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The Cipher Challenge Contest

376
Challenges
14,567
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
amseels
amseels

Solved Level 1 challenge Lightweight Introduction to Lattices — Part 2

Emanuele
Emanuele

Solved Level X challenge Ku Klux Klan

George Theofanidis-Nikodimou
George Theofanidis-Nikodimou

Solved Level 2 challenge Twisting the Rubik's Cube

Michel Van Caneghem
Michel Van Caneghem

Solved Level 2 challenge The Syllabary Cipher – Part 2

Michel Van Caneghem
Michel Van Caneghem

Solved Level 2 challenge The Josse Challenge – Part 3

Michel Van Caneghem
Michel Van Caneghem

Solved Level 1 challenge The Syllabary Cipher – Part 1

Emanuele
Emanuele

Solved Level 1 challenge Wheatstone Cryptograph — Part 1

Michel Van Caneghem
Michel Van Caneghem

Solved Level 2 challenge The Josse Challenge – Part 2

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: