Hello, 
I am dealing with a problem I would like to discuss, I need to design
a server side application that a client can download files from,
The file itself is 35megs of XML data.
The options are: webservices
Secured FTP 
HTTPS
the credentials sent to the server must be encrypted. and
authentication is done by a third party product.
Application must be written in C# .net on IIS web server.

I tend to go with HTTPS since believe this will be the simples layout
though I am not sure how to handle a case where the download stops and
need to continue after a while from the same point.

suggestions? does anyone see any benefit by using Secured FTP or Web services? 
(over HTTPS and Secured FTP I believe I can zip the xml file to 1/10th
of its origianll size)