The Crypto Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge Molehunt (Part 3/3)
Solved Level 1 challenge Molehunt (Part 2/3)
Solved Level 1 challenge A modified homophonic cipher with reduced alphabets — Part 1
Solved Level 1 challenge Molehunt (Part 1/3)
Solved Level 1 challenge Number Sequence — Part 8
Solved Level 1 challenge Grille Cipher
Solved Level 1 challenge Factorization Cipher — Part 1
Solved Level 1 challenge Advent-Challenge — Part 1
Four degrees of difficulty, from pen & paper to complex mathematical problems