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Detection of Superpoints Using a Vector Bloom Filter
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DOI：10.1109/TIFS.2015.2503269.png)
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Internet attacks, such as distributed denial-of-service attacks and worm attacks, are increasing in severity and frequency. Identifying and mitigating realtime attacks are an important and challenging task for network administrators. An infected host can make a large number of connections to distinct destinations during a short time. Such a host is called a superpoint. Detecting superpoints can be utilized for traffic engineering and anomaly detection. This paper proposes a novel data streaming method for detecting superpoints and proves guarantees on its accuracy with low memory requirements. The superior performance of this method comes from a new data structure, called vector bloom filter (VBF), which is a variant of standard BF. The VBF consists of six hash functions, four of which take some consecutive bits from the input string as the corresponding value, respectively. The information of superpoints is obtained by using the overlapping of hash bit strings of the VBF. Theoretical analysis and experimental results show that the proposed method can detect superpoints precisely and efficiently through comparison with other existing approaches.
Keyword:
IP flow
superpoint
bloom filter
cardinality estimation
random variable
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