An official website of the United States government

Here's how you know

Official websites use .mil

A .mil website belongs to an official U.S. Department of Defense organization in the United States.

Secure .mil websites use HTTPS

A lock () or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

About Us

Empowering Insight, Innovation, and Action for a Secure Cyberspace

DC3 empowers action in cyberspace through innovation, collaboration, and world-class training to reduce cyber risks and build a secure future.