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 Number Sequence — Part 4
Solved Level 1 challenge Monoalphabetic substitution with camouflage — Part 1
Solved Level 2 challenge Cracking SHA1-Hashed Passwords
Solved Level 2 challenge Letter to the Templars — Part 3
Solved Level 1 challenge Letter to the Templars — Part 2
Solved Level 1 challenge Number Sequence — Part 4
Solved Level 1 challenge Caesar Encryption
Four degrees of difficulty, from pen & paper to complex mathematical problems