This section describes how Firefox 35 shows a lock icon when you visit an 'https' Web site to provide you more security related information.
As I mentioned earlier in the book, Web browsers play very important roles in using HTTPS
(Hypertext Transfer Protocol Secure) to secure Web communications.
Now let's see how Firefox 35, as the leading Web browser, supports HTTPS.
1. Run Firefox 35 and go to Yahoo home page, www.yahoo.com.
2. Click "Mail" in the Yahoo Sites menu.
3. After Firefox 35 finishing displaying the login page, look at the
bottom right corner of the browser window. You will
see lock icon displayed next to the address:
What happened here was:
When the link "Mail" was clicked, Firefox was redirected to use this URL: https://login.yahoo.com/...
Since this is HTTPS based URL, Firefox requested for the server, login.yahoo.com, to provide the server certificate.
Firefox validated the server certificate and found no issue.
Firefox created a one-time encryption key, encrypted with server's public key and delivered to the server.
Server returned the login page document encrypted with the encryption key.
The lock icon at the right side of the address indicates that this page is secured with HTTPS.
If you click the lock icon, Firefox will provide you more security related information for this page.
See next sections for more tutorials.