Protests have erupted in South Africa over a measure barring the disclosure of so-called “state secrets.” The African National Congress’s so-called Protection of State Information Bill grants the state the authority to determine what documents classify as secret with respect to the “national interest.” Individuals found in possession of such documents can be sentenced to up to 25 years in jail. Critics of the bill include Nobel Prize winner Desmond Tutu, who has called it “insulting to all South Africans.” Protesters dressed in black gathered in the South African city of Johannesburg Tuesday to denounce the legislation.