MysteryTwister - The Cipher Challenge Contest

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The Cipher Challenge Contest

381
Challenges

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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

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kr1shn4murt1

Solved Level 2 challenge BCR code (Book-Caesar-RSA)

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kr1shn4murt1

Solved Level 2 challenge Unusual encryption using a diophantine equation

.anout

Solved Level 1 challenge Number Sequence — Part 2

.anout

Solved Level 1 challenge Number Sequence

Giorgos

Solved Level 1 challenge Beaver Code

Ordan

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

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kr1shn4murt1

Solved Level 2 challenge Merkle-Hellman Knapsack Challenge — Part 2

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kr1shn4murt1

Solved Level 2 challenge A Cloaked Substitution Cipher — 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

Number Sequence
Level 1

Original Caesar Cipher
Level 1

Number Sequence — Part 2
Level 1

Caesar Encryption
Level 1

Beaver Code
Level 1

Number Sequence — Part 3
Level 1

Letter to the Templars — Part 1
Level 1