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The Crypto Challenge Contest

375
Challenges
14,317
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
xiaozhuan
xiaozhuan

Solved Level 2 challenge Bigram Substitution – Part 2

Patrick Foster
Patrick Foster

Solved Level 2 challenge Alberti Challenge — Part 2

Liliann
Liliann

Solved Level 1 challenge Number Sequence

Klaus
Klaus

Solved Level 1 challenge Bigram Substitution – Part 1 (Tutorial)

Krish
Krish

Solved Level 1 challenge A hidden word — Part 2

Baani Mittal
Baani Mittal

Solved Level 1 challenge A hidden word — Part 2

Shiv
Shiv

Solved Level 1 challenge Number Sequence — Part 2

Javantea
Javantea

Solved Level 1 challenge Recycled One-Time Pad

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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