Explore Challenges
About MysteryTwister
Community
Account

Powered by the CrypTool project

© 2009-2026 MysteryTwister

Contact | Legal Notice | Privacy

The Cipher Challenge Contest

376
Challenges
14,553
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
Lukas Knöpfle
Lukas Knöpfle

Solved Level 1 challenge Lightweight Introduction to Lattices — Part 1

frog.of.war
frog.of.war

Solved Level 1 challenge Number Sequence

frog.of.war
frog.of.war
Seeker
Seeker

Solved Level 1 challenge Advent-Challenge — Part 1

Ja1pr
Ja1pr

Solved Level 1 challenge Number Sequence

Ja1pr
Ja1pr

Solved Level 1 challenge Original Caesar Cipher

c1ph3w
c1ph3w

Solved Level 1 challenge Monoalphabetic Substitution

c1ph3w
c1ph3w

Solved Level 1 challenge Beaver Code

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: