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 2 comprises: a set calculation unit 21 for calculating a set R, Vfrom an anonymity setting parameter k and a source table τ and if R|≥k is satisfied, outputting ⊥(reject); a parameter calculation unit 22 for calculating parameters &rgr; and c; a matrix calculation unit 23 for calculating a transition probability matrix A by using the parameters &rgr; and c; and a table transition unit 14 for making a value of each attribute of a table transition by using the transition probability matrix.