Soldier on the battlefield with field communication equipment superimposed on a screen of data with a security lock and a world map in the background.

Two technicians working on equipment racks superimposed on a screen of data with the words 'System Proteceted' highlighted.

Two technicians in an equipment room consulting a policy manual is superimposed over the image of a Predator drone with a screen of data in the background.

A soldier with several policy manuals is superimposed over the pentagon with a screen of data in the background.

Security personel watching moitors of with multiple views of an installation superimposed over a globe with lines depicting network connections and a screen of data in the background that has the words 'Data Breach' highlighted.

Committee on
National Security Systems

Meeting Current and Future Threats

Our Library

The Committee on National Security Systems (CNSS) Library contains those issuances permitted on the internet that address cybersecurity issues. The Library is divided into categories such as Policies, Directives, Instructions, and Advisory Memoranda, as well as offering a Search of all the documents published by the CNSS Secretariat. Find out more about the CNSS Library ...

Latest Posts

10/17/2023
INSTRUCTION FOR A SYSTEM TRANSMISSION SECURITY (TRANSEC) PLAN
10/17/2023
(U) OPERATIONAL SECURITY DOCTRINE FOR CIPHERTAC2000 (CTAC2000)
11/16/2022
Operational Security Doctrine for the FORTEZZA User Personal Computer Memory Card International Association (PCMCIA) Card

Top Downloads

03/07/2022
Committee on National Security Systems (CNSS) Glossary
11/19/2013
Security Categorization and Control Selection for National Security Systems
05/09/2014
Classified System Overlay

Note: Some of our documents include protected information. To access this protected information, you must use a Federal/DoD PKI/PIV/CAC client certificate. Find out more about certificates and site access ....

Our Mission

The Committee on National Security Systems (CNSS) sets national-level cybersecurity policies, directives, instructions, operational procedures, guidance and advisories for United States Government (USG) departments and agencies for the security of National Security Systems (NSS). It provides a comprehensive forum for strategic planning and operational decision-making to protect NSS and approves the release of INFOSEC products and information to Foreign Governments. Find out more about the CNSS ...