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Overview of the Free Haven Project\\
Roger Dingledine
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Introduction
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\begin{itemize}
\item Who am I? (background)
\item Masters thesis project under Ron Rivest
\item Project leader for a group of 6 students
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Motivation
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\item Increased connectivity, power, storage, sense of community
\item No comparable increase in privacy/anonymity
\item Recent court cases (anon.penet.fi, OpenDVD)
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Strong Anonymity
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\item Publisher should not be known
\item Readers should not be identified
\item Location of documents unknown
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Some Requirements
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\item Robust (k of n reconstruction)
\item Content-neutral
\item Configuration preferences set by each node operator
\item Free/Opensource
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Some related works:
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\begin{itemize}
\item Eternity service
\item Zero Knowledge Systems
\item Rewebbers
\item Freenet
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Supported operations
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\begin{itemize}
\item Inserting (Information Dispersal algorithms)
\item Expiring (expiration chosen until publication)
\item Trading (currency)
\item Retrieving (via public key for document)
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Trading Protocol
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\begin{itemize}
\item Simplicity vs Accountability (fair exchange protocol, third party)
\item Three-message exchange:
\begin{itemize}
\item ``Here's a share, here's a description of what I'd like''
\item ``Sounds good. Would you like this share in return?''
\item ``Yes.''
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Accountability
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\begin{itemize}
\item Shepherd system (one fixed share, one roving)
\item Buddy system (both shares roving)
\item Receipts
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Trust Network
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\begin{itemize}
\item Broadcast opinions (or changes in opinions)
\item Believe broadcasts based on trust
\item Accept trades based on trust
\item Only risk as much as you've already gained
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Mixnet
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\begin{itemize}
\item Mixmaster III (SMTP)
\item Low-latency onion-routing
\item `Meeting' servers, keyservers, other extension ideas
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Implementation
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\begin{itemize}
\item Comm module
\item Haven module
\item CGI's, client-side UI, etc
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Conclusion
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\begin{itemize}
\item Status
\item Legal issues
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