SSL

Originally created by the people at Netscape, the Secure Socket Layer (SSL) has been adopted as a standard for transfering data over the internet. If you've ever been to a website where the URL starts with https:// instead of the typical http://, you are using SSL. This means there is an encrypted tunnel between you and the remote machine, so everything transferred can not be read trivially if someone is sniffing.

Only enter personal information or credit card information into a website that is using https:// in the URL, this is covered in the User Registration process.

To get an idea of what happens behind the scenes when you surf the web using your browser to an SSL website:

$ openssl s_client -connect http://www.example.com:443