WHYcast history episode 24

Episode 24 – The CTF Legacy: Dutch Hacker Camps and Community Traditions

The Historical Roots of Capture the Flag at Dutch Hacker Camps

In this episode, the hosts delve into the vibrant tradition of Capture the Flag (CTF) competitions that have become a cornerstone of the Dutch hacker camp experience. The interview with Thijs, team lead for the WHY2025 CTF, offers a window into the evolution of CTFs at these gatherings and their enduring role in shaping the community’s culture.

Thijs begins by explaining the basics of CTF: a hands-on, challenge-based competition where participants solve tasks in categories like network, web, reverse engineering, forensics, and hardware to “capture flags” and earn points. The CTF is not just a contest but a social and educational activity, bringing together both veterans and newcomers in a spirit of curiosity and playful competition.

Reflecting on the event’s history, Thijs recounts how his involvement in CTFs began over 15 years ago, initially as a solo participant before joining Dutch teams such as Einbasen around 2010 or 2011. This period marks a significant era in the Dutch CTF scene—teams from the Netherlands began distinguishing themselves internationally. Thijs’s team reached the finals in Russia and Korea during 2012 and 2013, winning several major competitions—clear evidence of the Netherlands’ rising prominence in the global CTF circuit. This international success not only inspired individual participants but also strengthened the local community’s sense of achievement and collaboration.

A pivotal historical moment for Dutch hacker camp CTFs came with OHM (Observe Hack Make) 2013. Thijs and his peers, seasoned as competitors, made the leap to becoming organizers, designing their first large-scale, on-site CTF. This transition represented a new chapter in the community’s tradition: not only excelling as players but also building intricate, robust, and creative puzzles for others. Thijs describes the challenge of this shift as “building an escape room on steroids,” highlighting the meticulous planning, testing, and creativity required to make the CTF engaging and fair.

The CTF tradition continued to evolve at subsequent Dutch hacker camps—SHA (Still Hacking Anyway) in 2017 and MCH (May Contain Hackers) in 2022. At these events, the CTF tent became a central hub for learning and play. Thijs describes memorable puzzles from past camps, such as lock-picking challenges, where participants physically picked locks to retrieve flags, and wireless sniffing challenges that required building or hacking hardware to capture signals. These activities exemplify the hands-on, interdisciplinary spirit of hacker camps, blending digital and physical puzzles and encouraging experimentation.

Anecdotes from past camps illustrate the culture of playful ingenuity and occasional boundary-pushing that characterizes hacker gatherings. Thijs recounts the most “elegant” cheat he’s witnessed: players surreptitiously scouting upcoming puzzles to gain an edge by researching background information—a move he considers “sneaky but acceptable” if done subtly. In contrast, he recalls a more egregious act: a participant breaking open a lock-picking enclosure with a knife to forcibly retrieve a flag. Such stories underscore both the creativity and the need for robust design in CTF puzzles, as well as the community’s evolving norms around fair play.

The episode also touches on the broader significance of CTFs at Dutch hacker camps. These competitions serve as a gateway for newcomers—especially youth and families—to engage with the hacker community. Thijs notes that at recent events like MCH, the CTF team designed family-friendly puzzles and field games, such as the Secret Token Challenge, to encourage participation from attendees of all ages. The recurring scene of eager participants lining up before the tent opens each morning is a testament to the enduring appeal and inclusivity of these activities.

The discussion is contextualized within the ongoing tradition of Dutch hacker camps, which have long fostered a culture of community-driven learning, experimentation, and welcoming newcomers. The hosts emphasize that the hackerspace movement—the network of physical spaces across the Netherlands and beyond—acts as a breeding ground for the next generation of hackers, many of whom find their way to these camps and the CTFs within.

In summary, this episode weaves together personal recollections, community milestones, and cultural traditions that define the CTF experience at Dutch hacker camps. From the early days of team formation and international competition to the present-day focus on inclusivity and creative puzzle-making, the CTF story reflects the broader evolution of Dutch hacker culture: collaborative, inventive, and ever-welcoming to new faces.