faq

What is a 'Danish team'?
3 out of 5 team members must either be Danish citizens or residents.
What info do I need to provide to register?
Just an alias and a team e-mail address where we can reach you if your team qualifies for the final.
My team has 37 members. Can we still play?
Yes... by registering (at least) 8 teams. But remember that you *must not* share flags between teams.
I don't have a team. Can I still play?
Yes. Just register a team for yourself. You will not receive bonus points for playing alone, though.
How do I know if my team is qualified for the final?
We will contact you directly on your registered team e-mail address.
What kind of challenges can I expect?
We strive to test players in a wide range of skills. Expect the usual categories: pwnable, reversing, web, crypto, etc.
How many challenges will there be?
Enough. Challenges will be available at the start of the competition and more will be opened progressively. It will *not* be announced beforehand when new challenges are available, nor how many there are in total.
What is the flag format?
flag{ascii range 0x20-0x7e inclusive, except 0x5c and 0x7d}
What kind of scoring do you use?
We use dynamic scoring. Score calculation is as follows.
P = 1'000'000
Total number of points distributed across all teams (except maybe a few lost to rounding).
C
The set of solved challenges (by any team).
T
The set of teams.
Challenge weight, set by organizers for each challenge. This value is typically one for regular challenges, and 1/n for each challenge in a series of n. The weight is displayed below the title of each challenge.
Sum of weights for all solved challenges. Used for normalization.
R(t, c)
Team ranking, per challenge: 0 if team t solved challenge c first, 1 if second, etc., until ∞ if t did not solve c.
Team weight, per challenge, based on the team's ranking for that challenge.
Sum of team weights for a given challenge. Used for normalization.
And now the score attributed to a given team, t, can be computed:
I have a question which is not the FAQ.
That is not really a question. But you're welcome to contact us with your question.
Is the event listed on CTFtime?
Yes and no. The qualifier is listed on CTFtime, but the final will *not* be listed, since it is only open to Danish teams.
Will you install a root kit on my computer if I play?
No. We will not release challenges containing malware.
Will I need real world 0-days to solve some of the challenges?
No. Some challenges *may* require real world exploits, but in those instances the vulnerablity(/ies) will be public knowledge.

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