Authorization and Authentication using WCF Security - Silverlight

  In my previous articles Silverlight 4.0 - Calling Secured WCF 4.0 Service hosted with SSL and Self-Signed Certificate, we saw how to consume WCF SSL enabled service in Silverlight 4.0 client and in the article Silverlight 4.0 - Secure Communication to WCF service using Custom User Name and Password Validator, we saw how to authenticate a user using by using custom user name and password. As an