Join us in Oslo!

What is a CTF?

CTF (Capture The Flag) is a competition where you solve different challenges within cybersecurity, coding, and logical puzzles. It is a great opportunity to learn more about IT security, regardless of your experience.

Is it for me?

We have challenges in many different categories with varying difficulties. Whether you are a beginner or a seasoned player, there should be something for you to enjoy solving!

There will be challenges for beginners to help them learn new techniques and further expand their IT and cybersecurity knowledge.

How can I participate?

You can participate both online and physically. The competition itself lasts 48-hour over the span of 3 days.

We urge you to join us physically, if possible, as it is a great opportunity to network and socialize with fellow hackers. Regardless of your physical presence, you are more than welcome to participate in the CTF online.

About the CTF

NNS CTF 2026 will take place from Friday, 4 September at 16:00 UTC to Sunday, 6 September at 16:00 UTC. You may participate individually or as a team.

There will be challenges in various categories such as web, misc, crypto, blockchain, DevSecOps, rev, pwn, community-made, and more.

Join our Discord server for announcements and support. Learn more about the CTF in the info & rules