PRISM is a code name for a program under which the United States National Security Agency (NSA) collects internet communications from various U.S. internet companies.[1][2][3] The program is also known by the SIGADUS-984XN.[4][5] PRISM collects stored internet communications based on demands made to internet companies such as Google LLC and Apple under Section 702 of the FISA Amendments Act of 2008 to turn over any data that match court-approved search terms.[6] Among other things, the NSA can use these PRISM requests to target communications that were encrypted when they traveled across the internet backbone, to focus on stored data that telecommunication filtering systems discarded earlier,[7][8] and to get data that is easier to handle.[9]
Documents indicate that PRISM is "the number one source of raw intelligence used for NSA analytic reports", and it accounts for 91% of the NSA's internet traffic acquired under FISA section 702 authority."[15][16] The leaked information came after the revelation that the FISA Court had been ordering a subsidiary of telecommunications company Verizon Communications to turn over logs tracking all of its customers' telephone calls to the NSA.[17][18]
U.S. government officials have disputed criticisms of PRISM in the Guardian and Washington Post articles and have defended the program, asserting that it cannot be used on domestic targets without a warrant. Additionally claiming the program has helped to prevent acts of terrorism, and that it receives independent oversight from the federal government's executive, judicial and legislative branches.[19][20] On June 19, 2013, U.S. President Barack Obama, during a visit to Germany, stated that the NSA's data gathering practices constitute "a circumscribed, narrow system directed at us being able to protect our people."[21]