From: Scott Schremmer (scotths@cs.washington.edu)
Date: Wed Dec 01 2004 - 04:55:10 PST
This paper deals with the issue of denial of service attacks and
flash crowd attacks. Denial of service attacks often occur as a result
of an attack by a virus or other malicious code. Flask crowds are similar
in make up, though they are often caused by large quantities in need of
a certain resource.
The paper proposes 2 ways to deal with this problem. The first,
aggregate congestion control deals with this by assuming that nodes which
have a similar (signature) ie are similar in nature. The granularity
chosen is left flexible so as to block denial of service attacks sent
at different times. They also describe push back in which upstream nodes
are used to lower the congestion through a region.
This paper does a good job explaining the reasons behind its
decision. On the negative, more information explaining methods of
differentiating real attacks from benign flash crowds and dealing with
them differently could add a lot to the paper.
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