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- W2102889123 abstract "In this paper, we study content-based spam detection for spams that are generated by copying a seed document with some random perturbations. We propose an unsupervised detection algorithm based on an entropy-like measure called document complexity, which reflects how many similar documents exist in the input collection of documents. As the document complexity, however, is an ideal measure like Kolmogorov complexity, we substitute an estimated occurrence probability of each document for its complexity. We also present an efficient algorithm that estimates the probabilities of all documents in the collection in linear time to its total length. Experimental results showed that our algorithm especially works well for word salad spams, which are believed to be difficult to detect automatically." @default.
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- W2102889123 date "2011-01-01" @default.
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- W2102889123 title "Unsupervised Spam Detection by Document Probability Estimation with Maximal Overlap Method" @default.
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- W2102889123 doi "https://doi.org/10.1527/tjsai.26.297" @default.
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