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The Cipher Challenge Contest

378
Challenges
14,833
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 inducted into the Hall of Fame.
Challenges in four levels

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

Recent solves
chinafish
chinafish

Solved Level 1 challenge Letter to the Templars — Part 2

chinafish
chinafish

Solved Level 1 challenge Letter to the Templars — Part 1

chinafish
chinafish

Solved Level 1 challenge Recycled One-Time Pad

chinafish
chinafish

Solved Level 1 challenge A hidden word

chinafish
chinafish

Solved Level 1 challenge Enigma Messages

chinafish
chinafish

Solved Level 1 challenge Playfair with hints about the grid

chinafish
chinafish

Solved Level 1 challenge Reserve Hand Procedure — Part 1

chinafish
chinafish
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