dJulkalendern is a CTF-competition hosted by the Computer Science (Konglig Datasektionen) Chapter of THS (Tekniska Högskolans Studentkår).
After completing atleast 5 challenges you are allowed to buy a dAnkan patch on one of the computer chapters patch sales, usually happening every other Wednesday.
The Organisation
DatasektionenJudges
Alvin "All3eee" Hävrén djul@datasektionen.se
Mathias "Food Elevator" Magnusson
Douglas "bigd0g" Fischer
Discord