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Information Assurance

The Information Assurance (IA) mission at the National Security Agency (NSA) serves a role unlike that of any other U.S. Government entity. National Security Directive (NSD) 42 authorizes NSA to secure National Security Systems, which includes systems that handle classified information or are otherwise critical to military or intelligence activities. IA has a pivotal leadership role in performing this responsibility, and partners with government, industry, and academia to execute the IA mission.

Now that cyberspace is the primary arena in which we protect information, we are working toward shaping an agile and secure operational cyber environment where we can successfully outmaneuver any adversary. A key step in building Confidence in Cyberspace is a willingness to offer what we know. Please visit our site at to learn more about our unique experiences and capabilities.

Note: The IAD.Gov website uses TLS 1.2, supported by a Department of Defense (DoD) PKI certificate, to ensure confidentiality and integrity for all users. IAD.Gov website users will need to have the current DoD Root and Intermediate Certificate Authorities (CA) loaded into their browsers to avoid receiving untrusted website notifications.

To access the Information Assurance Directorate website:

  1. Install DoD Root and CAs
    Please visit the Information Assurance Support Environment (IASE) site to download the DoD Root CA Certificates. Select the Trust Store tab and choose the latest InstallRoot: NIPR Windows Installer.
  2. Go to