\usepackage{graphics}
\usepackage{amsmath}
-\pagestyle{empty}
+%\pagestyle{empty}
\renewcommand\url{\begingroup \def\UrlLeft{<}\def\UrlRight{>}\urlstyle{tt}\Url}
\newcommand\emailaddr{\begingroup \def\UrlLeft{<}\def\UrlRight{>}\urlstyle{tt}\Url}
\Section{Attacks and Defenses}
\label{sec:attacks}
-%Below we summarize a variety of attacks, and discuss how well our
-%design withstands them.\\
+Below we summarize a variety of attacks, and discuss how well our
+design withstands them.\\
\noindent{\large\bf Passive attacks}\\
\emph{Observing user traffic patterns.} Observing the connection