After Gmail, Facebook included HTTPS security on entire facebook website. For the encrypted way to send data specially passwords and credit card information, you can see most of the ecommerce sites having HTTPS instead of HTTP in their website URL i.e. address on the address bar on browser. Their you can click on the green box just beside the address to see the SSL certificate which shows that you can safely type your password and other information. As of now, Facebook is having HTTPS page for the pages where you enter password on Facebook but now onwards, you can choose to browse the entire site in HTTPS.
To enable secured browsing i.e. HTTPS browsing for entire Facebook, you will have to enable that settings from the “Account Settings” page on Facebook. Go to the “Account Settings” and check the box saying “Browse Facebook on a secured connection (https) whenever possible”.
Now access Facebook as a secured site without any worry of revealing your data.