The National Security Agency/Central Security Service (NSA/CSS) is a Combat Support Agency of the Department of Defense (DoD) under the authority, direction, and control of the Secretary of Defense.  The Assistant Secretary of Defense (Command, Control, Communications, and Intelligence) (ASD(C3I)) exercises overall supervision of NSA/CSS.  The NSA implements the SecDef’s Presidentially-assigned responsibility as the Executive Agent of the United States Government for signals intelligence and communications security, and conducts related activities as assigned by the SecDef.  The Director of the NSA also serves as the Chief of the CSS, which provides the Military Services a unified cryptologic organization within the Department of Defense designated to assure proper control of the planning, programming, budgeting, and expenditure of resources for cryptologic activities.

TABLE OF CONTENTS