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The Crypto Challenge Contest

372
Challenges
13,806
Active members
You like riddles? Then this is your place!
MysteryTwister is a cipher contest, where you can solve cryptographic riddles (challenges) of different difficulty levels. If you are successful, you will be immortalized in the Hall of Fame.
Challenges in four levels

Four degrees of difficulty, from pen & paper to complex mathematical problems

Recent solves
Nccl
Nccl

Solved Level 1 challenge Number Sequence

xiaozhuan
xiaozhuan

Solved Level 1 challenge Music Code — Part 1

xiaozhuan
xiaozhuan

Solved Level 2 challenge Music Code — Part 2

Andresrgg
Andresrgg

Solved Level 1 challenge Original Caesar Cipher

Andresrgg
Andresrgg

Solved Level 1 challenge Number Sequence

Ralf Stephan
Ralf Stephan

Solved Level 1 challenge ECDH-Key Exchange for Beginners

Ralf Stephan
Ralf Stephan

Solved Level 1 challenge Enigma Combinatorics

Katatsumuri-maru
Katatsumuri-maru

Solved Level 1 challenge Number Sequence — Part 8

Learn, Hack & Connect

Solve challenges and connect with other users on Discord

Challenges in four levels

Four degrees of difficulty, from pen & paper to complex mathematical problems

Enter the Hall of Fame

Master challenges in four levels and secure your spot in the Hall of Fame

Start exploring the challenges
OUR 7 MOST SOLVED CHALLENGES:
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