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The Crypto Challenge Contest

372
Challenges
13,865
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
Agam
Agam

Solved Level 1 challenge Number Sequence

mkeaudric
mkeaudric

Solved Level 1 challenge Advent-Challenge — Part 1

butter
butter

Solved Level 1 challenge Original Caesar Cipher

yujinchang
yujinchang

Solved Level 1 challenge Number Sequence

Patrick Foster
Patrick Foster

Solved Level 2 challenge Enigma Part 1

mkeaudric
mkeaudric

Solved Level 1 challenge Alberti Challenge — Part 1

mkeaudric
mkeaudric

Solved Level 1 challenge Merkle-Hellman Knapsack Challenge - Part 1

mkeaudric
mkeaudric

Solved Level 1 challenge The Syllabary 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:
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