[TeamH4C] What Changes When You Join a Hacking Team?
Today, I want to share what I have learned as a member of TeamH4C and how joining the team has changed the way I study and spend my time.
How I Joined TeamH4C
When I first started studying digital forensics, I did not know where to begin. Even after reading everything I could find, I was never sure whether I was studying the right way, and I had little idea how to prepare for a career in the field.
I did not have anyone I could ask, either. I did not know any senior students or professionals working in digital forensics.
Then I joined TeamH4C. H4C is a white-hat hacking team where students studying security work alongside industry professionals. The team consists of groups covering a wide range of areas, including CTF competitions, digital forensics, red teaming, AI security, research, education, law, and policy. I joined D4C, the group focused on digital forensics and incident response.
Once I joined, I discovered that more members than I had expected were alumni of my university. That connection made it easier to bring up questions I had always wanted to ask, and I quickly began to feel that I belonged.
People Who Notice, Encourage, and Lead
What I value most about being on the team is that it gives me the motivation to keep learning consistently.
Team members share what they learn through their studies and competitions, and they take an interest in one another's work. Seeing their dedication makes me want to push myself a little further too.
I am especially inspired by Juhan, who leads TeamH4C. Even with a demanding schedule, he is one of the team's most active members. When someone looks tired, he notices and checks in first. His encouragement has helped me regain my motivation more than once.
Of all the things he has said, one line has stayed with me the most:
“If you want to be a professional, act like one.”
Because I had already seen how he conducted himself, the words carried even more weight. I understood them as a reminder to approach both studying and assigned work with responsibility. I am trying to put that into practice by making sure I truly understand what I do not know and by following every task through to completion.
Watching him take the initiative and encourage others has helped me understand why everyone on the team works so hard. The rest of the team sustains that atmosphere by supporting one another.
I have also been impressed by how people respond to different opinions. When I share an idea, Juhan listens closely and adds his perspective. The leads and members of each group make the same effort to hear one another out.
As someone who is still learning, I sometimes hesitate to speak because I worry that I may have misunderstood something. But knowing that people will listen and think it through with me makes it easier to speak up the next time.
Finding Direction in My Studies
Team members advised me to solve problems from past competitions on my own and write reports explaining my process. They also told me that if I truly could not understand something, I should use AI or any other available resource to work through it rather than simply moving on.
Based on that advice, I still follow this process today:
Attempt a problem from a past competition
Record where I got stuck and what I tried
Use references or AI to understand the missing pieces
Check what I learned against the actual challenge data
Document the process and supporting evidence in a report
At first, I thought finding the answer or understanding someone else's solution was enough. But when I tried to write a report, I got stuck on the question, “What in this record supports that conclusion?” I could state the answer, but I struggled to explain in my own words how I had arrived at it.
So I began recording both the artifacts I examined and the reasons behind each conclusion as I worked. I wrote down where each record came from and what it could tell me. When I could not explain something, I looked for more material or asked AI to walk me through a simpler example. Then I checked that explanation against the actual challenge data and summarized what I understood in my own words.
Now, while solving a problem, I also look for the evidence I will need in the final report. That is very different from waiting until the problem is over and then going back through the data to reconstruct my process. Little by little, I am moving from “I know the answer” to “I can explain why it is the answer.”
Conversations About Security and AI
When we meet in person at events such as workshops, we can explore security topics in greater depth. A quick question leads to someone else's experience, which leads to another question, and the conversation keeps going. It would be difficult to have discussions this detailed with most of my university friends.
Because team members study different subjects and come from different professional backgrounds, they bring a variety of experiences to the same topic. AI is one subject that comes up often.
We talk about how advances in AI may change security work and what people who are just beginning to study the field should prepare for. Those concerns naturally lead to conversations about how we should use AI today.
For example, we discuss which AI models to use for a CTF, whether to apply a Skill containing task-specific instructions, and how much weight to give benchmark results that compare different models.
I explain how I have used AI and listen to approaches other members have tried. We compare whether the performance reported in benchmarks carries over to real CTF challenges and how results differ when people use the same model in different ways. Some of those approaches are ones I want to try in my own studies.
I expect AI to remain part of how I study and work in security. That is why I keep discussing with my teammates how to use it more effectively and which parts I still need to understand and verify myself.
Having Someone to Ask About a Career
When a member's company begins hiring, they share the opening with the team. If a position catches my interest, I can ask what kind of work an entry-level employee would do and what would be useful to prepare while I am still a student. Being able to hear directly from someone who works at the company is especially valuable. A role that felt vague in a job posting becomes much more concrete when someone doing the work explains it.
Students on the team also share their experiences when choosing training programs or projects. I can ask someone who has already completed an activity what preparation it required, what they found rewarding, and what they found difficult. Hearing from someone with firsthand experience makes it much easier to decide whether an opportunity is right for me.
For someone who once had no idea where to meet people further along in digital forensics, this is a major change. Now, when I am thinking about my studies or career, I often find myself saying, “I should ask the team about this.” To me, the greatest benefit of having this network is simply having people I feel comfortable asking.
Taking On Competitions Together
The first competition I entered with other members after joining TeamH4C was the 2026 HSPACE DIGITAL FORENSICS CHALLENGE. We took first place in that very first competition.
I believe we achieved that result because we actively exchanged ideas. As we prepared, we became comfortable speaking informally with one another, which made it much easier to share where we were stuck or bring up a new thought. We kept each other updated on which problems we were examining and how far we had progressed.
When someone hit a roadblock, they explained which data they had checked, what they had tried, and what happened. Other members then suggested what to examine next. Even tentative ideas were put on the table and reviewed together. Although we were working on different problems, knowing one another's progress made it easy to exchange suggestions throughout the competition.
I also organized and shared the artifacts I found and the reasoning behind my conclusions, and I helped the team prepare our report. I paid particular attention to explaining the evidence so that other members could follow the solution. From my very first competition, I learned that sharing the process matters just as much as solving the problem.
After working through the challenges together and achieving such a strong result, I wanted to compete with the team again. Now, whenever I hear about a major domestic or international CTF or forensics competition, I immediately think of the people I could take it on with.
At other competitions, I am always glad to run into fellow H4C members in person. Afterward, we talk about the hardest challenges and compare how we approached them. It is reassuring to hear that someone else struggled with the same part I did, and it is fascinating to learn about solutions I had never considered.
The Sense of Belonging to a Team
As we have spent more time together, I have gradually grown closer to the other members. We chat and joke in the group channel, welcome new members, and celebrate one another's good news.
My sense of belonging has grown along with those relationships. At first, I thought I had settled in quickly because several members had attended my university. Looking back, though, I think I would have felt at home even if we had gone to different schools. These are people who respect one another's opinions, spend hours discussing subjects they care about, and take on competitions together.
I now try to share what I learn and think through other people's concerns with whatever knowledge I have. Just as the team has given me strength, I want to become the kind of teammate who can do the same for someone else.
If, like me, you feel uncertain about how to direct your studies or do not know where to meet people in the field that interests you, I hope you will look for a team where you can learn alongside others. At TeamH4C, I found both mentors I can turn to with questions and peers who will take on challenges with me.
Wouldn't you like to learn with a team like this too?