To enable SSL or Secure Browsing on Facebook, this will help evade been hack with tools like Faceniff.
1. Login from a computer that is connected to a secure Wireless Connection WAP2 or better.
2. From the profile page click on the Account Settings.
3. On the Account Settings page, go to the Security Settings Menu.
4. Enable Secure Browsing.
5. Now your URL will show with https:// meaning is browsing with ssl and with the lock with no error meaning it has a valid ssl certificate from the site.