The Cipher Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 1 challenge The Syllabary Cipher – Part 1
Solved Level 2 challenge The Hutton Cipher – Part 1
Solved Level 2 challenge The T52 Sturgeon Challenge — Part 4
Solved Level 2 challenge Cracking SHA1-Hashed Passwords
Solved Level 1 challenge ADFGVX — Part 1
Solved Level 1 challenge Enigma Messages
Solved Level 1 challenge Alberti Challenge — Part 1
Solved Level 2 challenge Cracking SHA1-Hashed Passwords
Four degrees of difficulty, from pen & paper to complex mathematical problems