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The Cipher Challenge Contest

376
Challenges
14,531
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
jgamblin
jgamblin

Solved Level 2 challenge Flawed Usage of a OTP Cipher by the BND

jgamblin
jgamblin
jgamblin
jgamblin
jgamblin
jgamblin
Kent Sokolis
Kent Sokolis

Solved Level 1 challenge Number Sequence — Part 2

Kent Sokolis
Kent Sokolis

Solved Level 1 challenge Number Sequence

jgamblin
jgamblin

Solved Level 2 challenge AES ECB Wrong Encoding

Szotya
Szotya

Solved Level 1 challenge Snow White and the seven dwarfs

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: