Applying data mining technique to intrusion detection and building a relevant model is the hotpot of studycurrently. This paper presents a typical data mining based IDS model, including data gathering and selection, datamining algorithm compare, system elements and model structure.
According to the definition of random experimentation and the demand of random sequence in cryptogra-phy, three typical methods to rectify the deviation of random sequence are given below. We discussed the charactersof their performance, furthermore gave the results of data analysis.
