The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Enter the DoD ID number from the back of your common access card (CAC) into the “Known Traveler Number” field of your flight reservations or when updating your Defense Travel System profile for official travel.
DoD federal civilian employees must opt-in via milConnect before using their Known Traveler Number.