Crackable

Numbers whisper. Hashes lie. Primes betray.

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About Crackable

Welcome to Crackable — a dedicated cryptography challenge platform where you can master the science of secure communication through hands-on problem solving.

Explore challenges spanning the full spectrum of cryptography:

  • Classical Ciphers
  • Symmetric Encryption
  • Public Key Cryptography
  • Hash Functions & MACs
  • Digital Signatures
  • Cryptanalysis

Latest News

Crackable Is Live!

Jan 04, 2026

Crackable is a cryptography-first CTF platform focused on understanding, not guesswork. Happy cracking!

Cryptography Guide Now Available

Jan 04, 2026

We’ve published a crypto guide to help you master the fundamentals here at https://book.crackable.xyz

Recent Joins

PuR63 from United States joined Feb 26, 2026
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pastaway joined Feb 19, 2026
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ripsou from France joined Feb 13, 2026
Mathankumar from India joined Feb 12, 2026
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zoro_rj from India joined Feb 01, 2026
ch4n7u from India joined Jan 27, 2026