The Crypto Challenge Contest
Four degrees of difficulty, from pen & paper to complex mathematical problems
Solved Level 2 challenge AES key — encoded in the machine readable zone of a European ePassport
Solved Level 2 challenge AES key — encoded in the machine readable zone of a European ePassport
Solved Level 1 challenge Advent-Challenge — Part 1
Solved Level 1 challenge Autokey Cipher
Solved Level 1 challenge Number Sequence — Part 8
Solved Level 2 challenge Alice's Birthday Party (Part 1)
Solved Level 2 challenge Alice's Birthday Party (Part 2)
Solved Level 2 challenge The Hutton Cipher – Part 2
Four degrees of difficulty, from pen & paper to complex mathematical problems