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The Crypto Challenge Contest

372
Challenges
13,621
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
E42214030
E42214030

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

brad draeg
brad draeg

Solved Level 1 challenge Number Sequence

SDF548y4
SDF548y4

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

E42214045
E42214045

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

Patrick Foster
Patrick Foster

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

E42214047
E42214047

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

Switch888
Switch888

Solved Level 2 challenge Alice's Birthday Party (Part 1)

Switch888
Switch888

Solved Level 2 challenge Cracking SHA1-Hashed Passwords

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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