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The Cipher Challenge Contest

376
Challenges
14,522
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
Emanuele
Emanuele

Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 2

Voksán Gergely
Voksán Gergely

Solved Level 1 challenge A hidden word

Voksán Gergely
Voksán Gergely

Solved Level 1 challenge Original Caesar Cipher

Voksán Gergely
Voksán Gergely

Solved Level 1 challenge Number Sequence

Izmedore
Izmedore

Solved Level 1 challenge Number Sequence

Kiss Virág
Kiss Virág

Solved Level 1 challenge ADFGVX — Part 1

Santiago
Santiago

Solved Level 2 challenge Letter to the Templars — Part 3

Kiss Virág
Kiss Virág
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: