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Moonlighter Deployment NRCSD26


Moonlighter was deployed on July 6th at 6:05am ET.

We have liftoff! A new era of space cyber security has begun.


Moonlighter launched on June 5, 2023, aboard SpaceX CRS-28 bound for the ISS.

Countdown to Finals at DEF CON


Finalist Teams

Congrats to the winners and thanks to the 700+ teams who participated in Quals!

Hack-A-Sat is a Capture the Flag (CTF) competition designed to inspire the world’s top cybersecurity talent to develop the skills necessary to help reduce vulnerabilities and build more secure space systems.

In Hack-A-Sat 1, 2 and 3, the best of the best have been learning more about all the skills required to hack in space through physical flatsat hardware and digital twin simulation. But, this year, PRACTICE IS OVER, as Hack-A-Sat 4 presents the world’s first CTF competition IN SPACE. Five Finalist Teams will compete on Moonlighter, an on-orbit satellite. Moonlighter is the world’s first and only hacking sandbox in space, designed specifically to advance the cyber security community and secure space for us all.

Important Details

Qualification Round:
April 1-2, 2023

Moonlighter Launch:
June 5, 2023

Final Event @ DEF CON 31:
August 11-13, 2023
Find us in the Aerospace Village! 

Stay Informed

More about Hack-A-Sat

The Department of the Air Force presents Hack-A-Sat, open to all cybersecurity researchers who want to up their skills and knowledge of space cybersecurity. This Capture the flag challenge begins with a Qualification Event and culminates in a Final Event that will take place in the Aerospace Village at DEF CON 31 in Las Vegas.

Whether you’ve been with us since the start in 2020 or are just tuning in, you are in the right place to catch up on all the competitions, get educated on hacking in space and even practice building your own CubeSat like Moonlighter.