* \file arcfour.h
* \author Daniel Otte
* \date 2006-06-07
* \license GPLv3+
* \brief Implementation of the ARCFOUR (RC4 compatible) stream cipher algorithm.
*
* This header file defines the interface of the ARCFOUR cipher implementation.
*
* This implementation aims to be compatible with the ARCFOUR description
* available at
* http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt