The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Assembly Point – Part 1
Solved Level 1 challenge Autokey Cipher
Solved Level 1 challenge Letter to the Templars — Part 1
Solved Level 1 challenge A disguised code
Solved Level 1 challenge Number Sequence — Part 2
Solved Level 1 challenge Original Caesar Cipher
Solved Level 1 challenge Number Sequence
Solved Level 2 challenge Spanish Strip Cipher — Part 2
Four degrees of difficulty, from pen & paper to complex mathematical problems