Patent ID: 9747467
Date: 2017-08-29
CPC Classifications: G06F,H04L

Claim:
1. An anonymized data generation method, comprising: generating, by using a computer and from a plurality of data blocks each of which includes a secret attribute value and a numeric attribute value, a plurality of groups each of which includes plural data blocks that satisfy a predetermined condition, wherein the predetermined condition includes a first condition and a second condition, the first condition being a condition that frequency distribution of secret attribute values included in the plural data blocks matches a predetermined pattern, and the second condition being a condition that points represented by numeric attribute values included in the plural data blocks are included in a first area that has a predetermined size; and replacing, by using the computer and for each of the plurality of groups, a numeric attribute value included in each of plural data blocks that belong to the group with a numeric attribute value calculated for the group, and wherein the generating comprises: