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The Crypto Challenge Contest

371
Challenges
13,462
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
Frank N. Stein
Frank N. Stein

Solved Level 1 challenge Number Sequence — Part 2

disc_42
disc_42

Solved Level 1 challenge From Russia with Love

disc_42
disc_42
Kaz
Kaz

Solved Level 2 challenge Homophonic Encryption — Part 3

disc_42
disc_42

Solved Level 1 challenge Nils away on travel

Kaz
Kaz

Solved Level 2 challenge The Syllabary Cipher – Part 3

Martin Pescador
Martin Pescador

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

SurvivorNick
SurvivorNick

Solved Level 1 challenge Original Caesar Cipher

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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