RIO DE JANEIRO, BRAZIL - A few minutes is all it takes for a facial recognition algorithm to identify a person by correlating their face with millions of faces in a database. If the person is wanted by the law, they can be approached by the police if they look too much like a suspect.
Twenty states in the five regions of Brazil use or are implementing facial recognition technology in public security forces. Another three are studying its implementation, and only four states do not use it, have not had contact with the system or plan to use it. The . . .