(NSA) : A branch of the U.S. Department of Defense, responsible for ensuring the security of American communications and for breaking into the communications of other countries.
the United States cryptologic organization that coordinates and directs highly specialized activities to protect United States information systems and to produce foreign intelligence information
Agency of the U. S. government responsible for intercepting foreign communications for intelligence reasons and for developing crypto systems to protect U. S. government communications.
the US governmental body involving cryptanalysis and cryptography.
http://www.fas.org/pub/gen/fas/irp/nsa
The official security body of U.S. government
The government agency tasked with making codes, breaking foreign government codes, and intercepting Electronic Intelligence (ELINT), Signals Intelligence (SIGINT), Photographic Intelligence (PHOTINT), and Communications Intelligence (COMINT) overseas. The technical term for codes is cryptography. They are also involved in Information Systems Security (INFOSEC), to help protect U.S. government computer systems from foreign governments. National Security Agency
A United States government agency reportedly responsible for monitoring and decoding all foreign communications of interest to the security of the United States.
The National Security Agency/Central Security Service (NSA/CSS) is the U.S. government's cryptologic organization. Officially established on November 4, 1952, it is believed to be the world's largest intelligence-gathering agency. Responsible for the collection and analysis of foreign communications, it coordinates, directs, and performs highly specialized activities to produce foreign signals intelligence information, which involves a significant amount of cryptanalysis.
