A method for establishing and maintaining a Single Sign-on between a reverse proxy and a back-end server can include instigating an authentication process through a browser for a user to obtain access to the back-end server, intercepting a login page from the back-end server at the reverse proxy and adding a routine thereto, thereby loading an asynchronous engine on the browser executing a login process with an authentication profiling service, in order to retrieve the login information for the back-end server, and completing the authentication process with the back-end to allow the user access the back-end server through the asynchronous engine.