Modify the following example or examples setup so that it does not
require a user password to be supplied to the program at any time.
http://java.sun.com/j2se/1.4.2/docs/guide/security/jgss/tutorials/ClientServer.html

This will require that the client and server programs use JAAS (with
Kerberos) single sign on authentication to get the current users
principle under which the client or server program is executing under.
Once this principle is acquired, use this to establish the secure
communications through the GSS API.

No password can be stored or entered in to the application on client or server.
The server must run under Windows 2000 with Active Directory, the
client must be on a separate client machine on the same domain.
Describe fully any setup processes you must do to make this work that
is not included in the sample, like changing user account details
within Active Directory or Kerberos setup modification.
Supply any source code which is changed from the original example.