It is common to create a subdomain named secure.domain.com, and then purchase (or self-sign) a SSL certificate to go with it. The intention is that visitors will see the word “secure” and feel better knowing that a secure communication channel is being used. Not everyone knows what the acronym SSL means, after all.
Simply having an appropriate host name does nothing to enforce the concept, though. The subdomain intended for SSL connections should not be accessed any other way, and likewise all other subdomains should disallow SSL connections.
A few months ago, I decided to add Bluetooth to my computer so I could use my mobile phone’s Bluetooth headset with games that support in-game chat and other VoIP applications. I purchased a USB Bluetooth adapter, installed the provided software, and was very pleased with it overall. However, I was surprised to find that the installer dropped a “My Bluetooth Places” icon on the desktop that could not be removed.