent bots and automated software from interacting with a website, service, or application. They are designed to be easy for humans to solve, but difficult for computers to solve. CAPTCHAs are commonly used to protect websites and online services from spam, abuse, and automated attacks.
CAPTCHA is used to protect websites and online services from spam, abuse, and automated attacks. It does this by presenting the user with a challenge that is easy for humans to solve, but difficult for computers to solve. If the user is able to successfully solve the challenge, it is assumed that they are a human and not a bot or automated software. This helps to prevent bots and automated software from interacting with the website, service, or application in question. CAPTCHAs can be in the form of a simple math problem, a distorted image that the user must decipher, or a series of letters and numbers that the user must type out. The idea is that only a human will be able to successfully solve the challenge, while a computer will be unable to do so.
How Does CAPTCHA Work
CAPTCHA works by presenting the user with a challenge that is designed to be easy for humans to solve, but difficult for computers to solve. The user is then required to solve the challenge in order to prove that they are a human. If the user is able to successfully solve the challenge, they are allowed to proceed with their request. If they are unable to solve the challenge, their request may be denied.
There are several different types of CAPTCHAs that can be used. Some examples include:
- Text CAPTCHAs: These are the most common type of CAPTCHA. They involve presenting the user with a series of letters and numbers that are distorted or otherwise hard to read. The user is then required to type out the letters and numbers correctly in order to prove that they are a human.
- Image CAPTCHAs: These involve presenting the user with an image that contains a hidden message or challenge. The user is then required to decipher the message or solve the challenge in order to prove that they are a human.
- Audio CAPTCHAs: These are similar to text CAPTCHAs, but they are presented to the user in the form of an audio recording rather than text. The user is then required to type out what they hear in order to prove that they are a human.
Overall, the goal of CAPTCHA is to make it difficult for computers to solve the challenge, while still making it easy for humans to do so. This helps to prevent bots and automated software from interacting with a website, service, or application, which can help to protect against spam, abuse, and other types of automated attacks.