The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Playfair with hints about the grid
Solved Level 1 challenge Assembly Point – Part 1
Solved Level 2 challenge Polyphonic Substitution Cipher — Part 2
Solved Level 2 challenge Polyphonic Substitution Cipher — Part 1
Solved Level 2 challenge Polyhomophonic Substitution — Part 3
Solved Level 2 challenge Letter to the Templars — Part 3
Solved Level 1 challenge Letter to the Templars — Part 2
Solved Level 2 challenge CMEA 1
Four degrees of difficulty, from pen & paper to complex mathematical problems