Hackers have exposed the identities of more than 40,000 employees of the Department of Homeland Security. The group responsible is a set of hacktivists calling themselves Distributed Denial of Secrets. The material put online covers ICE agents, DHS operatives and contractors whose names were made public. The group defended the move as fair play, arguing that the government has shown a lack of transparency. The release puts a large body of federal personnel into open view.