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CryptoHack

A fun free 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
RSA or HMAC? Part 2 Crypto on the Web 100
Roll your Own Mathematics 90
Dancing Queen Block Ciphers 120
SSH Keys General 35
LFSR Destroyer Misc 250
Weekly Top Users
#1 winderica 3845
#2 y7 3250
#3 yellowtides 1995
#4 hack_at_ash 1435
#5 Rozi 1195
Recent Solves
Mixed Up lenerd
Bytes and Big Integers CheshireCat
Gaussian Reduction Faceless
ASCII Ghadir
RSA Starter 1 1312843584
Recent Solutions
CERTainly not alkampfer 0
Legendre Symbol Stitch42 0
Lemur XOR vizzdoom 0
JSON in JSON mathno1 0
LFSR Destroyer DanW 1

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