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The Cipher Challenge Contest

377
Challenges
14,692
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
E42314091
E42314091

Solved Level 2 challenge Brute-Force-Attack on Triple-DES with Reduced Key Space

Rogue Rambler
Rogue Rambler

Solved Level 1 challenge Assembly Point – Part 1

Snake
Snake

Solved Level 1 challenge Assembly Point – Part 1

Snake
Snake
jgamblin
jgamblin

Solved Level 2 challenge The Syllabary Cipher – Part 3

Peter Uelkes
Peter Uelkes

Solved Level 1 challenge A disguised code

Patrick Foster
Patrick Foster

Solved Level 2 challenge Cipher ID — Part 1

jgamblin
jgamblin

Solved Level 2 challenge Wheatstone Cryptograph — 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: