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The Crypto Challenge Contest

371
Challenges
13,418
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
Kaz
Kaz

Solved Level 1 challenge Modular Sequences

Kaz
Kaz

Solved Level 1 challenge Autokey Cipher

Kaz
Kaz

Solved Level 1 challenge Polyhomophonic Substitution — Part 1

Kaz
Kaz

Solved Level 1 challenge Find the right route — Part 1

Kaz
Kaz

Solved Level 1 challenge Alberti Challenge — Part 1

disc_42
disc_42

Solved Level 1 challenge Cryptanalysis Hacking Puzzles — Part 2

Kaz
Kaz

Solved Level 1 challenge A disguised code

disc_42
disc_42

Solved Level 1 challenge Modified Caesar Cipher

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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