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The Cipher Challenge Contest

378
Challenges
14,826
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
Martin Pescador
Martin Pescador

Solved Level 2 challenge The SZ42 Challenge — Part 1

Scrince
Scrince

Solved Level 1 challenge A hidden word

Scrince
Scrince

Solved Level 1 challenge Letter to the Templars — Part 1

Scrince
Scrince

Solved Level 1 challenge Caesar Encryption

Luda
Luda

Solved Level 2 challenge Assembly Point – Part 2

Luda
Luda

Solved Level 1 challenge Assembly Point – Part 1

Dr. René Bäder
Dr. René Bäder

Solved Level 1 challenge Advent-Challenge — Part 1

Dr. René Bäder
Dr. René Bäder

Solved Level 1 challenge Autokey 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