\begin{frame}[t]{Privacy concerns}
	\begin{columns}
		\begin{column}{0.65\textwidth}
	\begin{figure}
		\includegraphics[width=\textwidth]{img/scandals.jpg}
	\end{figure}
		\end{column}
		\begin{column}{0.35\textwidth}
	\begin{center}
		\vspace{3cm}
		\Large Privacy issues have many \underline{different faces}
	\end{center}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame}
	\frametitle{The impact of our technological choices}

	%\begin{figure}[h]
		\Large The underlying Internet \underline{infrastructure}\\allows the collection\\of \underline{communication metadata}.

		\vspace{1cm}

		\tikzsetnextfilename{actors}
		\begin{tikzpicture}[scale=1]
			\node (cp1) at (0,0) {\includegraphics[scale=0.26]{img/computer.pdf}};
			\node[below = 0cm of cp1] (cp1t) {Alice};
			\node (np1) at (2.4,0) {\includegraphics[scale=1]{img/network-provider.pdf}};
			\node[below = 0.1cm of np1, text width = 2cm,align=center] (cp1t) {Network Provider};
			\node (sp) at (4.75,0) {\includegraphics[scale=1]{img/service-provider.pdf}};
			\node[below = 0.1cm of sp, text width = 2cm,align=center] (spt) {Service Provider};
			\node (np2) at (7.1,0) {\includegraphics[scale=1]{img/network-provider.pdf}};
			\node[below = 0.1cm of np2, text width = 2cm,align=center] (spt) {Network Provider};
			\node (cp2) at (9.5,0) {\includegraphics[scale=0.26]{img/computer.pdf}};
			\node[below = 0cm of cp2] (cp2t) {Bob};
			\draw[<->, solid, black, line width=1mm] (cp1) edge (np1);
			\draw[<->, solid, black, line width=1mm] (np1) edge (sp);
			\draw[<->, solid, black, line width=1mm] (sp) edge (np2);
			\draw[<->, solid, black, line width=1mm] (np2) edge (cp2);
			\node[above=-1.2cm of np1] (snp1) {\includegraphics[scale=0.10]{img/eye.pdf}};
			\node[above=-1.2cm of sp] (ssp) {\includegraphics[scale=0.10]{img/eye.pdf}};
			\node[above=-1.2cm of np2] (snp2) {\includegraphics[scale=0.10]{img/eye.pdf}};
		\end{tikzpicture}


	%\end{figure}
\end{frame}

\begin{frame}{Building a privacy-aware network}
	\tikzsetnextfilename{anonintro2}
	\begin{tikzpicture}[scale=1]
		\node (cp1) at (0,0) {\includegraphics[scale=0.26]{img/computer.pdf}};
		\node[below = 0cm of cp1] (cp1t) {Alice};
		\node (np1) at (2.4,0) {\includegraphics[scale=1]{img/network-provider.pdf}};
		\node[below = 0.1cm of np1, text width = 2cm,align=center] (cp1t) {Network Provider};
		\draw[<->, solid, black, line width=1mm] (cp1) edge (np1);

		\node (anet) at (4.75,0) {\includegraphics[scale=0.16]{img/tor.pdf}};
		\draw[<->, solid, black, line width=1mm] (np1) edge (anet);
		\node[below = 0cm of anet, text width = 2cm,align=center] (anett) {Tor};
		\node (qs) at (7,0) {\includegraphics[scale=1.3]{img/question.pdf}};
		\draw[<->, solid, black, line width=1mm] (anet) edge (qs);
		\node[below = 0cm of qs, text width = 2cm,align=center] (qst) {Unknown\\Destination};
		\node[above=-1.4cm of np1] (cloud1) {\includegraphics[scale=0.8]{img/cloud.pdf}};
	\end{tikzpicture}
	\begin{center}
		\normalsize \emph{"[A] system to hide who a participant communicates with [...] in spite of an \underline{unsecured telecommunication system}"}~\footnotemark[1]

		\Large With 2M+ users, \underline{Tor} is the biggest privacy-aware network
	\end{center}



	\footnotetext[1]{\fullcite{chaum1981untraceable}}
\end{frame}


\begin{frame}{Tor's limitation}

	\Large \underline{Performance}
	hinders Tor's adoption

	\begin{columns}
		\begin{column}{0.5\textwidth}
			\vspace{0.5cm}
			\begin{figure}
				\includegraphics[width=\textwidth]{img/fast.png}
			\end{figure}
		\end{column}
		\begin{column}{0.5\textwidth}
			\vspace{1cm}
			\begin{figure}
				\includegraphics[width=\textwidth]{img/torb.png}
			\end{figure}
		\end{column}
	\end{columns}


\end{frame}