I am currently working in asp.net, I m all new to web programming. I have to make a website for our clients, we will give them a user id and password of thier equipment and the details (given by the clients) will be entered in the database.
My questions is that, when we create an account in , say yahoo etc, then they show an image with moving or tilted characters for verification. What is the purpose of that images?? and how do they verify the account??