The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge Enigma Part 1
Solved Level 1 challenge Enigma Messages
Solved Level 2 challenge Factorization Cipher — Part 3
Solved Level 2 challenge The Hutton Cipher – Part 2
Solved Level 2 challenge Factorization Cipher — Part 2
Solved Level 3 challenge Elliptic Boogaloo – Part 3
Solved Level 3 challenge Elliptic Boogaloo – Part 2
Solved Level 2 challenge Elliptic Boogaloo – Part 1
Four degrees of difficulty, from pen & paper to complex mathematical problems