Twenty-one-year-old Egor Tsvetkov has carried out an experiment to show how easy it is to identify complete strangers.\r<br>\r<br>The Russian photography student took photos of people in public places and then tracked them down on the Russian social media site VKontakte using a facial recognition app.\r<br> \r<br>The experiment You Face Is Big Data was published online and has been viewed by more than 70,000 times.\r<br>\r<br>Video journalist: Anne-Marie Tomchak\r<br>-------------\r<br>\r<br>SUBSCRIBE to BBC Trending: \r<br>\r<br>Like what you see? Follow us here:\r<br>BBC Trending blog: \r<br>Twitter: \r<br>Facebook:
