Committee on
National Security Systems

Meeting Current and Future Threats


CNSS is closed

CNSS is closed until further notice.

Problems Opening CNSS Documents

If you are having security certificate problems opening CNSS documents from the website, please try to "right click" and save the file to your desktop before opening.

Inclement Weather

With the large geographic area of our membership, it is difficult to judge when or if weather conditions warrant the cancellation of CNSS meetings (to include Committee, Subcommittee, or Working Group meetings). Our first consideration, is safety. If the Office of Personnel Management reports that the Federal Government Operating Status for the Washington, DC area is either "Closed", “Delayed Arrival”, or “Open with Option for Unscheduled Leave or Unscheduled Telework,” any CNSS meeting scheduled for that day will be cancelled.

TSG Approved Telephones List

To access the most current TSG Approved Telephone List, please go to “ABOUT” and click on “Related Sites.” From there you can click on “National Counterintelligence and Security Center (Approved Telephone List).”

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

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 ...