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The Crypto Challenge Contest

372
Challenges
13,588
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
Martin Pescador
Martin Pescador

Solved Level 2 challenge A Cloaked Substitution Cipher — Part 1

User1
User1

Solved Level 1 challenge Number Sequence

Martin Pescador
Martin Pescador

Solved Level 2 challenge Monoalphabetic Substitution with Camouflage — Part 5

red_j0hn
red_j0hn

Solved Level 1 challenge Number Sequence — Part 3

Patrick Foster
Patrick Foster

Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 2

Martin Pescador
Martin Pescador

Solved Level 1 challenge Monoalphabetic substitution with camouflage — Part 4

Martin Pescador
Martin Pescador

Solved Level 2 challenge Monoalphabetic substitution with camouflage — Part 3

Patrick Foster
Patrick Foster

Solved Level 1 challenge Reserve Hand Procedure — Part 1

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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