The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge Twisting the Rubik's Cube
Solved Level 2 challenge "The Road" — Part 1
Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 2
Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 1
Solved Level 1 challenge Grille Cipher
Solved Level 2 challenge Assembly Point – Part 2
Solved Level 1 challenge Factorization Cipher — Part 1
Solved Level 2 challenge The SZ42 Challenge — Part 3
Four degrees of difficulty, from pen & paper to complex mathematical problems