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The Cipher Challenge Contest

378
Challenges
14,825
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
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

loyila3264
loyila3264

Solved Level 1 challenge Number Sequence

Jerva
Jerva

Solved Level 2 challenge The Fialka Challenge – Part 1

Martin Pescador
Martin Pescador
Tobilin
Tobilin

Solved Level 1 challenge A hidden word

Tobilin
Tobilin

Solved Level 1 challenge Number Sequence — Part 2

Scrince
Scrince

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