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Original Articles Open Access
This paper analyses the theory of KMP algorithm, using the irrelevant mismatching feature of main string and substring, proposed a kind of duplex layer structure hierarchical nesting string matching algorithm, and apply the improved algorithm to flow filtering technology. Under the condition of "large text - big Mode" string matching, the improved algorithm solves the problem of strong dynamic memory share and time-consuming about calculating the next value in the KMP algorithm. The experimental results suggest that the algorithm has higher matching efficiency under the condition of large data sets matching.
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Author(s): Lei Li Yuwan Gu Yan Chen and Yuqiang Sun
flow filtering, TCP message, KMP algorithm, string matching, KMP algorithm