SAML IdP Implementation

Question

I am new to SAML IdP Single Sign-on Implementation and looking for a cloud service or a framework that helps to build an IdP (.Net MVC Framework) for already logged in users but just to authenticate with a service provider with a unqiue identifier. After a user has logged in, I want to build an IdP service that posts an assertion to the Service provider with a unique key in the assertion subject and display the SP's metadata info in the website.

Answer 1

Have a look at this.

There's a list of public SAML IDP that should be enough to get you going.