Bangladesh, June 14 -- Hong Kong, June 14 (AP/UNB) (AP) - Young Hong Kong residents protesting a proposed extradition law that would allow suspects to be sent to China for trial are seeking to safeguard their identities from potential retaliation by authorities employing mass data collection and sophisticated facial recognition technology.

Agnes, a second-year college student who declined to give her surname, said she donned a face mask as soon as she left a subway train in the downtown Admiralty district to join Wednesday's overnight protest by pro-democracy demonstrators.

"Everybody coming out is wearing masks because you don't know what people will do with the information," Agnes said as friends nodded in agreement. None of them woul...