Documentation
# DES-CFB8
# From FIPS Pub 81 Appendix D2


# CFB8-DES.Encrypt and CFB8-DES.Decrypt 
Klen = 8
Ilen = 8
Len = 10
Key = 0123456789abcdef
IV = 1234567890abcdef
#Plaintext = "Now is the"
Plaintext = 4e6f7720697320746865
Ciphertext = f31fda07011462ee187f