The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Image Noise
Solved Level 1 challenge Letter to the Templars — 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
Solved Level 3 challenge The Heavy T52 Sturgeon Challenge — Part 7
Solved Level 1 challenge A hidden word — Part 2
Solved Level 1 challenge Enigma Messages with Repeated Letters — Part 4
Four degrees of difficulty, from pen & paper to complex mathematical problems