About
This is a public archive of CTF (Capture The Flag) writeups — information security challenges solved and documented step by step, for anyone who wants to learn by reading how someone else reasoned their way to the solution.
Content is published in Portuguese, Spanish and English, and organized by category (web, pwn, reverse, crypto, forensics...), difficulty, topic, CTF organizer, author and month published — use the filters on the home page to browse.
Each writeup is signed by whoever wrote it — the author may vary from one piece to another as more people contribute to the archive.
Responsible publication. Writeups here are only published after the CTF has ended (or per the event's specific rules), with no real credentials, personal data, or infrastructure secrets — the goal is purely educational.