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CryptoHack

A free, fun platform for learning modern cryptography

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Learn By Doing

Learn about modern cryptography by solving a series of interactive puzzles and challenges. Get to know the ciphers and protocols that secure the digital world by breaking them.

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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
ECLCG (HITCON CTF) CTF Archive 0
Sus (ImaginaryCTF) CTF Archive 0
Share (HITCON CTF) CTF Archive 0
Leet Universe (ImaginaryCTF (Daily)) CTF Archive 0
Hyper512 (HITCON CTF) CTF Archive 0
Weekly Top Users
#1 b00177258 7360
#2 b00177481 5015
#3 b00177246 3765
#4 tec 3725
#5 Abhinav 3705
Recent Solves
Bounded Noise tec
Merkle Trees tupo_1310
Base64 pandorum
Hex pandorum
Modular Binomials Anzhe
Recent Solutions
Mixed Up ispo 0
Infinite Descent IAnmar0 0
Ticket Maestro (CryptoHack) r4sti 1
Ticket Maestro r4sti 1
WOTS Up 2 ispo 0

Level Up

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