The Crypto Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Number Sequence
Solved Level 2 challenge Enigma Part 1
Solved Level 1 challenge Number Sequence
Solved Level 1 challenge Number Sequence
Solved Level 2 challenge Homophonic Encryption — Part 4
Solved Level 1 challenge A disguised code
Solved Level 1 challenge A disguised code
Solved Level 1 challenge Original Caesar Cipher
Four degrees of difficulty, from pen & paper to complex mathematical problems