PRISM is a clandestine[1] surveillance program under which the United States National Security Agency (NSA) collects internet communications from at least nine major US internet companies.[2][3][4] Since 2001 the United States government has increased its scope for such surveillance, and so this program was launched in 2007.
PRISM is a government code name for a data-collection effort known officially by the SIGAD US-984XN.[5][6] The PRISM program collects stored internet communications based on demands made to internet companies such as Google Inc. under Section 702 of the FISA Amendments Act of 2008 to turn over any data that match court-approved search terms.[7] 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,[8][9] and to get data that is easier to handle, among other things.[10]
PRISM began in 2007 in the wake of the passage of the Protect America Act under the Bush Administration.[11][12] The program is operated under the supervision of the U.S. Foreign Intelligence Surveillance Court (FISA Court, or FISC) pursuant to the Foreign Intelligence Surveillance Act (FISA).[13] Its existence was leaked six years later by NSA contractor Edward Snowden, who warned that the extent of mass data collection was far greater than the public knew and included what he characterized as "dangerous" and "criminal" activities.[14] The disclosures were published by The Guardian and The Washington Post on June 6, 2013. Subsequent documents have demonstrated a financial arrangement between NSA's Special Source Operations division (SSO) and PRISM partners in the millions of dollars.[15]
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."[16][17] The leaked information came to light one day after the revelation that the FISA Court had been ordering a subsidiary of telecommunications company Verizon Communications to turn over to the NSA logs tracking all of its customers' telephone calls.[18][19]
U.S. government officials have disputed some aspects of the Guardian and Washington Post stories and have defended the program by asserting it cannot be used on domestic targets without a warrant, that it has helped to prevent acts of terrorism, and that it receives independent oversight from the federal government's executive, judicial and legislative branches.[20][21] 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."[22]
Extent of the program
Internal NSA presentation slides included in the various media disclosures show that the NSA could unilaterally access data and perform "extensive, in-depth surveillance on live communications and stored information" with examples including email, video and voice chat, videos, photos, voice-over-IP chats (such as Skype), file transfers, and social networking details.[3] Snowden summarized that "in general, the reality is this: if an NSA, FBI, CIA, DIA, etc. analyst has access to query raw SIGINT [signals intelligence] databases, they can enter and get results for anything they want."[14]
According to The Washington Post, the intelligence analysts search PRISM data using terms intended to identify suspicious communications of targets whom the analysts suspect with at least 51 percent confidence to not be U.S. citizens, but in the process, communication data of some U.S. citizens are also collected unintentionally.[2] Training materials for analysts tell them that while they should periodically report such accidental collection of non-foreign U.S. data, "it's nothing to worry about."[2][41]
According to The Guardian, NSA had access to chats and emails on Hotmail.com, Skype, because Microsoft had "developed a surveillance capability to deal" with the interception of chats, and "for Prism collection against Microsoft email services will be unaffected because Prism collects this data prior to encryption."[42][43][44]
Also according to The Guardian's Glenn Greenwald even low-level NSA analysts are allowed to search and listen to the communications of Americans and other people without court approval and supervision. Greenwald said low level Analysts can, via systems like PRISM, "listen to whatever emails they want, whatever telephone calls, browsing histories, Microsoft Word documents.[31] And it's all done with no need to go to a court, with no need to even get supervisor approval on the part of the analyst."[45]
He added that the NSA databank, with its years of collected communications, allows analysts to search that database and listen "to the calls or read the emails of everything that the NSA has stored, or look at the browsing histories or Google search terms that you've entered, and it also alerts them to any further activity that people connected to that email address or that IP address do in the future."[45] Greenwald was referring in the context of the foregoing quotes to the NSA program X-Keyscore.[46]
