The Central Security Service (CSS) oversees the function of the military cryptologic system, develops policy and guidance on the contributions of military cryptology to the Signals Intelligence/Information Security (SIGINT/INFOSEC) enterprise, and manages the partnership of NSA and the Service Cryptologic Components. NSA as a whole is known as "NSA/CSS."
The CSS provides timely and accurate cryptologic support, knowledge, and assistance to the military cryptologic community. It promotes full partnership between NSA and the cryptologic elements of the U.S. Armed Forces, and teams with senior military and civilian leaders to address and act on critical military-related issues in support of national and tactical intelligence objectives. CSS coordinates and develops policy and guidance on the Signals Intelligence and Information Assurance missions of NSA/CSS to ensure military integration.