Specifications
| Format | Challenges |
|---|---|
| Level | Beginner, Intermediate, Advanced |
| Price | Free |
| Access | Registration required |
| Activity | Rarely updated |
| Language | FR, EN |
| Category | Web, Pwn, Cryptography, Reverse, OSINT, Forensics, Systems |
A large CTF archive with several hundred challenges across the usual categories, from basic web to reversing and crypto. The format is classic: statement, flag, submit through a form. Worth knowing before you plan a session: the site sits behind an anti-bot.
Pros & cons
Pros
- Breadth across the usual categories, rare topics need no hunting elsewhere
- Difficulty rating per challenge, which makes picking a level straightforward
- Free with an account, and registering takes a minute
Cons
- An Anubis proof-of-work sits in front of the site: first load costs time, some automated requests are dropped
- Challenges are written in French, the English edition is a translation and drifts from the original
- New challenges arrive unevenly, so treat it as an archive rather than a feed
Who it fits
Works as a task bank once your main platform runs dry: sorting by difficulty surfaces something unsolved in a familiar category fast. Worth the proof-of-work wait if you come back.
Getting started
- Clear the proof-of-work once on first entry, then bookmark the site
- Sort by difficulty and start at twenty points
- Count solved tasks per category, the thinnest one is your next topic
History
Run for years by a French team and now holding several hundred challenges. New tasks land unevenly, which is why it counts as slowing rather than active. Anubis, the proof-of-work anti-bot, still guards the site, and the challenge count was never verifiable from outside.