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The Crypto Challenge Contest

372
Challenges
13,583
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
AmazingGrace
AmazingGrace

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

E42214016
E42214016

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

e42214050
e42214050

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

disc_42
disc_42

Solved Level 1 challenge Playfair with hints about the grid

Alexander Kulpe
Alexander Kulpe

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

Alexander Kulpe
Alexander Kulpe

Solved Level 2 challenge Letter to the Templars — Part 3

Alexander Kulpe
Alexander Kulpe

Solved Level 1 challenge Letter to the Templars — Part 2

Alexander Kulpe
Alexander Kulpe

Solved Level 1 challenge A hidden word

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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