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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
Biltronz
Biltronz

Solved Level 1 challenge Original Caesar Cipher

chinafish
chinafish

Solved Level 1 challenge Snow White and the seven dwarfs

chinafish
chinafish

Solved Level 1 challenge Cascading Encryption — Part 1/3

chinafish
chinafish

Solved Level 1 challenge Nils away on travel

chinafish
chinafish

Solved Level 1 challenge From Russia with Love

chinafish
chinafish

Solved Level 1 challenge Hill Cipher with Sudoku Key

chinafish
chinafish
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