Here are all of the solutions to the challenges from H4TT 2.1.
Passkey Demo 1, 10 Passkey Demo 2, 20 Passkey Demo 3, 50 Fsociety Passkey Attacker, 80
File 251-6, 15 Logo 1, 20 Logo 2, 30 Logo 3, 40 The Money Rap, 40 Advanced Steganography, 150
Email 1, 10 Email 2, 15 Email 3, 20 Email 4, 50 So Many Files, So Little..., 60 The New Encryption System, 80
Well That's Odd, 50 Some Numbers, 70 Secret Email, 200
hAPI Hacking, 40