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• W4386869563 abstract "Network traffic anomaly detection is critical for advanced network applications. However, network traffic monitoring data arrive in a streaming fashion and could be infinite, which makes the offline algorithms that attempt to store the entire stream monitoring data for analysis not scalable. To well utilize the strong ability of tensor model, we use a tensor to represent the prior non-anomalous traffic matrices and propose a novel unsupervised anomaly detection framework that can be used to detect anomalies in a streaming fashion by making only one pass over the data while utilizing limited storage. In the framework, we propose a succinct tensor sketch to maintain, in a streaming model, the subspace that can well represent all prior non-anomalous data detected. Using the subspace, anomalies in each new incoming traffic monitoring data can be quickly detected based on a simple outlier score calculation. Further, we prove that the tensor sketch is mergeable. Exploiting this property, we propose a distributed anomaly detection framework in which the distributed node only needs to upload its succinct tensor sketch instead of the raw monitoring data to the central node to calculate the global subspace of the whole network, which greatly saves the transmission cost. We theoretically prove that our tensor sketch based anomaly detection algorithm compares favorably with the offline approach which calculates the subspace based on expensive global Singular Value Decomposition (SVD). The experimental results demonstrate the effectiveness and efficiency of our approach over other popular online anomaly detection algorithms." @default.
• W4386869563 created "2023-09-20" @default.
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• W4386869563 date "2023-12-01" @default.
• W4386869563 modified "2023-10-07" @default.
• W4386869563 title "On-line Network Traffic Anomaly Detection Based on Tensor Sketch" @default.
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• W4386869563 doi "https://doi.org/10.1109/tpds.2023.3316717" @default.
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