Spritz library for Arduino.
A spongy RC4-like stream cipher, Hash and MAC function.
This library can be used to:
* Encrypt data.
* Generate random numbers.
* Hash & authenticate data.
* setup() - To setup spritz state (spritz_t).
* setupIV() - Usable after setup() to add Nonce.
* stream() - Return random byte that can be used as a key.
* hash() - Hash function.
* mac() - Message Authentication Code (MAC) function.
Spritz paper: <https://people.csail.mit.edu/rivest/pubs/RS14.pdf>
In Arduino LibraryList: <http://playground.arduino.cc/Main/LibraryList#Cryptography>