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\usepackage{pdfsetup}\urlstyle{rm}

\begin{document}

\pagestyle{headings}
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\title{Security Protocols}
\author{Giampaolo Bella, Frederic Blanqui, Lawrence C. Paulson et al.}
\maketitle

\tableofcontents

\begin{center}
  \includegraphics[width=\textwidth,height=\textheight,keepaspectratio]{session_graph}
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\input{session}
\end{document}
