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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 ArthurJansen 3225
#2 sugymen 2575
#3 triettran200800 2355
#4 countableclouds 2135
#5 nhdvn 1845
Recent Solves
No Leaks chaosgoose
RSA Starter 1 jorlando
Greatest Common Divisor warai
Modulus Inutilis e33e
Salty e33e
Recent Solutions
Adrien's Signs swish 0
CERTainly not kylma 0
Modular Inverting kylma 0
Backpack Cryptography swish 0
Privacy-Enhanced Mail? hexcomets 0

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