DETECTING AND MITIGATING DENIAL OF SERVICE ATTACKS
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United States of America Patent
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Issued Date -
Jul 5, 2012
app pub date -
Dec 31, 2010
filing date -
Dec 31, 2010
priority date (Note) -
Abandoned
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Abstract
Embodiments of this invention provide methods for detecting a denial of service attack (DoS) and isolating traffic that relates to the attack. The method may begin by collecting network traffic data by observing individual packets carried over the network. The data may then be compiled into a time series comprising network traffic data relating successive time-intervals. A difference value based upon the entry in the time series for a large time-window and for a small time-window. A deviation score may then be determined by calculating the ratio of the difference values. The deviation score may indicate whether an attack occurred. In an embodiment of the invention, an attack is deemed to occur if the deviation score is between 0.6 and 1.4.
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