'Columbia University Libraries/Information Services'
Doi
Abstract
Distributed Denial of Service (DDoS)
has emerged as a major threat to
the operation of online network services
[1, 2, 3]. Current forms of DDoS attacks
implicate multiple groups of Internet
machines that have been taken over
and controlled by an attacker. These
machines, called bots, are manipulated
by the attacker to produce an excessive
surge of traffic toward a target server,
the victim. The target server is forced to
processing and/or to link-capacity starvation,
since malicious traffic is blended
with normal traffic, making it difficult to
weed out. Figure 1 depicts a DDoS attack
and its impact on the target server
