TU Delft CTF 2025
TU Delft's annual beginner-friendly hacking competition
Diamond sponsors
Gold sponsors
Silver sponsors
About
The TU Delft CTF Team is organizing a beginner-friendly Capture The Flag competition open to everyone. In groups of 4, you will complete a series of challenges you can solve by hacking, reverse engineering, and exploiting vulnerabilities. If you are new to cybersecurity, this is the perfect opportunity to learn and have fun.
Last year, with 200 participants, TU Delft CTF 2024 became the biggest beginner-friendly cybersecurity competition in the Netherlands. This year, we are expanding the competition to 350 players!
Challenges of varying difficulty will be available, so there is something for everyone. There will be multiple categories, including:
- Web Security
- Reverse Engineering
- Forensics
- Cryptography
- Binary Exploitation
- OSINT
- Miscellaneous
The CTF will be in Jeopardy style, meaning that you can solve the challenges in any order. The team with the most points at the end of the competition wins. Each challenge will have a flag that you need to find and submit to the scoreboard to earn points.
At the start, all challenges are worth the same amount of points. As more teams solve a challenge, the points decrease for all teams, including teams that have already solved it. This means that harder challenges, which fewer teams solve, will be worth more points than easier challenges.
When and where?
The competition will take place on Saturday, 15th of November, 2025, on the TU Delft campus, in Echo (Building 29). The address is Van Mourik Broekmanweg 5, 2628 XE Delft.
It is not possible to participate remotely, so make sure to be there on time!
Registration
Registration is open to everyone, regardless of experience. The competition is played in teams of 4.
You can register as a member of a team or as an individual. If you register as an individual, we'll match you with others. Alternatively, you can find potential teammates and form a team on our Discord server.
Registration is free. You can register on our registration portal.
Registration closes on the 7th of November, 2025, or when 350 players have registered. Make sure to register on time, as we have a limited number of spots available.
If you have any questions, feel free to reach out to us at ctf-ewi@tudelft.nl.
Schedule
The hall will be open from 09:30, and the competition will start at 10:00. Please make sure to be on time, as we have to check everyone in before the competition starts.
- 08:15-8:45 - (Optional) Beginner session check-in
- 08:45-9:30 - (Optional) Beginner session
- 09:00-09:45 - General check-in
- 09:50 - Opening
- 10:00 - Competition start
- 17:00 - Scoreboard freeze
- 18:00 - Competition end
- 18:10 - Prize ceremony
- 18:30 - Closing
Rules
To ensure a fair competition, we have a few rules that all participants must follow. If you break any of these rules, you may be disqualified from the competition.
- Do not attack other teams, the infrastructure, or the competition platform.
- Do not share flags, solutions, or hints with other teams during the competition.
- Do not brute force flags on remote services, unless the challenge description explicitly allows it. If you can brute force a flag locally in a reasonable amount of time, that is allowed.
- 350 participants
- 60+ challenges
- 8 hours of hacking
Become a sponsor of TU Delft CTF 2025
For the 4th edition of TU Delft CTF, happening on 15 November 2025, we are massively increasing the number of participants, from 200 to 350 players. We are looking for sponsors to help us make this event a success.
As a sponsor, you will have the opportunity to reach a large audience of students and young professionals interested in cybersecurity and hacking.
Shoot us an email at ctf-ewi@tudelft.nl to discuss sponsorship opportunities. We are open to discussing any ideas you may have, and we can tailor our sponsorship packages to meet your needs.
Why sponsor TU Delft CTF?
- Connect with top talent: Engage directly with hundreds of students interested in cybersecurity
- Enhanced visibility: Showcase your brand to TU Delft's cybersecurity research community and ethical hackers who represent future industry leaders
- Industry leadership: Position your organization as a champion of cybersecurity innovation and talent development
- Educational impact: Support accessible cybersecurity education and help build the next generation of cybersecurity professionals
Our offer
We offer tailored packages, including:
- Prominent logo placement on our website, on event materials, and on-site
- Recruitment and networking opportunities with talented cybersecurity enthusiasts
- Featured mentions in event communications, social media campaigns, and press releases
- Company booth at the event to engage with participants
- A dedicated slot for a speaking opportunity
- An option to run branded challenges during the competition
Sponsoring in non-monetary ways is also possible, such as providing prizes, catering, hardware, or other resources. We are open to discussing any ideas you may have.
Let's Build TU Delft CTF 2025 Together
Interested in supporting the next generation of cybersecurity experts? Contact us at ctf-ewi@tudelft.nl to discuss sponsorship opportunities.
About the TU Delft CTF Team
The TU Delft CTF Team is the Capture the Flag student team of TU Delft, hosted by the EEMCS Cybersecurity group. We are a group of students passionate about cybersecurity, reverse engineering, and hacking.
We meet every tuesday evening to work on challenges, present solutions to each other, and learn more about cybersecurity. We also participate in Capture the Flag competitions, where we solve challenges to earn points and compete against other teams.
If you are interested in joining us, feel free to join our Discord server. We welcome everyone, regardless of experience. Whether you are a beginner or an experienced hacker, you are welcome to join us and learn more about cybersecurity. We don't have any "membership" or "application" process, so you can just join us on Discord and start participating in our meetings and activities.
Contact us
If you have any questions about TU Delft CTF, would like to discuss sponsorship opportunities, or join our team, feel free to reach out to us at ctf-ewi@tudelft.nl.