73. PRISM

♤ PRISM is a clandestine mass electronic surveillance data mining program known to have been operated by the United States National Security Agency (NSA).

♤ The Prism program collects stored Internet communications based on demands made to Internet companies such as Google and Facebook.

♤ It allows officials to collect material including search history, the content of emails, file transfers and live chats.

♤ PRISM was publicly revealed when classified documents about the program were leaked to journalists of the Washington Post and The Guardian by Edward Snowden – at the time an NSA contractor – during a visit to Hong Kong.