Abstract: A computer-implemented method may include providing authentication code for an existing web-based application. The authentication code may be programmed to modify functionality of the existing web-based application as the existing web-based application executes while leaving a binary of the existing web-based application unchanged. The method may also include establishing strong authentication for the existing web-based application by 1) identifying, via the authentication code, a request to bind an authentication credential to a profile of a user, the request being received via a browser through which the existing web-based application is accessed, 2) directing, via the authentication code and in response to the request, the browser to an external authentication site that is not part of the existing web-based application, and 3) at the external authentication site, enabling the user to bind the authentication credential to the profile.