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@@ -423,8 +423,7 @@ financial health as well as network security.
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% this para should probably move to the scalability / directory system. -RD
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% this para should probably move to the scalability / directory system. -RD
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% Nope. Cut for space, except for small comment added above -PFS
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% Nope. Cut for space, except for small comment added above -PFS
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-\section{Crossroads: Policy issues}
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-\label{sec:crossroads-policy}
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+\section{Policy issues}
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Many of the issues the Tor project needs to address extend beyond
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Many of the issues the Tor project needs to address extend beyond
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system design and technology development. In particular, the
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system design and technology development. In particular, the
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@@ -802,8 +801,7 @@ time.
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%[XXX Mention correct DNS-RBL implementation. -NM]
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%[XXX Mention correct DNS-RBL implementation. -NM]
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-\section{Crossroads: Design choices}
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-\label{sec:crossroads-design}
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+\section{Design choices}
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In addition to social issues, Tor also faces some design challenges that must
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In addition to social issues, Tor also faces some design challenges that must
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be addressed as the network develops.
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be addressed as the network develops.
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@@ -969,15 +967,15 @@ reveal the path taken by large traffic flows under low-usage circumstances.
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\label{subsec:helper-nodes}
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\label{subsec:helper-nodes}
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It has been thought for some time that the best anonymity protection
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It has been thought for some time that the best anonymity protection
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-comes from running your own node~\cite{or-pet00,tor-design}.
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-(In fact, in Onion Routing's first design, this was the only option
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-possible~\cite{or-ih96}.) While the first implementation
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+comes from running your own node~\cite{tor-design,or-pet00}.
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+(In fact, this was the only option in the earliest Onion Routing
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+design~\cite{or-ih96}.) While the first implementation
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had a fixed path length of five nodes, first generation
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had a fixed path length of five nodes, first generation
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-Onion Routing design included random length routes chosen
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+Onion Routing design included random length routes chosen
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to simultaneously maximize efficiency and unpredictability in routes.
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to simultaneously maximize efficiency and unpredictability in routes.
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If one followed Tor's three node default
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If one followed Tor's three node default
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path length, an enclave-to-enclave communication (in which the entry and
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path length, an enclave-to-enclave communication (in which the entry and
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-exit nodes were run by enclaves themselves)
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+exit nodes were run by enclaves themselves)
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would be completely compromised by the
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would be completely compromised by the
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middle node. Thus for enclave-to-enclave communication, four is the fewest
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middle node. Thus for enclave-to-enclave communication, four is the fewest
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number of nodes that preserves the $\frac{c^2}{n^2}$ degree of protection
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number of nodes that preserves the $\frac{c^2}{n^2}$ degree of protection
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@@ -1188,8 +1186,7 @@ trust decisions than the Tor developers.
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%RIAA; less so if threat is to application data or individuals or...
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%RIAA; less so if threat is to application data or individuals or...
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\section{Scaling}
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\section{Scaling}
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-%\label{sec:crossroads-scaling}
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-%P2P + anonymity issues:
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+\label{sec:scaling}
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Tor is running today with hundreds of nodes and tens of thousands of
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Tor is running today with hundreds of nodes and tens of thousands of
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users, but it will certainly not scale to millions.
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users, but it will certainly not scale to millions.
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@@ -1486,16 +1483,16 @@ this stage if the developers stopped actively working on it. We may get
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an unexpected boon from the fact that we're a general-purpose overlay
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an unexpected boon from the fact that we're a general-purpose overlay
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network: as Tor grows more popular, other groups who need an overlay
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network: as Tor grows more popular, other groups who need an overlay
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network on the Internet are starting to adapt Tor to their needs.
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network on the Internet are starting to adapt Tor to their needs.
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-
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+%
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Second, Tor is only one of many components that preserve privacy online.
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Second, Tor is only one of many components that preserve privacy online.
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To keep identifying information out of application traffic, we must build
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To keep identifying information out of application traffic, we must build
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more and better protocol-aware proxies that are usable by ordinary people.
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more and better protocol-aware proxies that are usable by ordinary people.
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-
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+%
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Third, we need to gain a reputation for social good, and learn how to
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Third, we need to gain a reputation for social good, and learn how to
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coexist with the variety of Internet services and their established
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coexist with the variety of Internet services and their established
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authentication mechanisms. We can't just keep escalating the blacklist
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authentication mechanisms. We can't just keep escalating the blacklist
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standoff forever.
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standoff forever.
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-
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+%
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Fourth, as described in Section~\ref{sec:scaling}, the current Tor
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Fourth, as described in Section~\ref{sec:scaling}, the current Tor
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architecture does not scale even to handle current user demand. We must
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architecture does not scale even to handle current user demand. We must
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find designs and incentives to let clients relay traffic too, without
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find designs and incentives to let clients relay traffic too, without
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Roger Dingledine