The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge Monoalphabetic substitution with camouflage — Part 3
Solved Level 2 challenge A Cloaked Substitution Cipher — Part 1
Solved Level 2 challenge Homophonic Encryption — Part 3
Solved Level 2 challenge Homophonic Encryption — Part 4
Solved Level 2 challenge Modified Vigenère Cipher
Solved Level 2 challenge Spanish Strip Cipher — Part 2
Solved Level 2 challenge Monoalphabetic Substitution with Nostradamus Flavor
Solved Level 2 challenge Monoalphabetic substitution with camouflage — Part 2
Four degrees of difficulty, from pen & paper to complex mathematical problems