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@@ -318,8 +318,7 @@ encryption, so any node on a circuit can read that circuit's traffic.
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{\bf Hordes} \cite{hordes-jcs} is based on Crowds but also uses multicast
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responses to hide the initiator. {\bf Herbivore} \cite{herbivore} and
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-{\bf P5} \cite{p5} go even further, requiring broadcast.
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-% XXX This should be $P^5$ in bold. How to do it? -RD
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+$\mbox{\bf P}^{\mathbf 5}$ \cite{p5} go even further, requiring broadcast.
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These systems are designed primarily for communication between peers,
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although Herbivore users can make external connections by
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requesting a peer to serve as a proxy.
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