Crate-CTF 2026
- Starts
- Ends
- Runs for
- 8 hours
- Format
- Jeopardy (online)
- Rating weight
- 37.00 - Strong field
- Teams registered
- 1
Run by Crate-CTF.
What the organisers say
Crate-CTF is an annual Capture The Flag (CTF) competition organised by the Swedish Defence Research Agency in collaboration with the Swedish Armed Forces, designed to introduce high school and university students to the field of cybersecurity. This year we return for our seventh CTF, with challenges for all skill levels from beginners to seasoned CTF players.
Prep briefing
What past editions were made of
Counted across 1 challenges from 2025, 2024, using the categories the scoreboards themselves used. Two things to hold in mind while reading it. The archive indexes challenges that someone published a solution to, not whole scoreboards, so this is the shape of what people wrote about rather than of everything that was set. And where a scoreboard gave no category the challenge lands in misc, so a large misc slice means “unlabelled” rather than “miscellaneous”.
1 challenges is a thin sample. Read the split below as a hint about this event rather than as its profile, and lean on the linked editions instead - they are the actual record.
- misc 100%(1)
What to have open when it starts
Misc
Misc is whatever did not fit, which in practice means encodings and esolangs. Identify, do not guess.
- Cipher identifier and automatic decoder
- Recipe builder: chain decodes and transforms
- Brainfuck and esolang decoder
- Base64 decoder and encoder
- Regex tester with match offsets and capture groups
New to this? Read Recognising encodings, Misc and esoteric languages
The challenges people wrote about most
From previous editions, ordered by how many published solutions each attracted. Reading two solutions to one of these is the closest thing to a warm-up for this event that exists.
- XML-kontrollmisc · 2024 · 1 writeup