Disclosed are systems and methods for authenticating web users. In one embodiment, a method includes sending the destination web page to the parent frame of the web browser, where the destination web page when processed by the web browser is operable to perform operations, including determining if the web user is authenticated with the content provider and generating a child frame associated with the parent frame if the web user is not authenticated with the content provider. The destination web page is operable to perform further operations, including requesting, by the child frame, an authentication web page from an authorization provider, receiving, by the child frame, the authentication data from the authorization provider, and receiving, by the parent frame, the authentication data.