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The Crypto Challenge Contest

371
Challenges
13,459
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 Factorization Cipher — Part 3

Kaz
Kaz

Solved Level 2 challenge Homophonic Encryption — Part 2

Kaz
Kaz

Solved Level 2 challenge Homophonic Encryption — Part 1

Kaz
Kaz

Solved Level 1 challenge ¿No Hablas Español? No problemo!

Kaz
Kaz

Solved Level 1 challenge Cryptanalysis Hacking Puzzles — Part 2

Kaz
Kaz

Solved Level 2 challenge M-138 — Part 3

Martin Pescador
Martin Pescador

Solved Level 2 challenge Factorization Cipher — Part 2

Kaz
Kaz

Solved Level 2 challenge Molehunt (Part 3/3)

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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