SSL (Secure Sockets Layer)

SSL is an accepted standard protocol for
transferring information securely across
the Internet. It encrypts data passed
between the server and the browser,
ensuring that unauthorized parties cannot
interpret sensitive, confidential, or
personal information such as phone
numbers and addresses. If you have a
Web Hosting Standard or Web Hosting
Professional plan, you can use Yahoo!'s
SSL secure server to protect data passing
through your web site, such as responses
collected through email forms.