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Method and system for mitigation of distributed denial of service attacks based on IP neighbourhood density estimation
Method and system for mitigation of distributed denial of service attacks based on IP neighbourhood density estimation
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机译:基于ip邻域密度估计的缓解分布式拒绝服务攻击的方法和系统
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摘要
The invention describes a method and system of protecting computer systems from attacks over a network to which the computer system is connected, the method comprising the steps of (a) establishing, during attack-free operation of the computer system, a database in the form of a source-IP-histogram storing all request received from all sender at the computer system; (b) calculating and storing a smoothed source-IP-histogram from the source-IP-histogram obtained in step a); (c) applying a probability threshold on the smoothed source-IP-histogram to differentiate between acceptable sender and sender to be rejected; (d) monitoring requests to the computer system; (e) accepting a new sender if its assumed probability value derived from the smoothed-IP-histogram exceeds the threshold.
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