What is CAPTCHA ???

Have you ever seen the distorted letters while signing up for many e-mail accounts, after completing the all steps of signing up process, a last step of sign up process is there is a section of distorted letters which you have to type it again in the blank field given. This what called CAPTCHA.


CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart.


CAPTCHA is used to verify that the user which is filling the information or using the service is human or a computer. The human can easily pass this verification test but it is very hard for computer to solve this puzzle.


This verification process is used so that the spammers can't make hundreds of fake accounts with the help of a computers or bots