Author: Dan Langille
Date: 02-06-03 11:36
From man rsync:
This option allows you to provide a password in a file for
accessing a remote rsync server. Note that this option is only
useful when accessing a rsync server using the built in trans-
port, not when using a remote shell as the transport. The file
must not be world readable. It should contain just the password
as a single line.
1 - it's plain text, a single line
2 - you should be using it when using remote shell as the tranport
I think that means it won't work with ssh. Your choice is then an ssh key with a blank/empty passphrase. Search for "authorised keys" in the article.
Mind you, I see myself using the password file and ssh as the medium, so I don't know what happened there.