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The Cipher Challenge Contest

377
Challenges
14,675
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
Heike Schimansky
Heike Schimansky

Solved Level 1 challenge Original Caesar Cipher

Emanuele
Emanuele

Solved Level 2 challenge The SZ42 Challenge — Part 1

suriryuk
suriryuk

Solved Level 1 challenge The Syllabary Cipher – Part 1

lumi
lumi

Solved Level 1 challenge Autokey Cipher

Scrince
Scrince

Solved Level 1 challenge Original Caesar Cipher

lumi
lumi

Solved Level 2 challenge Factorization Cipher — Part 2

lumi
lumi

Solved Level 1 challenge Factorization Cipher — Part 1

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: