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Be the First to CrackRules
- Sharing solutions or flags publicly is prohibited
- Brute-force attacks on keys, endpoints, or the platform are not allowed
- Work with cryptanalysis, not denial-of-service
- Collaboration is fine, but final submissions must be your own
- Respect other participants — no toxicity or harassment
- Only attack the intended cryptography challenges
- Keep flags secret — no posting them in public channels
- If you find unintended flaws in the platform, report them responsibly
- No multiple accounts or point farming
- Play fair — attempts to cheat will result in disqualification
- This platform exists to learn, compete, and have fun with crypto
About
crackable.xyz is a cryptography-focused CTF platform for puzzle-solvers, security researchers, and learners who want to master the art of breaking codes and unlocking secrets.
Challenges range from classical ciphers to modern cryptanalysis — RSA, ECC, lattices, post-quantum schemes, and everything in between. Each problem is designed to sharpen your mathematical reasoning while staying safe, fun, and competitive.
Founded in 2025, our mission is to make high-quality crypto training accessible to all. Whether you’re solving substitution ciphers or tackling cutting-edge algebraic attacks, there’s a challenge for you.
We’re also community-driven: members can contribute challenges, discuss techniques, and grow together as cryptographers. Want to be part of it? Join our Discord.