Forms Authentication:
A system by which unauthenticated requests are redirected so an HTML form using HTTP client-side redirection. The user provides credentials and submits the form. If the application authenticates the request, the system issues a cookier that contains the credentials or a key for reacquiring the . identity Subsequent requests are issuesd with the cookie in the request headers; they are authenticated and authorized by an ASP.NET event handler using whatever validation method the application developer specities.
Passport Authentication:
Centralized Authentication Service Provided by Microsoft That Offers A Single Logon and Core Profile Services for Member Sites.
Windows Authentication:
ASP.NET uses Windows authentication in conjunction withh Microsoft internet information services (IIS) in one of three ways:. Basic, digest, or integrated Windows Authentication When IIS authentication is complete, ASP.NET uses the authenticated identity to authorize access.
