Facebook team is no doubt working day-night on the privacy and security issues. This time they have come up with a unique CAPTCHA. Actually traditional CAPTCHAs are the images that we see most of the time while filling a form on web. From those images, we need to identify the letters and fill up in a box to verify that we are human not a bot. Facebook has come up with a unique CAPTCHA where your facebook friends will become a CAPTCHA image and you will have to select the correct name from the 4 – 6 names listed just below the picture of your friend.

Friends as CAPTCHA is no doubt one level more secured than traditional CAPTCHAs as hackers and bots may find the letters in image but they can’t select the correct name of your friends.These are the security initiatives taken by Facebook for its 600 million users and Facebook team is testing it right now. Now time will tell whether this Social Authentication technique will succeed or not.