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Along with the improvement of network bandwidth, identifying heavy-hitter flows on-line is more significant for some network application, such as congestion controlling, anomaly detecting and so on. In this paper, we propose a novel algorithm REFI (Replacement-based Flow Identifying) to extract heavy-hitter flows online. On the basis of LRU replacement, REFI introduces flow size factor σ and modulating...
As the development of Internet, it is more and more difficult to detect anomaly promptly and precisely. In this paper, we proposed an anomaly detection algorithm based on the predicting of multi-level wavelet detail signals synchronously. Firstly, process the time series of traffic with non-decimated Haar wavelet transform and produce detail signals. Secondly, predict the detail signals of wavelet...
Existing host-based Intrusion Detection Systems use the operating system log or the application log to detect misuse or anomaly activities. These methods are not sufficient for detecting intrusion in the database systems. In this paper, we describe a method for detecting malicious activities in a database management system by using data dependency relationships. Typically, before a data item is updated...
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