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The Crypto Challenge Contest

372
Challenges
13,793
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
NotWeird
NotWeird

Solved Level 1 challenge Original Caesar Cipher

NotWeird
NotWeird

Solved Level 1 challenge Number Sequence

mr.e
mr.e

Solved Level 1 challenge Original Caesar Cipher

Katatsumuri-maru
Katatsumuri-maru

Solved Level 1 challenge Modified Caesar Cipher

Katatsumuri-maru
Katatsumuri-maru

Solved Level 1 challenge The Syllabary Cipher – Part 1

Liam
Liam

Solved Level 1 challenge Original Caesar Cipher

Todd
Todd

Solved Level 1 challenge Original Caesar Cipher

Carthago
Carthago

Solved Level 1 challenge Number Sequence — Part 2

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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