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The Crypto Challenge Contest

371
Challenges
13,423
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
Kaz
Kaz

Solved Level 1 challenge Letter to the Templars — Part 1

Kaz
Kaz

Solved Level 1 challenge Beaver Code

Carol Cronin
Carol Cronin

Solved Level 1 challenge Number Sequence

Kaz
Kaz

Solved Level 1 challenge Lightweight Introduction to Lattices — Part 1

Kaz
Kaz

Solved Level 1 challenge Caesar Encryption

newton
newton

Solved Level 1 challenge Caesar Encryption

El Chokoala
El Chokoala

Solved Level 1 challenge Number Sequence

disc_42
disc_42

Solved Level 1 challenge How do you become a big cryptographer?

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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