To stop data travelling across the wire in clear you can tunnel the
ADSM traffic protocol with SSH using port forwarding.  TCP/IP only,
you need machines that you can get SSH clients for (UNIX, Windows).

I just tried it now. dsmc and dsmadmc worked just fine between a pair
of SPARCstations.

Of course, then you have to trust who has access to files on the
server.  Anyone with rights to change a node password on the ADSM
server can then retrieve their data ;) ... blah blah ... unlocked
offices ...

Russell
(random thoughts'r'us)