Facial recognition in cities: The end of anonymity?

Moscow subway users have started buying tickets using facial recognition technology. Authorities claim queues at ticket counters will be greatly shortened with the system dubbed "Face Pay". This move, however, is already sparking controversy since facial recognition has been used in the past for repressive purposes. In this edition, we explore these technologies that are being deployed in smart cities around the world and whether this means the end of anonymity in public places.