xdmcp

Remote X Display with Fedora 10 running KDM and XFCE

I am developing a JSF web application on a Windows box using Emacs as my editor but I far prefer to use Emacs in a Linux environment. In the (somewhat distant) past it was a no-brainer to use a remote X display to accomplish this very useful programming aid. Cygwin helps out somewhat but true remote X is the preferred solution. Howeve...

Are there any secure alternatives to XDMCP?

The title says it all: Are there any secure alternatives to XDMCP (A Linux remote desktop protocol)? I'd like to set up some thin clients -- UI heads (old computer + mouse + keyboard) connected to VMs on a fast server. ssh -Y doesn't quite cut it, since this would be for non-savvy computer users. I'd like it integrated with kdm/gdm if p...