You want to ensure that communication between the server and a remote client is encrypted to ensure privacy.
Install a server certificate, and configure the virtual directory to require SSL.
Secure Sockets Layer (SSL) technology is used to encrypt communication between a client and a Web server. You can use SSL automatically with a Web service or Web site—all you need to do is configure IIS accordingly.
Before a Web server can support SSL connections, it must have an X.509 digital certificate. This certificate indicates that the server identity is registered with a valid certificate authority (CA). You can generate your own certificate for testing (using Certificate Server from Windows 2000 ...