==============================================================================
                             The LED Block Cipher
==============================================================================
For more informations see:

            https://sites.google.com/site/ledblockcipher/design
                                      or
            http://www.springerlink.com/content/630873l12h23484p

WARNING: DO NOT use this implementation in productive systems! For
EXPERIMENTAL USE ONLY.
==============================================================================

Usage

64-bit key:
./led-64 -p "01234567 89abcdef" -k "01234567 89abcdef" 
// ciphertext: fdd6fb98 45f81456

128-bit key:
./led-128 -p "01234567 89abcdef" -k "01234567 89abcdef 01234567 89abcdef" 
// ciphertext: 3131c231 205c3664