The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Number Sequence
Solved Level 1 challenge Bigram Substitution – Part 1 (Tutorial)
Solved Level 1 challenge A disguised code
Solved Level 2 challenge Hilly — Part 1
Solved Level 2 challenge Molehunt (Part 3/3)
Solved Level 1 challenge Lightweight Introduction to Lattices — Part 1
Solved Level 1 challenge Number Sequence
Solved Level 1 challenge Bigram Substitution – Part 1 (Tutorial)
Four degrees of difficulty, from pen & paper to complex mathematical problems