The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge The Syllabary Cipher – Part 1
Solved Level 1 challenge Alberti Challenge — Part 1
Solved Level 1 challenge How do you become a big cryptographer?
Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 2
Solved Level 2 challenge Assembly Point – Part 2
Solved Level 2 challenge Lattice Part 1
Solved Level 2 challenge Lightweight Introduction to Lattices — Part 3
Solved Level 1 challenge Lightweight Introduction to Lattices — Part 2
Four degrees of difficulty, from pen & paper to complex mathematical problems