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The Cipher Challenge Contest

377
Challenges
14,709
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 inducted into the Hall of Fame.
Challenges in four levels

Four degrees of difficulty, from pen & paper to complex mathematical problems

Recent solves
jgamblin
jgamblin

Solved Level 2 challenge The LoRa Cipher: Logic Randomness — Part 1

jgamblin
jgamblin

Solved Level 2 challenge Trendy Messenger

jgamblin
jgamblin

Solved Level 2 challenge Fastest in the West

jgamblin
jgamblin

Solved Level 2 challenge Breaking a Filter Generator

Jinx
Jinx

Solved Level 2 challenge A really long number sequence

Jinx
Jinx
Jinx
Jinx

Solved Level 1 challenge A hidden word — 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: