CAPTCHA and reCAPTCHA
In todays era each and everyone uses Smart-Phone or Laptop PC. Once in a lifetime each and everyone goes through a process called as CAPTCHA and reCAPTCHA. CAPTCHA and reCAPTCHA is a system that is designed to make sure that computer user is human or a robot. It is a free security service provided by google that protects your website from spam and abuse.It helps to detect abusive traffic sources on websites.It provides security to your website from bots. CAPTCHA and reCAPTCHA is used to check whether the use is human or not. CAPTCHA is a short form of:- C ompletely A utomated P ublic T uring test to tell C omputers and H umans A part CAPTCHA was introduced to stop spaming and to stop computers or bots to make thousands of id's in just one second. In 2003 CAPTCHA was designed by Luis von Ahn, Manuel Blum, Nicholas J. Hopper and John Langford. In CAPTCHA it shows variety of letter that can be seen by human eyes, Those letters are not readable by computer. Humans ca