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and dirservers are better for non-clique situations

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svn:r668
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Roger Dingledine 2003-10-24 04:09:10 +00:00
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doc/tor-design.tex
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@ -679,11 +679,14 @@ the shared directory is straightforward, and is described in the Tor
specification \cite{tor-spec}.
% we should, uh, add this to the spec. oh, and write it. -RD
Because the directories are signed, they can be cached at all the other
onion routers (or even elsewhere). Thus directory servers are not a
performance bottleneck when we have many users, and also they won't
aid traffic analysis by forcing clients to periodically announce their
existence to any central point.
Using directory servers rather than flooding approaches provides
simplicity and flexibility. For example, they don't complicate
the analysis when we start experimenting with non-clique network
topologies. And because the directories are signed, they can be cached at
all the other onion routers (or even elsewhere). Thus directory servers
are not a performance bottleneck when we have many users, and also they
won't aid traffic analysis by forcing clients to periodically announce
their existence to any central point.
\Section{Rendezvous points: location privacy}
\label{sec:rendezvous}