With the International Data Privacy Day just a day ahead, Facebook has today announced two new features as part of its effort to make the social networking giant more secure.

It now allows the users to have full Https sessions which obviously is a great step towards secure browsing. Previously, Https was only being used for logging in but now the entire session can be held in Https making the user dara more secure and less vulnerable to snooping software’s such as Firesheep.

There is also this new security feature that was being tested by facebook last year and is not live that seems to be a nice replacement for CAPTCHAS. It’s being called “Social authentication” and it comes into action when facebook detects suspicious activity on your account. The new feature makes you tag your friends’s photos correctly so unless you are the actual account holder, you won’t be able to tag the photos correctly. Clever move, facebook.

Https support is optional for now and you can turn it on by heading over to the “account settings” page on facebook. Social authentication feature is now live.