Sign in to take a station. Your challenges and flags are yours alone.

Development mode: a new username creates its account.

Instructor sign-in.

Create your account to join the challenges. We email a link to confirm your address.

Enter your registered email. If it’s in our system, we’ll send a link to choose a new password.

Registered but not verified yet? Enter your username or email for a fresh link.

Choose a new password for your account.

Your account still uses your student ID as its password. Choose a new one to continue.