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The Information Assurance mission provides the solutions, products, and services, and conducts defensive information operations, to achieve information assurance for information infrastructures critical to U.S. national security interests.
The foreign signals intelligence or SIGINT mission allows for an effective, unified organization and control of all the foreign signals collection and processing activities of the United States. NSA is authorized to produce SIGINT in accordance with objectives, requirements, and priorities established by the Director of Central Intelligence with the advice of the National Foreign Intelligence Board.
Maybe someone on the same level as "deep Throat."--that would mean someone in the agency.