Authentication
Web-based deployments provide web-based login functionality and use the authentication mechanism provided by your application server. They support authentication customization by allowing you to, for example, configure your application server to use the security realm and authentication service of your choice.
Local deployments include data server login functionality, and support authentication by allowing you to supply any JAAS-supported authentication module as a plug-in to the data server and to the Dashboard Viewer.
Note:
In display server deployments, the user name is passed as an encrypted parameter in the URL. The length of an encrypted user name is greater than that of an unencrypted user name. Given the limits on the length of the URLs in browser GET requests, the effective limit on the length of a user name in a dashboard is approximately 1000 characters.