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Summary: Inferring Internet Denial-of-Service Activity
David Moore
CAIDA
San Diego Supercomputer Center
University of California, San Diego
dmoore@caida.org
Geoffrey M. Voelker and Stefan Savage
Department of Computer Science and Engineering
University of California, San Diego
voelker,savageĦ @cs.ucsd.edu
Abstract
In this paper, we seek to answer a simple question: "How
prevalent are denial-of-service attacks in the Internet to-
day?". Our motivation is to understand quantitatively the
nature of the current threat as well as to enable longer-
term analyses of trends and recurring patterns of attacks.
We present a new technique, called "backscatter anal-
ysis", that provides an estimate of worldwide denial-of-
service activity. We use this approach on three week-long
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