  The standard for wireless communication of high-speed data in mobile phones
and data terminals, called LTE (Long-Term Evolution) and marketed as 4G/LTE, is
quickly being adopted worldwide. The security of this type of communication is
a crucial factor mainly due to its mobile and wireless nature. This work
includes a practical analysis of the SNOW 3G generator used to protect the
confidentiality and integrity in LTE communications. In particular, several
techniques to perform multiplications and LFSR operations have been studied and
implemented on both iOS and Android platforms. The evaluation of those
implementations led to some conclusions that could be used to improve the
efficiency of future implementations of the standard.
