yp & shadowed passwds

Salut! I want to have shadowed passwords on my yp-net because I do not want that every user can see the encrypted passwords. I have only one master ypserver, no slaves but about 20 clients. That's why it would be great if I have to change only some config options on the master. Is there any cheap-dirty-little trick? I am using ypserv version 1.3.9 and ypbind version 1.6 from suse6.3. br, Christoph --- Anything that is good and useful is made of chocolate.