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The Crypto Challenge Contest

375
Challenges
14,330
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
Alex
Alex

Solved Level 1 challenge Enigma Messages with Repeated Letters — Part 2

Patrick Foster
Patrick Foster

Solved Level 2 challenge A really long number sequence

Patrick Foster
Patrick Foster

Solved Level 2 challenge Hybrid Encryption I

Cogite
Cogite

Solved Level 2 challenge Wheatstone Cryptograph — Part 2

Rain
Rain

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

David
David

Solved Level 1 challenge Original Caesar Cipher

David
David

Solved Level 1 challenge Number Sequence

Pamphile
Pamphile

Solved Level 1 challenge Letter to the Templars — Part 2

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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