ReCaptcha in ASP.NET MVC3

As a web developer we know what is captcha is. It’s way to confirm users as they are human.Following is captcha definition per WikiPedia. A CAPTCHA (/ˈkæptʃə/) is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are assumed to be unable to solve the CAPTCHA, any user en...