The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Find the right route — Part 3
Solved Level 2 challenge ASAC — A Strong(er) ADFGVX Cipher — Part 5
Solved Level 2 challenge Hilly — Part 2
Solved Level 1 challenge Music Code — Part 1
Solved Level 2 challenge ASAC — A Strong(er) ADFGVX Cipher — Part 3
Solved Level 2 challenge Weakened ElsieFour — Part 2
Solved Level 2 challenge Weakened Granit — Part 3
Solved Level 2 challenge "The Road" — Part 2
Four degrees of difficulty, from pen & paper to complex mathematical problems