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CryptoHack

A fun platform for learning modern cryptography

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Break Crypto

Get your hands dirty and learn about modern cryptographic protocols by solving a series of interactive puzzles and challenges.

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Level Up

Earn points by solving challenges. Finish categories to earn trophies and gain levels to track your progress. Can you reach the top of the scoreboard?

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Fresh Challenges

We are constantly creating new challenges to keep your crypto knowledge up to date. Expect exciting brainteasers and whole new categories as the site continues to grow.

New Challenges
Modular Square Root Mathematics 35
Broken RSA Mathematics 100
Real Eisenstein Mathematics 150
Keyed Permutations Block Ciphers 5
Structure of AES Block Ciphers 15
Weekly Top Users
#1 p0fs 4145
#2 hellman 2845
#3 Cryptanalyse 2650
#4 gf128 2370
#5 Dmit 1840
Recent Solves
XOR Starter lbm
Everything is Big wilson
Square Eyes WeiLiToh
Finding Flags alekyou
CERTainly not Maneea
Recent Solutions
ECB Oracle Retr0id 0
Lemur XOR noillex 0
CERTainly not medvedisko 0
RSA Starter 2 0xThxmxs 0
Privacy-Enhanced Mail? ant400468 0

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