Invisible wrote:
...
> Now all the sysadmin needs to do is install a keylogger... 
> oh, wait... ;-)
> 
> Anything you can do, the sysadmin can undo. He controls the machine 
> you're using. You can't win.
...

I think you can.

Just boot an OS from a media that he does not control.
E.g. Knoppix from a CD or a memory stick.

Thereafter there are many ways to store information encrypted
on network drives.

And the keys does not have to be visible to the network server.
(Small memory sticks or smart cards are good places to store
the keys.)

-- 
Tor Olav
http://subcube.com

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