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05.07.2008 at 08:08PM PDT, ID: 23384952
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Best way to implement secure file upload/download from workstation to server

Tags: Microsoft, Visual Studio 2005, Windows Server 2003, IIS 6, .NET 2.0, SSL Security Certificate installed on the server, C#, IE 6/7
I have a C# workstation app that uses xml web services.  Currently, I am using Client FTP software (from Clever Components) to download files from the server to the workstation (client), and also, upload from the client to the server.  I need to secure the file transfer with encrption to be HIPAA compliant, however, Microsoft IIS does not support Secure FTP.

I was thinking of migrating from FTP to Secure Web Services using the WebRequest/WebResponse classes.  If this the best approach?  What do you suggest?
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Question Stats
Zone: Software
Question Asked By: prochko
Solution Provided By: DaveHowe
Participating Experts: 2
Solution Grade: A
Views: 51
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05.07.2008 at 08:44PM PDT, ID: 21522176

Rank: Master

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05.07.2008 at 08:51PM PDT, ID: 21522201

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05.08.2008 at 12:27AM PDT, ID: 21522910

Rank: Guru

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05.08.2008 at 10:36AM PDT, ID: 21526783

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05.08.2008 at 11:15AM PDT, ID: 21527076

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05.08.2008 at 05:38PM PDT, ID: 21529642

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05.08.2008 at 09:41PM PDT, ID: 21530430

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05.07.2008 at 08:44PM PDT, ID: 21522176
 
05.07.2008 at 08:51PM PDT, ID: 21522201
I have a Windows program that uses FTP classes from Clever Components in C#.  I am looking to implement secure file transfer in code.  That is why I'm considering migrating from ftp to secure web services.  I am looking for a solution that will integrate into my existing workstation app, not a standalone file transfer program.   Thanks
 
05.08.2008 at 12:27AM PDT, ID: 21522910

Rank: Guru

Just transfer the files over https then. this has the side benefit that, properly set up, you can substitute any generic browser (or a java based client) should the clientside binary be unavailable or fail.

sftp is incredibly secure, but almost all implementations are in fact full copies of ssh - so may give more access to the local machine than you would prefer - and sftp transfer is notoriously slow. if you want that though, there are c# components that support ssh or sftp. I note the following:

http://www.eldos.com/sbb/sftp-net.php

would also allow you to create serverside c# apps to handle that side of the link as well, should you choose to.

finally another alternative is to transfer the files any way you want, but encrypt them first - that way, even if they are intercepted, the data is protected.
Accepted Solution
 
05.08.2008 at 10:36AM PDT, ID: 21526783
DaveHowe:  Thank you

What about my idea of using Secure Web Services using the WebRequest/WebResponse classes?
 
05.08.2008 at 11:15AM PDT, ID: 21527076

Rank: Guru

its an option, but as I understand it, WReq/Wresp is designed for interchange of soap transactions not file upload - you could probably encapsulate the file, and unpack/write it on receipt, but it seems to me easier to use protocols designed for file upload (the https method and/or sftp) rather than reinvent the wheel.
 
05.08.2008 at 05:38PM PDT, ID: 21529642
 
05.08.2008 at 09:41PM PDT, ID: 21530430
Thanks guys!
 
 
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