Suggest a best algorithm to encrypt XML file in C#.NET ?

Question

I have to encrypt XML file and send in network to place in a private server. My other application will decrypt and import to SQL the file by giving the actual Public key.

Could you please suggest me best way for this.

File: XML Type
Possible size: Up to 250 MB
Technology: C#.NET 2008

Answer 1

Upload the file using SSL/TLS (e.g., with HTTPS or a Socket+SslStream) and let the server require the client to present an X.509 client certificate.

Answer 2

I would suggest using the RijndaelManaged class. This is a good example of its use.

Here is more the AES Algorithm.

Answer 3

Use XML encryption. It is supported directly in .NET through the EncryptedXml class.

There is an example on MSDN here: How to: Encrypt XML Elements with Asymmetric Keys.

Note that you should use the public key to encrypt and the private key to decrypt (and not the other way around as you wrote in the question).