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DATA DISTURBANCE AND RESTRUCTURING SYSTEM, DATA RESTRUCTURING APPARATUS, DATA RESTRUCTURING METHOD, AND DATA RESTRUCTURING PROGRAM
DATA DISTURBANCE AND RESTRUCTURING SYSTEM, DATA RESTRUCTURING APPARATUS, DATA RESTRUCTURING METHOD, AND DATA RESTRUCTURING PROGRAM
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机译：数据扰动和重构系统，数据重构装置，数据重构方法和数据重构程序
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摘要
PROBLEM TO BE SOLVED: To reduce processing cost for data restructuring.SOLUTION: The data disturbance and restructuring system of the present invention comprises a data disturbance apparatus and a data restructuring apparatus. The data disturbance apparatus generates a cross tabulation Y for a disturbance table from an initial table composed of N records having K attributes by using a transition probability matrix A that disturbs attribute values of only a part of the attributes. The data restructuring apparatus comprises a value range calculation unit, a matrix generation unit, a vector generation unit and an iterative Bayesian unit. The matrix generation unit generates, for each combination of the attribute values of holding attributes, a Q×Q partial transition probability matrix Afrom a component of the transition probability matrix A. The vector generation unit generates a Q-order vector Yfrom a component of the cross tabulation Y. The iterative Bayesian unit obtains a Q-order vector Xthat indicates a restructured cross tabulation for a disturbed attribute, from the partial transition probability matrix Aand the vector Y. A cross tabulation X is restructured using all vectors X.
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