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The Cipher Challenge Contest

379
Challenges
14,840
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
luigylemon
luigylemon

Solved Level 2 challenge A really long number sequence

luigylemon
luigylemon

Solved Level 1 challenge Number Sequence — Part 10

luigylemon
luigylemon

Solved Level 1 challenge Number Sequence — Part 9

luigylemon
luigylemon

Solved Level 1 challenge Number Sequence — Part 8

luigylemon
luigylemon

Solved Level 1 challenge Number Sequence — Part 5

luigylemon
luigylemon

Solved Level 1 challenge Number Sequence — Part 4

🤖
luigylemon

Solved Level 2 challenge The Hutton Cipher – Part 4

mohamed abd elgayed
mohamed abd elgayed

Solved Level 3 challenge Vinaigrette Signature Scheme

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