As Hong Kong convulses amid weeks of protests, demonstrators and the police have turned identity into a weapon. The authorities are tracking protest leaders online and seeking their phones. Many protesters now cover their faces, and they fear that the police are using cameras and possibly other tools to single out targets for arrest.

And when the police stopped wearing identification badges as the violence escalated, some protesters began to expose officers’ identities online. One fast-growing channel on the social messaging app Telegram seeks and publishes personal information about officers and their families. The channel, “Dadfindboy,” has more than 50,000 subscribers and advocates violence in crude and cartoonish ways. Rival pro-government channels seek to unmask protesters in a similar fashion.

read more at https://www.nytimes.com/2019/07/26/technology/hong-kong-protests-facial-recognition-surveillance.html