MysteryTwister - The Cipher Challenge Contest

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The Cipher Challenge Contest

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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

Ron Stoner

Solved Level 2 challenge Homophonic Encryption — Part 2

Ron Stoner

Solved Level 2 challenge AES key — encoded in the machine readable zone of a European ePassport

Ron Stoner

Solved Level 2 challenge Brute-Force-Attack on Triple-DES with Reduced Key Space

Ron Stoner

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

Ron Stoner

Solved Level 2 challenge Enigma Part 2

Ron Stoner

Solved Level 2 challenge Not-so-Secret Message from Malawi — Part I (RSA)

Ron Stoner

Solved Level 2 challenge RSA: Two different keys — same ciphertext

Ron Stoner

Solved Level 2 challenge Enigma 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

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