Next
International · On site Securinets CTF Finals
The top teams from the online qualifier meet at INSAT to compete for the title and 50k+ TND in prizes and packages.
Mid-December 2026 · INSAT, Tunis
securinets.tn/ ctf
Capture the flag
Crack codes, solve problems and climb the scoreboard. From your first friendly CTF to the international Finals.
New to CTFs?
How it works
What is a CTF?
A Capture The Flag is a security competition. Each challenge simulates a real scenario: a vulnerable website, a binary to crack, an encrypted message. Solving it reveals a hidden string, the flag, which you submit for points.
How does it work?
You play alone or in a team. Challenges are grouped into the six categories, and harder ones are worth more points. The team with the most points when time runs out wins.
Why take part?
It is the fastest way to turn theory into skill, it is fun, and strong CTF results are noticed by employers. Our Friendly CTF is made for first-timers.
The circuit
Our CTFs
Five competitions a season, from beginner-friendly to international.
Closed
Online · Open Securinets CTF Quals
The open qualifier. Teams from around the world compete for a place in the Finals.
October 2026
Friendly CTF
A supportive first CTF for members learning the basics.
Date to be announced
Darkest Hour CTF
A night-time CTF at INSAT with a scoreboard that never sleeps.
Date to be announced
Cybersphere CTF
The competition at the heart of the Cybersphere Congress.
Date to be announced
Legacy
Our CTFs so far
- 1,000+Participants across our CTFs
- 150+Challenges solved in past editions
- 100+Teams competing across all CTFs
Behind the scenes
The people who write the challenges
Ready to capture your first flag?
Join 500+ members learning, competing and building together. Our workshops start from zero.