Use WSE to Encrypt SOAP packets (4)

Encrypt messages sent externally
Here I will briefly describe how to create a Web service that can return an encrypted XML document. In the first step, use the using indicator to add the necessary namespace, as shown below:
Using System. Web. Services;
Using Microsoft. Web. Services;
Using Microsoft. Web. Services. Security;
Using System. Security. Cryptography;
Using System. Security. Cryptography. Xml;
Using System. Xml;
The GetXmlDocument method uses the. NET framework to implement the ternary DES algorithm. It uses a 128-bit key and a 64-bit initialization vector (IV) to generate a symmetric key. This key will also have a name and be added to the SoapContext element of the response message. Then it will be used by SecurityOutputFilter to encrypt simple XML documents. This method will finally be returned to the client.