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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
JSON in JSON Crypto on the Web 40
Oh SNAP Block Ciphers 120
L-Win Misc 120
Bruce Schneier's Password: Part 2 Misc 250
Bruce Schneier's Password Misc 100
Weekly Top Users
#1 jo_k_er 2355
#2 Sinople 2100
#3 mandlebro 1970
#4 Yiming 1920
#5 Hexalyse 1675
Recent Solves
Token Appreciation sopmac
Passwords as Keys Ratman
Diffie-Hellman Starter 4 mandlebro
Diffie-Hellman Starter 3 mandlebro
Diffie-Hellman Starter 2 mandlebro
Recent Solutions
Factoring 0x14mth3n1ght 0
XOR Properties kastatine 0
Encoding Challenge kastatine 0
Greatest Common Divisor VHenrique05 0
Everything is Big beyeran 0

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