Powered by the CrypTool project

© 2009-2026 MysteryTwister

Contact | Legal Notice | Privacy

The Cipher Challenge Contest

378
Challenges
14,779
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
Luigi Tomelli
Luigi Tomelli

Solved Level 1 challenge New Year's Greetings — Part 2

Martin Pescador
Martin Pescador
Martin Pescador
Martin Pescador
fabrilluvia
fabrilluvia

Solved Level 1 challenge Caesar Encryption

Martin Pescador
Martin Pescador

Solved Level 2 challenge The T52 Sturgeon Challenge — Part 8

Martin Pescador
Martin Pescador
fabrilluvia
fabrilluvia

Solved Level 1 challenge Number Sequence — Part 2

fabrilluvia
fabrilluvia

Solved Level 1 challenge Original Caesar 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