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The Crypto Challenge Contest

375
Challenges
14,300
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
Aditya
Aditya

Solved Level 1 challenge New Year's Greetings — Part 4

Spy_girl
Spy_girl

Solved Level 1 challenge Original Caesar Cipher

Artamiel
Artamiel

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

Patrick Foster
Patrick Foster

Solved Level 1 challenge Number Sequence — Part 6

Sam
Sam

Solved Level 1 challenge Number Sequence — Part 4

Sam
Sam

Solved Level 1 challenge Letter to the Templars — Part 1

Sam
Sam

Solved Level 1 challenge Number Sequence — Part 3

Sam
Sam

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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