When SSL communication is not available

Is this correct? http://www.ipa.go.jp/security/awareness/administrator/secure-web/chap4/4_openssh.html

They need a private key, public key, and certificate.
http://thinkit.co.jp/cert/article/0706/3/7/2.htm

Fairly helpful and simple explanatory site.
http://www.maruko2.com/mw/Apache/SSL%E8%87%AA%E5%B7%B1%E8%A8%BC%E6%98%8E%E6%9B%B8%E3%81%AE%E4%BD%9C%E6%88%90%E3%81%A8mod_ssl%E3%81%AE%E8%A8%AD%E5%AE%9A