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The Crypto Challenge Contest

371
Challenges
13,430
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
disc_42
disc_42

Solved Level 1 challenge A hidden word — Part 2

Jason
Jason

Solved Level 1 challenge Grille Cipher

Bob Kin
Bob Kin

Solved Level 1 challenge Affine Codes / Modulo Arithmetic with N / Extended Euclid

Kaz
Kaz

Solved Level 2 challenge Letter to the Templars — Part 3

Kaz
Kaz

Solved Level 1 challenge Letter to the Templars — Part 2

disc_42
disc_42

Solved Level 1 challenge A hidden word

Bob Kin
Bob Kin

Solved Level 1 challenge The Syllabary Cipher – Part 1

Bob Kin
Bob Kin

Solved Level 1 challenge Grille Cipher

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:
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