ANONYMITY SETTING DEVICE, ANONYMITY SETTING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an anonymity setting device capable of satisfying desired anonymity by weaker anonymity setting when anonymization processing is applied on data collectively.SOLUTION: An anonymity setting device 1 comprises: a sort unit 11 for calculating a distance D between records of a source table and calculating a value n by sorting the distance D; a maintenance probability calculation unit 12 for determining a parameterρwhich is maintenance probability of each attribute; a matrix calculation unit 13 for calculating a transition probability matrix of an attribute (a); and a table transition unit 14 for making a value of each attribute of a table transition by using the transition probability matrix.