A few rewordings in abstract and first paragraph

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\begin{abstract}

We present Tor, a connection-based low-latency anonymous communication

system which addresses many flaws in the original onion routing design.

system which addresses many limitations in the original onion routing design.

Tor works in a real-world Internet environment,

requires little synchronization or coordination between nodes, and

protects against known anonymity-breaking attacks as well

predecessor and successor, but no others. Traffic flowing down the circuit

is sent in fixed-size \emph{cells}, which are unwrapped by a symmetric key

at each node, revealing the downstream node. The original onion routing

project published several design and analysis papers in recent years

\cite{or-journal,or-discex,or-ih,or-pet}, but because the only

project published several design and analysis papers

\cite{or-journal,or-discex,or-ih,or-pet}. While there was briefly

a network of about a dozen nodes at three widely distributed sites,

the only long-running and publicly accessible

implementation was a fragile proof-of-concept that ran on a single

machine, many critical design and deployment issues were not considered

or addressed. Here we describe Tor, a protocol for asynchronous, loosely

machine. Many critical design and deployment issues were never implemented,

and the design has not been updated in several years.

Here we describe Tor, a protocol for asynchronous, loosely

federated onion routers that provides the following improvements over

the old onion routing design: