8.17. How do I make or get a certificate for SSL?
This is handled separately and independantly from Interchange, and there are lots of documentation on buying and installing certificates for your platform and http server, as well as generating certificate signing requests (CSR). Companies such as GeoTrust and Thawte sell certificates, and often have some documentation on what the process entails. The Apache, mod_ssl, and OpenSSL user groups may be of assistance as well.
While it is technically feasible to generate your own self-signed certificate, modern browsers will display a warning if the certificate is not signed by a signing authority known to that browser.