The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge Find the right route — Part 1
Solved Level 2 challenge Twisting the Rubik's Cube
Solved Level 1 challenge Original Caesar Cipher
Solved Level 2 challenge Wheatstone Cryptograph — Part 2
Solved Level 1 challenge Merkle-Hellman Knapsack Challenge - Part 1
Solved Level 1 challenge The Syllabary Cipher – Part 1
Solved Level 1 challenge A disguised code
Solved Level 1 challenge Assembly Point – Part 1
Four degrees of difficulty, from pen & paper to complex mathematical problems