A U.S. Department of Defense combat support agency and member of the U.S. Intelligence Community


The National Security Agency/Central Security Service (NSA/CSS) leads the U.S. Government in cryptology that encompasses both signals intelligence (SIGINT) insights and cybersecurity products and services and enables computer network operations to gain a decisive advantage for the nation and our allies. Throughout the site, NSA/CSS will be referred to collectively as NSA.

Central Security Service

Central Security Service provides timely and accurate cryptologic support, knowledge, and assistance to the military cryptologic community, while promoting partnership between the NSA and the cryptologic elements of the Armed Forces.


NSA Cybersecurity prevents and eradicates threats to U.S. national security systems with a focus on the Defense Industrial Base and the improvement of our weapons’ security. Through our Cybersecurity Collaboration Center, NSA partners with allies, industry and researchers to strengthen awareness to advance cybersecurity outcomes.

Signals Intelligence

NSA provides foreign signals intelligence (SIGINT) to our nation's policymakers and military forces. SIGINT plays a vital role in our national security by providing America's leaders with critical information they need to defend our country, save lives, and advance U.S. goals and alliances globally.

Cybersecurity Collaboration Center

NSA’s Cybersecurity Collaboration Center harnesses the power of industry partnerships to prevent and eradicate foreign cyber threats to National Security Systems, the Department of Defense, and the Defense Industrial Base.


NSA has offices around the world with four cryptologic centers across the United States.

Strategic Environment

NSA postures to prevent and eradicate threats and help the United States and its Allies defeat adversaries consistent with its authorities and with guidance from various national strategies.

Customers & Partners

NSA partners with other U.S. Government and military agencies and allies to execute its missions in signals intelligence and cybersecurity.