Forms Authentication
Forms-based authentication is a popular mode of authenticating users to access an entire application or specific resources within an application. Using it allows you to put the login form directly in the application so that the end user simply enters his username and password into an HTML form contained within the browser itself. One negative point of forms-based authentication is that the usernames and passwords are sent as clear text unless you are using SSL. Implementing forms-based authentication in your web application is easy and relatively straightforward.