Committee on
National Security Systems

Meeting Current and Future Threats

Notices

Problem opening CNSS Documents

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


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 ...


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 ...