[freehaven-cvs] pynchon: new intro for sec2

[nickm@seul.org (Nick Mathewson)]

Update of /home/freehaven/cvsroot/doc/pynchon-gate
In directory moria.mit.edu:/tmp/cvs-serv22693

Modified Files:
	pynchon.tex 
Log Message:
pynchon: new intro for sec2

Index: pynchon.tex
===================================================================
RCS file: /home/freehaven/cvsroot/doc/pynchon-gate/pynchon.tex,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -d -r1.17 -r1.18
--- pynchon.tex	15 Sep 2004 19:30:34 -0000	1.17
+++ pynchon.tex	15 Sep 2004 19:57:00 -0000	1.18
@@ -110,11 +110,25 @@
 message systems.)  We close with an evaluation of our succcess in
 section~\ref{sec:conclusions}.
 
-\section{Background}
+\section{Background and attacks}
 \label{sec:background}
+Here we present a brief outline of existing pseudonymity solutions, discuss
+attacks against them, and present novel analysis of the effectiveness of one
+kind of traffic analysis against the most popular currently deployed design.
 
 \subsection{Related Work}
 \label{subsec:related-work}
+Below we discuss existing designs for pseudonymous message delivery.  Many
+assume the existance of a ``forward'' anonymous channel that a sender can use
+to send a message to a known recipient while prenting the recipient, the
+infrastructure, and any attackers from knowing who is communicating with
+whom.  Currently deployed designs are based on Chaum's mix~\cite{chaum-mix}
+architecture, and include the  Mixmaster~\cite{mixmaster-spec} and
+Mixminion~\cite{mixminion} anonymous remailer networks.  It is trivial to use
+these systems to {\it send} pseudonymous messages: the sender can make an
+anonymous message pseudonymous by signing it with a public
+key associated with her pseudonym.  Thus, the designs below focs on the
+problem of {\it receiving} messages sent to a pseudonymous address.
 
 \subsubsection{Reply blocks and return addresses.}
 Chaum~\cite{chaum-mix} describes a method of using \emph{return addresses}
@@ -245,11 +259,11 @@
 interest, and provides a way to attack the security of the
 system~\cite{harmful}.
 
-\subsection{Known attacks against}
+\subsection{Known attacks against pseudonymity systems}
 \label{subsec:known-attacks}
 %XXXX writeme
 
-\subsection{Statistical disclosure}
+\subsection{Statistical disclosure against reply-block-based nym servers}
 \label{subsec:disclosure}
 
 \section{The Pynchon Gate Design}

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