Note

Some challenges were hosted on our infrastructure. They are now available as Docker images which you can download and run on your own computer. If you want to solve the challenges in the same way as the participants of the CTF, you should treat these Docker instances as blackboxes and avoid peeking in them.

Warm up

We tweeted three warm up “puzzles” in the days leading to the event. The first two are pieces of data and code you need to explore. The third has exactly one solution.

Warm up 1, 2 & 3

Rules

https://squarectf.com/2019/rules.html

Challenges

Results

https://squarectf.com/2019/results.html

Write Ups

https://squarectf.com/2019/write_ups.html

See also

Work_at_Square(1), Privacy_policy(1), Code_of_conduct(1)