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The Cipher Challenge Contest

376
Challenges
14,532
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
Emanuele
Emanuele

Solved Level 1 challenge Turing Bombe Enigma I

Emanuele
Emanuele

Solved Level 1 challenge Enigma Combinatorics

Emanuele
Emanuele
Emanuele
Emanuele
Emanuele
Emanuele
Emanuele
Emanuele

Solved Level 1 challenge Playfair with hints about the grid

Emanuele
Emanuele

Solved Level 1 challenge Playfair Encryption

jgamblin
jgamblin
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: