CONVERSION PROCESSING METHOD, DEVICE AND PROGRAM AND RESTORATION PROCESSING METHOD, DEVICE AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To prevent data leakage from being generated from the distribution of data.

SOLUTION: A conversion processing method includes: a step (A) of, as for a plurality of records having attribute values about a plurality of attribute items stored in a first data storage section, detecting first distribution about the appearance frequency of the attribute value which appears about a specific attribute item among the plurality of attribute items; and a step (B) of converting each of at least partial attribute values among the attribute values into any of a plurality of second attribute values to be specified according to a predetermined first rule so that the first distribution can be turned into second distribution different from the first distribution.

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