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The Crypto Challenge Contest

375
Challenges
14,239
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
Philipp
Philipp

Solved Level 1 challenge M-138 — Part 1

livinskull
livinskull

Solved Level 1 challenge Number Sequence — Part 3

livinskull
livinskull

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

livinskull
livinskull

Solved Level 1 challenge Number Sequence — Part 2

livinskull
livinskull

Solved Level 1 challenge Original Caesar Cipher

livinskull
livinskull

Solved Level 1 challenge Number Sequence

David
David

Solved Level 2 challenge Handycipher made in love — Part 1

David
David

Solved Level 2 challenge Advent Challenge — Part 4

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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