The Crypto Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge A hidden word — Part 2
Solved Level 1 challenge Bigram Substitution – Part 1 (Tutorial)
Solved Level 1 challenge Number Sequence — Part 3
Solved Level 1 challenge A hidden word
Solved Level 1 challenge Bigram Substitution – Part 1 (Tutorial)
Solved Level 1 challenge Beaver Code
Solved Level 1 challenge Number Sequence — Part 2
Solved Level 1 challenge Number Sequence
Four degrees of difficulty, from pen & paper to complex mathematical problems