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The Cipher Challenge Contest

378
Challenges
14,761
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
Martin Pescador
Martin Pescador

Solved Level 2 challenge The T52 Sturgeon Challenge — Part 3

Martin Pescador
Martin Pescador

Solved Level 2 challenge The T52 Sturgeon Challenge — Part 2

Martin Pescador
Martin Pescador

Solved Level 2 challenge The T52 Sturgeon Challenge — Part 1

Luigi Tomelli
Luigi Tomelli

Solved Level 1 challenge A disguised code

Rob
Rob

Solved Level 1 challenge Autokey Cipher

Rob
Rob

Solved Level 1 challenge Find the right route — Part 1

Luigi Tomelli
Luigi Tomelli

Solved Level 2 challenge Twisting the Rubik's Cube

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