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The Crypto Challenge Contest

371
Challenges
13,426
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
Elijah Kin
Elijah Kin

Solved Level 1 challenge A disguised code

Elijah Kin
Elijah Kin

Solved Level 1 challenge Advent-Challenge — Part 1

Elijah Kin
Elijah Kin

Solved Level 1 challenge Factorization Cipher — Part 1

Elijah Kin
Elijah Kin

Solved Level 1 challenge Affine Codes / Modulo Arithmetic with N / Extended Euclid

Elijah Kin
Elijah Kin

Solved Level 2 challenge Letter to the Templars — Part 3

Elijah Kin
Elijah Kin

Solved Level 1 challenge A hidden word

Elijah Kin
Elijah Kin

Solved Level 1 challenge Letter to the Templars — Part 2

Elijah Kin
Elijah Kin

Solved Level 1 challenge Number Sequence — 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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