So remove the blank line between the rule `%%%------...' and the
`\section' line after it.
\fi
%%%--------------------------------------------------------------------------
\fi
%%%--------------------------------------------------------------------------
\section{Introduction}
This paper proposes protocols for \emph{identification} and
\section{Introduction}
This paper proposes protocols for \emph{identification} and
\fi
%%%--------------------------------------------------------------------------
\fi
%%%--------------------------------------------------------------------------
\section{Preliminaries}
\label{sec:prelim}
\section{Preliminaries}
\label{sec:prelim}
\fi
%%%--------------------------------------------------------------------------
\fi
%%%--------------------------------------------------------------------------
\section{A zero-knowledge identification scheme}
\label{sec:zk-ident}
\section{A zero-knowledge identification scheme}
\label{sec:zk-ident}
\fi
%%%--------------------------------------------------------------------------
\fi
%%%--------------------------------------------------------------------------
\section{A simple key-exchange protocol}
\label{sec:kx}
\section{A simple key-exchange protocol}
\label{sec:kx}
\fi
%%%--------------------------------------------------------------------------
\fi
%%%--------------------------------------------------------------------------
\section{Conclusions}
\label{sec:conc}
\section{Conclusions}
\label{sec:conc}
use, and proven that this modification is still secure.
%%%--------------------------------------------------------------------------
use, and proven that this modification is still secure.
%%%--------------------------------------------------------------------------
\section{Acknowledgements}
The Wrestlers Protocol is named after the Wrestlers pub in Cambridge where
\section{Acknowledgements}
The Wrestlers Protocol is named after the Wrestlers pub in Cambridge where
\bibliography{mdw-crypto}
%%%--------------------------------------------------------------------------
\bibliography{mdw-crypto}
%%%--------------------------------------------------------------------------
\ifshort\def\next{\end{document}}\expandafter\next\fi
\appendix
\section{Proofs}
\ifshort\def\next{\end{document}}\expandafter\next\fi
\appendix
\section{Proofs}