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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?

New ideas in development

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

View more -->

Weekly Top Users

#1 patrickd        2575
#2 priyansh71      2120
#3 CaptainHook     1940
#4 Hako            1910
#5 dogdogeatcatcat 1825

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Recent Solves

Broken RSA    dfyz        2021-08-14T22:58:38Z
Base64        vaporeyes   2021-08-14T22:53:39Z
Hex           vaporeyes   2021-08-14T22:52:15Z
ASCII         vaporeyes   2021-08-14T22:48:26Z
Finding Flags matthendrie 2021-08-14T22:48:04Z

View more -->

Recent Solutions

Point Addition     priyansh71      0
Gaussian Reduction priyansh71      0
Oh SNAP            nullablevoidptr 0
Manyprime          syntax_error    0
Passwords as Keys  syntax_error    0

View more -->

Level Up

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CryptoHack

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Categories

General
Mathematics
Block Ciphers
RSA
Diffie-Hellman
Elliptic Curves
Miscellaneous
Crypto on the Web

Credits

Illustrations from Ouch.pics
Drawn by Thierry Fousse
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