A reusable authentication component may be integrated into a web page to communicate with an authentication server and authenticate a user to the web page. The reusable authentication component may implement a complex authentication process, including multiple user interfaces to receive multiple assurances of user identity and user confirmation of previously stored mutual authentication data. The authentication process may be performed by the authentication component without refreshing or redirecting the parent web page until completion of a successful user authentication, after which the parent web page may receive authentication data and refresh to provide user specific and/or secure user data on the web page.