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The Cipher Challenge Contest

377
Challenges
14,710
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
Zerina17
Zerina17

Solved Level 1 challenge Number Sequence — Part 2

Zerina17
Zerina17

Solved Level 1 challenge Original Caesar Cipher

Zerina17
Zerina17

Solved Level 1 challenge Number Sequence

hatchet
hatchet

Solved Level 2 challenge Alice's Birthday Party (Part 2)

C-J-O
C-J-O

Solved Level 1 challenge Alberti Challenge — Part 1

C-J-O
C-J-O

Solved Level 1 challenge Assembly Point – Part 1

upsidedown
upsidedown

Solved Level 1 challenge Enigma Messages

C-J-O
C-J-O

Solved Level 1 challenge Pigpen with a twist — 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: