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The Crypto Challenge Contest

372
Challenges
13,569
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
Ryan
Ryan

Solved Level 2 challenge Letter to the Templars — Part 3

Vitor
Vitor

Solved Level 1 challenge Advent-Challenge — Part 1

Terence
Terence

Solved Level 1 challenge Kaskade-S/T — Part 1

Terence
Terence

Solved Level 1 challenge Merkle-Hellman Knapsack Challenge - Part 1

Martin Pescador
Martin Pescador

Solved Level 2 challenge Kaskade-S/T — Part 3

Terence
Terence

Solved Level 1 challenge Grille Cipher

Ryan
Ryan

Solved Level 1 challenge Letter to the Templars — Part 2

Ryan
Ryan

Solved Level 1 challenge A hidden word

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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