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@@ -1,5 +1,6 @@
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-
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\documentclass[times,10pt,twocolumn]{article}
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\documentclass[times,10pt,twocolumn]{article}
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+%\usepackage{/home/syverson/papers/latex8}
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+%\usepackage{/home/syverson/papers/times}
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\usepackage{latex8}
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\usepackage{latex8}
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\usepackage{times}
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\usepackage{times}
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\usepackage{url}
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\usepackage{url}
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@@ -44,7 +45,7 @@
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\begin{abstract}
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\begin{abstract}
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We present Tor, a connection-based low-latency anonymous communication
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We present Tor, a connection-based low-latency anonymous communication
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-system which addresses many flaws in the original onion routing design.
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+system which addresses many limitations in the original onion routing design.
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Tor works in a real-world Internet environment,
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Tor works in a real-world Internet environment,
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requires little synchronization or coordination between nodes, and
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requires little synchronization or coordination between nodes, and
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protects against known anonymity-breaking attacks as well
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protects against known anonymity-breaking attacks as well
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@@ -67,11 +68,14 @@ build a \emph{virtual circuit}, in which each node in the path knows its
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predecessor and successor, but no others. Traffic flowing down the circuit
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predecessor and successor, but no others. Traffic flowing down the circuit
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is sent in fixed-size \emph{cells}, which are unwrapped by a symmetric key
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is sent in fixed-size \emph{cells}, which are unwrapped by a symmetric key
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at each node, revealing the downstream node. The original onion routing
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at each node, revealing the downstream node. The original onion routing
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-project published several design and analysis papers in recent years
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-\cite{or-journal,or-discex,or-ih,or-pet}, but because the only
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+project published several design and analysis papers
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+\cite{or-journal,or-discex,or-ih,or-pet}. While there was briefly
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+a network of about a dozen nodes at three widely distributed sites,
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+the only long-running and publicly accessible
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implementation was a fragile proof-of-concept that ran on a single
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implementation was a fragile proof-of-concept that ran on a single
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-machine, many critical design and deployment issues were not considered
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-or addressed. Here we describe Tor, a protocol for asynchronous, loosely
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+machine. Many critical design and deployment issues were never implemented,
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+and the design has not been updated in several years.
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+Here we describe Tor, a protocol for asynchronous, loosely
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federated onion routers that provides the following improvements over
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federated onion routers that provides the following improvements over
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the old onion routing design:
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the old onion routing design:
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Paul Syverson