\begin{thebibliography}{1}

\bibitem{Handbook97}
A.J. Menezes, P.C.~Van Oorschot, and S.A. Vanstone.
\newblock {\em Handbook of Applied Cryptography}.
\newblock CRC press, 1997.

\bibitem{Stallings03}
William Stallings.
\newblock {\em Cryptography and Network Security: Principles and Practice}.
\newblock Prentice Hall, 2003.

\end{thebibliography}
