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The Crypto Challenge Contest

372
Challenges
13,635
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
Klaus
Klaus

Solved Level 1 challenge Lightweight Introduction to Lattices — Part 2

Anna
Anna

Solved Level 1 challenge Number Sequence

Convallaria
Convallaria

Solved Level 1 challenge An Invisible Message

Convallaria
Convallaria

Solved Level 1 challenge A hidden word — Part 2

Piyush Agarwal
Piyush Agarwal

Solved Level 1 challenge ¿No Hablas Español? No problemo!

Luis Jr.
Luis Jr.

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

Luis Jr.
Luis Jr.

Solved Level 1 challenge From Russia with Love

Luis Jr.
Luis Jr.

Solved Level 1 challenge Number Sequence — Part 4

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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