Maintenance Updates

Check the News page for details. (Latest: Tue, 24 Sep 2019 ~ 07:30 GMT)


This year’s challenge is our most ambitious release ever and we are excited to see how you all do. We apologize for the slight delay in the launch this weekend, but think you’ll find it was worth the wait. Good luck and thanks for your participation in the NSA Codebreaker Challenge!

Welcome to the 2019 Codebreaker Challenge!

To get started, register for an account using your email address. Then, visit the Challenge page.