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How do I creating and read encrypted XML files with VB.Net?

Posted on 2008-10-28
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Last Modified: 2012-05-05
Hey all,

I am having a bit of trouble figuring out how to write out and read back some encrytped XML files using VB.Net 2005 and could use some help.  

What I am trying to do is two fold:
-One:  Save the contents of a loaded XMLDocument object as an encrypted XML file (the type of encryption does not matter; however, speed of decryption will be important down the road.
-Two:  Read the contents of the encrypted file back into an XMLDocument object which I can then run some Xpath statements against.

The key would be known by both the program doing the encryption as well as the program doing the decryption.

Seems straight-forward.  I have found a lot of great XML/encryption/decryption examples but nothing that quite fits.  Your help is appreciated.
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Question by:dgnatek
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techExtreme earned 500 total points
ID: 22825266
Hello,
Have a look at this tutorial, it explains well about encrypting xml docs then decrypting them back and reading the content back.

http://blogs.msdn.com/shawnfa/archive/2003/11/14/57032.aspx
Hope it helped!

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Author Comment

by:dgnatek
ID: 22825946
Thats a fine start.  However the example references an EncryptedXML object, supposedly part of System.Security.Cryptography.Xml.  However, I do not not have an XML (or XML.EncryptedXml) under System.Security.Cryptography.  I am on v2.0 of the framework.  Any suggestions?

Imports System
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml             <=== Does not exist.
Imports System.Xml

Open in new window

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Author Comment

by:dgnatek
ID: 22837107
As a followup to the above comment, it is necessary to add a reference to Sytem.Security.dll in your project properties before references to System.Security.Cryptography.Xml are valid.  Just adding an Imports statement was/is not enough.
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Author Closing Comment

by:dgnatek
ID: 31510903
I was really hoping for a VB.Net based solution (example).  However, I was able to decode the C# stuff.  Thanks.
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