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The Crypto Challenge Contest

370
Challenges
13,278
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
Giorgos
Giorgos

Solved Level 1 challenge Caesar Encryption

harryy31
harryy31

Solved Level 2 challenge Partial Key Exposure with RSA — Part 1

Ken
Ken

Solved Level 2 challenge Partial Key Exposure with RSA — Part 1

Daniel Richter
Daniel Richter

Solved Level 1 challenge From Russia with Love

Giorgos
Giorgos

Solved Level 1 challenge Original Caesar Cipher

Daniel Richter
Daniel Richter

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

Daniel Richter
Daniel Richter

Solved Level 1 challenge Advent-Challenge — Part 1

Daniel Richter
Daniel Richter

Solved Level 2 challenge Letter to the Templars — Part 3

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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